APRILIA SR 50 - USE AND MAINTENANCE BOOK Technical data

use and maintenance
SR 50
© 1998 aprilia s.p.a. - Noale (VE)
SAFETY WARNINGS
The following precautionary warnings are
used throughout this manual in order to convey the following messages:
The operations preceded by this symbol must be repeated also on the opposite side of the vehicle..
Safety warning. When you find this
symbol on the vehicle or in the manual,
be careful to the potential risk of personal
injury. Non-compliance with the indications
given in the messages preceded by this symbol may result in grave risks for your and
other people’s safety and for the vehicle!
If not expressly indicated otherwise, for the
reassembly of the units repeat the disassembly operations in reverse order.
The terms “right” and “left” are referred to
the rider seated on the vehicle in the normal
riding position.
Any mention to the use of the vehicle with
passenger is to be intended as referred only
to the countries where this is allowed.
First edition: june 2000
Reprint:
WARNING
Indicates a potential hazard which may
result in serious injury or even death.
CAUTION
Produced and printed by:
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Tel. +39 - (0)587 42 28 00
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E-mail: cld@cld.it
on behalf of:
aprilia s.p.a.
via G. Galilei, 1 - 30033 Noale (VE) - Italia
Tel. +39 - (0)41 58 29 111
Fax +39 - (0)41 44 10 54
www.aprilia.com
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use and maintenance
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TECHNICAL
Indicates a potential hazard which may
result in minor personal injury or damage to the vehicle.
NOTE The word “NOTE” in this manual precedes important information or instructions.
WARNINGS - PRECAUTIONS GENERAL ADVICE
Before starting the engine, carefully read this
manual and in particular the section “SAFE
DRIVE”.
Your and other people’s safety depends not
only on your quickness of reflexes and on
your agility, but also on what you know about
the vehicle, on its efficiency and on your
knowledge of the basic information for “SAFE
DRIVE”. Therefore, get a thorough knowledge of the vehicle, in such a way as to be
able to drive in the traffic safely.
NOTE This manual must be considered as
an integral part of the vehicle and must always accompany it, even in case of resale.
aprilia has produced this manual with the
maximum attention, in order to supply the
user with correct and updated information.
However, since aprilia constantly improves
the design of its products, there may be slight
discrepancies between the characteristics of
your vehicle and those described in this
manual. For any clarification concerning the
information contained in this manual, do not
hesitate to contact your aprilia Official
Dealer.
For control and repair operations not expressly described in this publication, for the
purchase of aprilia genuine spare parts,
accessories and other products, as well as
for specific advice, contact exclusively
aprilia Official Dealers and Service Centers,
which guarantee prompt and accurate assistance.
Thank you for choosing aprilia. We wish
you a nice ride.
All rights as to electronic storage, reproduction and total or partial adaptation, with any
means, are reserved for all Countries.
NOTE In some countries the antipollution
and noise regulations in force require periodical inspections.
The user of the vehicle in these countries
must:
– contact an aprilia Authorized Dealer to
have the non-homologated components
replaced with others homologated for use
in the country in question;
– carry out the required periodical inspections.
In this manual the various versions are indicated by the following symbols:
automatic light switching version
(Automatic Switch-on Device)
optional
Electronic fuel injection
VERSION:
NOTE When asking your Dealer for spare
Italy
Poland
parts, specify the spare parts code indicated
on the SPARE PARTS IDENTIFICATION
LABEL.
Write down the identification code in the
space here below, in order to remember it
also in case of loss or deterioration of the
label.
The label is stuck on the right beam of the
frame; to be able to read it, remove the right
inspection cover, see p. 52 (REMOVING THE
RIGHT AND LEFT INSPECTION COVERS).
United Kingdom
Israel
Austria
South Korea
Portugal
Malaysia
Finland
Chile
Belgium
France
Bermuda
United States
of America
Australia
Spain
Brazil
Greece
South Africa
Holland
New Zealand
Switzerland
Canada
Denmark
Croatia
Japan
Slovenia
Germany
Singapore
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TABLE OF CONTENTS
SAFE DRIVE ................................................... 5
BASIC SAFETY RULES .................................. 6
CLOTHING ...................................................... 9
ACCESSORIES ............................................. 10
LOAD ............................................................. 10
ARRANGEMENT OF THE MAIN ELEMENTS . 12
ARRANGEMENT OF THE INSTRUMENTS/
CONTROLS ...................................................... 14
INSTRUMENTS AND INDICATORS ................ 14
INSTRUMENT AND INDICATOR TABLE ...... 15
16
INJECTION CHECK WARNING LIGHT
MAIN INDIPENDENT CONTROLS .................. 16
CONTROLS ON THE LEFT
SIDE OF THE HANDLEBAR ......................... 16
CONTROLS ON THE RIGHT
SIDE OF THE HANDLEBAR ......................... 17
IGNITION SWITCH ....................................... 18
STEERING LOCK ......................................... 18
AUXILIARY EQUIPMENT ................................ 19
UNLOCKING / LOCKING THE SADDLE ...... 19
CRASH HELMET /
GLOVE COMPARTMENT ............................. 19
ANTI-THEFT HOOK ...................................... 19
BATTERY / TOOL
KIT COMPARTMENT .................................... 20
BAG HOOK ................................................... 20
REAR
MUDGUARD EXTENSION ............................ 20
MAIN COMPONENTS ................................... 20
FUEL ............................................................. 21
LUBRICANTS ................................................ 22
TRANSMISSION OIL .................................... 22
2 STROKE OIL .............................................. 23
BRAKE FLUID - recommendations ............... 24
DISC BRAKES .............................................. 25
COOLANT ..................................................... 26
CHECKING AND TOPPING UP .................... 27
TYRES ........................................................... 28
AUTOMATIC
LIGHT SWITCHING VERSION
............. 29
CATALYTIC SILENCER ................................ 30
EXHAUST SILENCER ................................... 30
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INSTRUCTIONS FOR USE .............................. 31
PRELIMINARY CHECKING OPERATIONS .. 31
STARTING ..................................................... 32
DEPARTURE AND DRIVE ............................ 34
RUNNING-IN ................................................. 36
STOPPING .................................................... 37
PARKING ....................................................... 37
POSITIONING THE
VEHICLE ON THE STAND ............................ 38
SUGGESTIONS TO PREVENT THEFT ........ 38
MAINTENANCE ............................................... 39
REGULAR SERVICE INTERVALS CHART .. 40
IDENTIFICATION DATA ................................ 43
AIR CLEANER ............................................... 44
FRONT WHEEL ............................................ 45
REAR WHEEL ............................................... 47
CHECKING THE BRAKE PAD WEAR .......... 48
CHECKING THE STEERING ........................ 49
CHECKING
THE ENGINE FULCRUM AXIS ..................... 49
REMOVING THE
COVER SUPPORT ELEMENT ..................... 50
REMOVING THE FRONT COVER ................ 50
REMOVING THE LOWER
HANDLEBAR COVER ................................... 51
PARTIAL REMOVAL OF THE
UPPER HANDLEBAR COVER ..................... 51
REMOVING THE RIGHT AND
LEFT INSPECTION COVERS ....................... 52
INSTALLING THE REAR
MUDGUARD EXTENSION ............................ 53
REMOVING THE REAR-VIEW MIRRORS ... 53
REMOVING THE FRONT INNER SHIELD ... 54
REMOVING THE REAR
BRAKE CALIPERS ....................................... 55
REMOVING THE REAR
MUDGUARD ................................................. 56
REMOVING THE EXHAUST
SILENCER ..................................................... 56
CHECKING THE SWITCHES ....................... 57
IDLING ADJUSTMENT .................................. 58
ADJUSTING
THE ACCELERATOR CONTROL ................. 58
SPARK PLUG ................................................ 59
BATTERY ...................................................... 60
MAINTENANCE-FREE
BATTERIES
........................................... 60
LONG INACTIVITY OF THE BATTERY ........ 60
CHECKING AND CLEANING
THE TERMINALS .......................................... 61
REMOVING THE BATTERY .......................... 61
INSTALLING THE BATTERY ........................ 62
CHECKING THE ELECTROLYTE
LEVEL (ONLY FOR BATTERIES THAT
NEED MAINTENANCE) ................................ 62
RECHARGING THE BATTERY
(ONLY FOR BATTERIES THAT
NEED MAINTENANCE) ................................ 63
RECHARGING THE BATTERY
(ONLY FOR “MAINTENANCE-FREE”
BATTERIES) ................................................. 63
CHANGING THE FUSES .............................. 64
ADJUSTING THE VERTICAL
HEADLIGHT BEAM ....................................... 65
BULBS ........................................................... 65
CHANGING THE HEADLIGHT BULBS ......... 66
CHANGING THE HEADLIGHT
BULBS
.......................................... 66
CHANGING THE FRONT DIRECTION
INDICATOR BULBS ...................................... 67
CHANGING THE REAR DIRECTION
INDICATOR BULBS ...................................... 67
CHANGING THE DASHBOARD BULBS ...... 68
CHANGING THE REAR LIGHT BULB .......... 69
CHANGING THE NUMBER PLATE BULB .... 69
TRANSPORT ................................................... 70
DRAINING THE FUEL TANK ........................ 70
CLEANING ....................................................... 71
LONG PERIODS OF INACTIVITY ................ 72
TECHNICAL DATA ........................................... 73
LUBRICANT CHART ..................................... 77
Importers .................................................. 78-79
WIRING DIAGRAM - SR 50 .......................... 80
WIRING DIAGRAM - SR 50
.................. 82
WIRING DIAGRAM - SR 50
.. 84
safe drive
BASIC SAFETY RULES
To drive the vehicle it is necessary to be in
possession of all the requirements prescribed
by law (driving licence, minimum age, psychophysical ability, insurance, state taxes,
vehicle registration, number plate, etc.).
Gradually get to know the vehicle by driving
it first in areas with low traffic and/or private
areas.
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The use of medicins, alcohol and drugs or
psychotropic substances notably increases
the risk of accidents.
Be sure that you are in good psychophysical
conditions and fit for driving and pay particular attention to physical weariness and drowsiness.
Most road accidents are caused by the driver’s lack of experience.
NEVER lend the vehicle to beginners and,
in any case, make sure that the driver has
all the requirements for driving.
Rigorously observe all road signs and na
tional and local road regulations.
Avoid abrupt movements that can be dangerous for yourself and other people (for
example: rearing up on the back wheel,
speeding, etc.), and give due consideration
to the road surface, visibility and other driving conditions.
Avoid obstacles that could damage the vehicle or make you lose control.
Avoid riding in the slipstream created by preceding vehicles in order to increase your
speed.
Always keep both hands on the handlebars
and both feet on the footboard (or on the footrests), in the correct driving posture.
Avoid standing up or stretching your limbs
while driving.
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7
OIL
The driver should pay attention and avoid
distractions caused by people, things and
movements (never smoke, eat, drink, read,
etc.) while driving.
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COOLER
Use only the vehicle’s specific fuels and lubricants indicated in the “LUBRICANT
CHART”; check all oil, fuel and coolant levels regularly.
If the vehicle has been involved in an accident, make sure that no damage has occurred to the control levers, pipes, wires,
braking system and vital parts.
If necessary, have the vehicle inspected by
an aprilia Official Dealer, who should carefully check the frame, handlebars, suspensions, safety parts and all the devices that
you cannot check by yourself.
Always remember to report any malfunction
to the technicians to help them in their work.
Never use the vehicle when the amount of
damage it has suffered endangers your
safety.
ONLY ORIGINALS
A12
345
Never change the position, inclination or
colour of: number plate, direction indicators,
lights and horns.
Any modification of the vehicle will result in
the invalidity of the guarantee.
Any modification of the engine or of other
members which is aimed at increasing the
speed or the power of the vehicle is prohibited by the law; in fact, any modification resulting in an increase of the maximum speed
or of the engine displacement would change
the scooter into a motorcycle, which implies
the following obligations for the owner:
- new homologation;
- new registration;
- appropriate driving license.
Further, said modifications cause the loss of
the insurance cover, since insurance policies expressly prohibit to make technical
changes aimed at increasing the vehicle
performance levels.
For the reasons stated above, the failure to
comply with the tampering prohibition is punished by law with appropriate sanctions (including the confiscation of the vehicle),
which, according to the case, can be combined with the sanctions provided for not
using the crash helmet and/or the number
plate, for the violation of fiscal obligations
(ownership tax) and with penal sanctions
provided for using the vehicle without driving license.
Never race with other vehicles.
Avoid off-road driving.
CLOTHING
Before starting, always wear a correctly fastened crash helmet. Make sure that it is homologated, in good shape, of the right size
and that the visor is clean.
Wear protective clothing, preferably in light
and/or reflecting colours. In this way you will
make yourself more visible to the other drivers, thus notably reducing the risk of being
knocked down, and you will be more protected in case of fall.
This clothing should be very tight-fitting and
fastened at the wrists and ankles.
Strings, belts and ties should not be hanging loose; prevent these and other objects
from interfering with driving by getting en-
use and maintenance SR 50
9
Do not keep objects that can be dangerous
in case of fall, for example pointed objects
like keys, pens, glass vials etc. in your pockets (the same recommendations also apply
to passengers).
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ACCESSORIES
The owner of the vehicle is responsible for
the choice, installation and use of any accessory.
Avoid installing accessories that cover horns
or lights or that could impair their functions,
limit the suspension stroke and the steering
angle, hamper the operation of the controls
and reduce the distance from the ground and
the angle of inclination in turns.
Avoid using accessories that hamper access
to the controls, since this can prolong reaction times during an emergency.
Big fairings and windshields installed on the
vehicle may produce aerodynamic forces that
affect the stability of the vehicle, especially
when riding at high speed.
Make sure that the equipment is well fastened to the vehicle and not dangerous during driving. Do not install electrical devices
and do not modify those already existing to
avoid electrical overloads, because the vehicle could suddenly stop or there could be
a dangerous current shortage in the horn and
in the lights.
aprilia recommends the use of (aprilia
genuine accessories).
LOAD
Be careful and moderate when loading your
luggage. Keep any luggage loaded as close
as possible to the center of gravity of the
vehicle and distribute the load uniformly on
both sides, in order to reduce imbalance to
the minimum.
Furthermore, make sure that the load is firmly
secured to the vehicle, especially during long
trips.
KG!
Avoid hanging bulky, heavy and/or dangerous objects on the handlebars, mudguards
and forks: the vehicle might respond more
slowly in turns and its manoeuvrability could
be unavoidably impaired.
Do not place bags that are too bulky on the
vehicle sides, because they could hit people
or obstacles, making you lose control of the
vehicle.
Do not carry any bag if it is not tightly secured to the vehicle.
Do not exceed the maximum load allowed
for each side-bag.
Do not carry bags which protrude too much
from the luggage-rack or which cover the
lights, horn or indicators.
When the vehicle is overloaded, its stability
and its manoeuvrability can be compromised.
Do not carry animals or children on the glove
compartment or on the luggage-rack.
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11
ARRANGEMENT OF THE MAIN ELEMENTS
2
6
1
7
8
3
9
5
4
10
13
KEY
1) Coolant expansion tank plug
2) Rear brake reservoir
3) Bag hook
4) Battery/tool kit compartment cover
5) Fuse carrier
6) Fuel tank
7) Fuel tank plug
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12
11
8) Saddle lock
9) Passenger left footrest
(in the countries where required)
10) Air cleaner
11) Centre stand
12) Side stand
13) Left inspection cover
1
2
6
3
7
4
5
11
10
KEY
1) 2 stroke oil tank plug
2) 2 stroke oil tank
3) Crash helmet / glove compartment
4) Ignition switch/steering lock
5) Right inspection cover
6) Front brake reservoir
7) Horn
8) Battery
9
8
9) Spark plug
10) Anti-theft hook (for the aprilia “Body).
Guard” armored cable
11) Passenger right footrest
(in the countries where required)
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13
ARRANGEMENT OF THE INSTRUMENTS / CONTROLS
INSTRUMENTS AND INDICATORS
5
2
3
3
4
1
6
2
1
4
9
8
KEY
1) Electrical controls on the left side of the handlebar
2) Rear brake lever
3) Left rear-view mirror
4) Instruments and indicators
5) Right rear-view mirror
6) Throttle grip
7) Front brake lever
8) Electrical controls on the right side of the handlebar
9) Ignition switch/steering lock ( - - )
7
8
7a 7
6
KEY
1) Fuel level indicator ( )
2) Speedometer
3) Total kilometres odometer
4) Coolant temperature indicator ( )
5) Green direction indicator warning light (
6) Red 2 stroke oil reserve warning light (
7) Green low beam warning light ( )
7a) Blue high beam warning light ( )
9
5
)
)
8) Amber low fuel warning light ( )
9) Diagnostic system warning light (INJECTION CHECK)
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INSTRUMENT AND INDICATOR TABLE
Function
Description
Direction indicator warning light (
) It blinks when the direction indicators are on.
It comes on with the ignition switch in position ” ”, one brake lever pulled and the start push
button “ “ pressed, thus checking the correct operation of the bulb. If the light does not come
on during the starting, provide for replacing the bulb.
)
2 stroke oil reserve warning light (
Total kilometres odometer
It indicates the total number of kilometres covered.
Speedometer
Low beam warning light
If the warning light comes on and does not go out after the start push
button “ ” has been released, or if it comes on during normal functioning, this means that the 2 stroke oil reserve is being used; in this case, top up the 2
stroke oil tank, see p. 23 (2 STROKE OIL).
CAUTION
It indicates the driving speed.
(
)
It comes on when the headlight is in low beam position.
(
)
It comes on when the headlight in high beam position.
High beam warning light
Low fuel warning light
( )
It comes on when the quantity of fuel left in the tank is about 2 l.
Fuel level indicator
( )
It indicates the approximate fuel level in the tank.
Coolant
temperature indicator
Diagnostic system warning light
(injection check)
( )
It indicates the approximate temperature of the coolant in the engine.
When the pointer starts moving beyond the “min” level, the temperature is sufficient for driving
the vehicle. The normal running temperature range is indicated by the central area of the
scale.
If the pointer reaches the red area, stop the engine and check the coolant level, see p. 26
(COOLANT).
maximum allowed temperature is exceeded (red area “max” of
CAUTION Ifthethescale),
the engine may be seriously damaged.
It lights up for a few seconds when the ignition switch is turned to the “ ” position. If the warning
light comes on, follow the instructions given on page 16 (INJECTION CHECK WARNING LIGHT).
CAUTION
If the light does not go out, the vehicle is malfunctioning. Do not attempt to start it but contact an aprilia dealer.
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15
INJECTION CHECK WARNING LIGHT
MAIN INDIPENDENT CONTROLS
PRIORITY NO. 1
The warning light blinks rapidly (2 Hz).
2
CAUTION
If this happens, a potentially serious breakdown has occurred.
It is strongly recommended that you contact an aprilia Official Dealer.
If the vehicle is started, its functionality may be limited.
Stop the vehicle and take it to an aprilia Official Dealer.
1
PRIORITY NO. 2
The warning lights comes on and stays lit for at least 10 seconds.
CAUTION
This denotes a momentary malfunction that does not affect
the safety of the vehicle. The engine can be started. It is advisable to contact an aprilia Official Dealer as soon as possible.
CONTROLS ON THE LEFT SIDE OF THE HANDLEBAR
NOTE The electrical parts work only when the ignition switch is
in position “
”.
NOTE The lighting system works only when the engine is running.
1) HORN PUSH BUTTON ( )
The horn is activated when the push button is pressed.
)
2) DIRECTION INDICATOR SWITCH (
To indicate the turn to the left, move the switch to the left; to
indicate the turn to the right, move the switch to the right.
To turn off the direction indicator, press the switch.
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CONTROLS ON THE RIGHT SIDE OF THE HANDLEBAR
1
NOTE The electrical parts work only when the ignition switch is
in position “
1a
”.
NOTE The lighting system works only when the engine is running.
1) LIGHT SWITCH (
- •) (
not provided)
When the light switch is in position “ • ”, the lights are off; when
the switch is in position “ ”, the rear parking light and the low
beam are on.
1a) LIGHT SWITCH (
- •)
When the light switch is in position “ • ”, the lights are off; when
the switch is in position “ ” the low beam and the parking
lights are on; when it is in position “ ” the high beam and the
parking lights are on.
1b) DIMMER SWITCH (
)
(not provided for those
countries where the engine stop switch “
- ” is required)
When the dimmer switch is in position “ ”, the low beam and
the parking lights are on; when it is in position “ ”, the high
beam and the parking lights are on.
NOTE The lights can be switched off only by stopping the
engine.
1c) ENGINE STOP SWITCH ( - )
(in the countries where required)
WARNING
Do not operate the engine stop switch “
conditions.
-
” in running
1b
1c
2
This is a safety or emergency switch. With the switch in position
“ ”, it is possible to start the engine; the engine can be stopped
by moving the switch to position “
”.
CAUTION
With stopped engine and ignition switch in position “ ”, the
battery may run down.
When the vehicle has come to a halt, stop the engine, and
move the ignition switch to position “ ”.
2) START PUSH BUTTON ( )
When the start push button is pressed and one of the brake
levers (front or rear) is activated at the same time, the starter
makes the engine run.
For the starting procedure, see p. 32 (STARTING).
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17
Position
1
Steering
lock
IGNITION SWITCH
STEERING LOCK
The ignition switch is positioned on the right
side, near the steering column.
NOTE The key (1) operates the igni-tion/
steering lock switch, the battery/tool kit compartment lock and the saddle lock.
Two keys are supplied together with the vehicle (one spare key).
NOTE Do not keep the spare key on the
vehicle.
WARNING
Never turn the key to position “ ” in running conditions, in order to avoid losing
control of the vehicle.
OPERATION
To lock the steering:
◆ Turn the handlebar completely leftwards.
◆ Turn the key (1) to position “ ” and
press it.
◆ Release the key.
NOTE Turn the key and steer the handlebar at the same time.
◆ Rotate the key (1) anticlockwise (leftwards), steer the handlebar slowly until
the key (1) reaches position “ ”.
◆ Extract the key.
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Function
Key
removal
The steering is It is possible
to remove the
locked. It is
key.
neither
possible to
start the
engine, nor to
switch on the
lights.
Neither the en- It is possible
gine, nor the to remove the
lights can be key.
switched on.
The engine can
be started, the
turn indicators,
the horn, the
mixer oil warning light, the reserve
fuel
warning light,
the temperature indicator
(only if engine
is hot) and the
fuel gauge are
enabled.
It is not
possible to
remove the
key.
AUXILIARY EQUIPMENT
2
4
1
UNLOCKING / LOCKING THE
SADDLE
To unlock and lift the saddle:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Insert the key in the saddle lock (1).
◆ Turn the key clockwise and raise the saddle (2).
NOTE Before lowering and locking the saddle, make sure that you have not left the key
in the crash helmet / glove compartment.
◆ To lock the saddle, lower and press it
(without exerting too much pressure),
thus making the lock snap shut.
WARNING
Before leaving, make sure that the saddle is properly locked.
3
CRASH HELMET /
GLOVE COMPARTMENT
Thanks to the crash helmet/glove compartment, you no longer have to carry the crash
helmet or other objects with you eve-ry time
you park the vehicle. The compartment is
positioned under the saddle.
To reach it:
◆ Raise the saddle (2), see beside (UNLOCKING / LOCKING THE SADDLE).
NOTE Position the helmet with the opening facing downwards, as indicated in the figure.
ANTI-THEFT HOOK
The anti-theft hook (3) is positioned on the
right side of the vehicle, near the rider’s footboard.
To prevent the vehicle from being stolen, it
is advisable to secure it with the aprilia “BodyGuard” armored cable
(4), available at
any aprilia Official Dealer.
WARNING
Do not use the hook to lift the vehicle or
for any purpose other than securing the
vehicle once it has been parked.
WARNING
Do not load the crash helmet / glove compartment too much.
Maximum allowed weight: 2.5 kg.
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19
1
2
5
4
3
BATTERY / TOOL
KIT COMPARTMENT
This compartment is positioned in the lower
part of the vehicle, between the footrests.
To reach it, proceed as follows:
◆ Insert the key (1) in the lock.
◆ Rotate the key (1) clockwise, pull it and
remove the cover (2).
The tool kit (3) includes:
- 1 tool case;
- 1 21 mm spark plug socket spanner;
1 16-mm tubular ignition spanner;
- 1 socket spanner rod;
- 1 double-ended, cross-/cut headedscrewdriver type PH size 2;
- 1 screwdriver handle;
- 1 4 mm hexagon spanner.
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SR 50
BAG HOOK
WARNING
Do not hang excessively bulky bags or
parcels to the hook, as this may seriously
compromise the manoeuvrability of the
vehicle or the movement of your feet.
The bag hook (4) is positioned on the front
part of the inner shield.
REAR
MUDGUARD EXTENSION
The rear mudguard extension (5) is provided
as standard equipment and can be installed
if the vehicle is used on wet roads, since it
reduces the reach of the water spray caused
by the rear wheel.
NOTE The rear mudguard extension (5),
Max. allowed weight: 1.5 kg.
complete with screws and relevant nuts, is
supplied as standard equipment and is
housed in the crash helmet/glove
compartment.
For the installation, see p. 53 (INSTALLING
THE REAR MUDGUARD EXTENSION).
MAIN COMPONENTS
FUEL
WARNING
The fuel used for internal combustion
engines is extremely inflammable and in
particular conditions it can become explosive.
It is important to carry out the refuelling
and the maintenance operations in a wellventilated area, with the engine off.
Do not smoke while refuelling or near fuel
vapours, in any case avoid any contact
with naked flames, sparks and any other
heat source to prevent the fuel from
catching fire or from exploding.
Further, prevent fuel from flowing out of
the fuel filler, as it could catch fire when
getting in contact with the red-hot surfaces of the engine.
In case some fuel has accidentally been
spilt, make sure that the area is completely dry before starting the vehicle.
Since petrol expands under the heat of
the sun and due to the effects of sun radiation, never fill the tank to the brim.
1
Screw the cap carefully after refuelling.
Avoid any contact of the fuel with the skin
and the inhalation of vapours; do not
swallow fuel or pour it from a receptacle
into another by means of a tube.
DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.
KEEP AWAY FROM CHILDREN.
Use only unleaded petrol, in conformity with
the DIN 51607 standard, min. O.N. 95
(N.O.R.M.) and 85 (N.O.M.M.).
To refuel, proceed as follows:
◆ Lift the saddle, see p. 19 (UNLOCKING /
LOCKING THE SADDLE).
◆ Unscrew and remove the fuel tank plug
(1).
FUEL TANK CAPACITY
(reserve included): 8 l
TANK RESERVE: 2 l
CAUTION
Do not put additives or other substances
into the fuel.
If you use a funnel or other similar items,
make sure that they are perfectly clean.
◆ Refuel.
◆ Put back the cap (1).
WARNING
Make sure that the filler cap is well tightened.
use and maintenance SR 50
21
LUBRICANTS
CAUTION
WARNING
Oil can cause serious damage to the skin
if handled every day and for long periods.
Wash your hands carefully after using oil.
In case any maintenance operation has
to be carried out, it is advisable to use
latex gloves.
KEEP AWAY FROM CHILDREN.
DO NOT DISPOSE OF OIL IN THE ENVIRONMENT.
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use and maintenance
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Proceed with care.
Do not spill the oil!
Take care not to smear any component,
the area in which you are working and the
surrounding area.
Carefully remove any trace of oil.
CAUTION
In case of leakages or malfunctions, contact an aprilia Official Dealer.
TRANSMISSION OIL
Have the transmission oil level checked
every 4000 km (2500 mi), or every 6 months.
It is necessary to have the transmission oil
changed after the first 500 km (312 mi) and
successively every 12000 km (7500 mi), or
every 2 years.
To check the oil level and to change the oil,
contact an aprilia Official Dealer.
CAUTION
1
2 STROKE OIL
Top up the 2 stroke oil tank every 500 km
2000 km (1240 mi).
(312 mi),
The vehicle is provided with a separate mixer
that makes it possible to mix petrol with oil
for the lubrication of the engine, p. 77 (LUBRICANT CHART).
The vehicle is equipped with a control
unit which supplies the right quantity of oil
for engine lubrication through an electronic
pump (see “LUBRICANT CHART” on page
77).
The reserve is indicated by the coming on of
”
the 2 stroke oil reserve warning light “
positioned on the dashboard, see p. 14 and
15 (INSTRUMENTS AND INDICATORS).
The use of the vehicle without 2 stroke
oil causes serious damages to the engine.
If you run out of oil in the 2 stroke oil tank
or if the 2 stroke oil pipe has been removed, it is necessary to contact an
aprilia Official Dealer, who will provide
for bleeding the system.
This operation is indispensable, since the
operation of the engine with air in the 2
stroke oil system may cause serious damages to the engine itself.
To top up the 2 stroke oil tank, proceed
as follows:
◆ Lift the saddle, see p. 19 (UNLOCKING /
LOCKING THE SADDLE).
◆ Remove the plug (1).
2 STROKE OIL TANK CAPACITY: 1.6 l
TANK RESERVE: 0.5 l
◆ Top up the 2 stroke oil tank.
◆ Put back the cap (1).
CAUTION
Make sure that the filler cap is well
tightened.
CAUTION
Do not put additives or other substances
into the oil.
If a funnel or other system is used for topping up, make sure that it is perfectly
clean.
use and maintenance SR 50
23
BRAKE FLUID - recommendations
WARNING
Sudden resistance or clearance problems
on the brake lever may be due to troubles in the hydraulic system.
For any doubt regarding the perfect functioning of the braking system and in case
you are not able to carry out the usual
checking operations, contact your aprilia
Official Dealer.
WARNING
Pay special attention to the brake disc and
friction material, making sure that they are
neither dirty nor oily, especially after
maintenance operations or inspections.
Make sure that the brake pipe is neither
twisted nor worn out.
KEEP AWAY FROM CHILDREN.
DO NOT DISPOSE OF THE FLUID IN THE
ENVIRONMENT.
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DISC BRAKES
WARNING
The brakes are the parts that most ensure
your safety and for this reason they must
always be perfectly working; check them
before every trip.
A dirty disc soils the pads, with consequent reduction of the braking efficiency.
Dirty pads must be replaced, while dirty
discs must be cleaned with a high-quality degreaser.
The brake fluid must be changed every
two years by an aprilia Official Dealer.
For any doubt regarding the perfect functioning of the braking system and in case
you are not able to carry out the usual
checking operations, contact your aprilia
Official Dealer.
NOTE This vehicle is provided with front
and rear disc brakes, with separate hydraulic circuits.
The following information refers to a single
braking system, but is valid for both.
When the disc pads wear out, the brake fluid
level in the reservoir decreases to automatically compensate for their wear.
1
2
◆ Rotate the handlebar, so that the fluid contained in the brake reservoir (1) is parallel
to the “MIN” mark stamped on the glass
gauge (2).
◆ Make sure that the fluid (1) contained in
the reservoir exceeds the “MIN” mark
stamped on the glass gauge (2).
If the fluid does not reach at least the “MIN”
mark:
WARNING
Do not use the vehicle if the fluid does
not reach at least the ”MIN” mark.
The brake reservoirs are positioned under
the handlebar cover, near the brake lever
couplings.
Periodically check the brake fluid level in the
reservoirs, see below (CHECKING) and the
wear of the pads, see p. 48 (CHECKING THE
BRAKE PAD WEAR).
WARNING
Do not use the vehicle if the braking system leaks fluid.
CAUTION
When the disc pads wear out, the level of
the fluid decreases progressively to compensate for their wear.
◆ Check the brake pad wear, see p. 48
(CHECKING THE BRAKE PAD WEAR)
and the disc wear.
If the pads and / or the disc do not need replacing:
◆ Contact an aprilia Official Dealer, who
will provide for topping up.
CAUTION
CHECKING
To check the brake fluid level, proceed as
follows:
MIN = minimum level.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
Check the braking efficiency.
In case of excessive stroke of the brake
lever or reduced efficiency of the braking
system, contact an aprilia Official Dealer,
since it may be necessary to bleed the
system.
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25
COOLANT
CAUTION
1
Do not use the vehicle if the coolant is
below the minimum prescribed level
“MIN”.
Check the coolant level every 2000 km (1250
mi) and after long trips; have the coolant
changed by an aprilia Official Dealer every
2 years.
WARNING
The coolant is noxious: do not swallow
it; if the coolant gets in contact with the
skin or the eyes, it can cause serious irritations. If the coolant gets in contact
with your skin or eyes, rinse with plenty
of water and consult a doctor. If it is swallowed, induce vomit, rinse mouth and
throat with plenty of water and consult a
doc-tor without delay.
DO NOT DISPOSE OF THE FLUID IN THE
ENVIRONMENT.
KEEP AWAY FROM CHILDREN.
Be careful not to spill the coolant on the
red-hot parts of the engine: it may catch
fire and send out invisible flames.
In case maintenance operations are to be
performed, it is advisable to use latex
gloves.
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use and maintenance
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CAUTION
Have the coolant changed by an aprilia
Official Dealer.
The coolant is made up of 50% water and
50% antifreeze.
This mixture is ideal for most running temperatures and ensures good protection
against corrosion.
It is advisable to keep the same mixture also
in the hot season, since in this way losses
due to evaporation are reduced and it is not
necessary to top up very frequently.
The mineral salt deposits left in the radiator
by evaporated water are thus reduced and
the efficiency of the cooling system remains
unchanged.
If the outdoor temperature is below 0°C,
check the cooling circuit frequently and if necessary increase the antifreeze concentration
(up to maximum 60%).
For the cooling solution use distilled water,
in order not to damage the engine.
WARNING
Do not remove the expansion tank cap
(1) when the engine is hot, since the coolant is under pressure and its temperature
is high.
If it gets in contact with the skin or with
clothes it may cause severe burns and/
or damage.
1
1
2
CHECKING AND TOPPING UP
WARNING
Check the coolant level and top up the
expansion tank with cold engine.
◆ Stop the engine and wait until it has cooled
down.
NOTE Position the vehicle on firm and flat
ground.
◆ Remove the front cover, see p. 50 (REMOVING THE FRONT COVER).
◆ Make sure that the level of the fluid contained in the expansion tank (2) is included
between the “MIN” and “MAX” marks.
MIN = minimum level.
MAX= maximum level.
If not, proceed as follows:
Loosen the filling cap (1) without removing it (give it half turn anticlockwise).
Wait a few seconds in order to release any
residual pressure.
Unscrew and remove the cap (1).
WARNING
The coolant is noxious: do not swallow
it; if the coolant gets in contact with the
skin or the eyes, it can cause serious irritations.
Do not use your fingers or any other object to check if there is enough coolant.
CAUTION
Do not put additives or other subtances
into the fluid.
If you use a funnel or other similar items,
make sure that they are perfectly clean.
CAUTION
While topping up, never exceed the
“MAX” level, otherwise the fluid will flow
out of the tank while the engine is running.
◆ Top up with coolant, see p. 77 (LUBRICANT CHART) until reaching approx. the
“MAX” notch.
◆ Put back the filling cap (1).
CAUTION
In case of excessive consumption of coolant and in case the tank remains empty,
make sure that there are no leaks in the
circuit. Have it repaired by an aprilia Official Dealer.
◆ Put back the front cover, see p. 50
(REMOVING THE FRONT COVER).
use and maintenance SR 50
27
Some types of tyres homologated for this
vehicle are provided with wear indicators.
There are several kinds of wear indicators.
For more information on how to check the
wear, contact your Dealer.
Visually check if the tyres are worn and
in this case have them changed.
If the tyres are old, even if not completely
worn out, they may become hard and may
not ensure good road holding.
In this case, have the tyres changed.
TYRES
This vehicle is provided with tubeless tyres.
WARNING
Periodically check the tyre inflation pressure at room temperature, see p. 73
(TECHNICAL DATA).
If the tyres are hot, the measurement is
not correct. Carry out the measurement
especially before and after long rides.
If the inflation pressure is too high, the
ground unevenness cannot be dampened
and is therefore transmitted to the handlebar, thus compromising the driving
comfort and reducing road holding during turns.
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SR 50
If, on the contrary, the inflation pressure
is too low, the tyre sides (1) are under
greater stress and the tyre itself may slip
on the rim or it may become loose, with
consequent loss of control of the vehicle.
In case of sudden braking the tyres could
even get out of the rims. Further, the vehicle could skid while turning.
Check the surface and the wear of the
tyres, since tyres in bad conditions can
impair both the grip and the controllability of the vehicle.
Change the tyre when it is worn out or in
case of puncture on the tread side, if the
puncture is larger than 5 mm.
After repairing a tyre, have the wheels balanced.
The tyres must be replaced with other
tyres of the type and model recommended
by the manufacturer, see p. 73 (TECHNICAL DATA); the use of tyres different from
those prescribed may adversely affect the
manoeuvrability of the vehicle.
Do not install tyres with air tube on rims
for tubeless tyres and viceversa.
2
3
Make sure that the tyres always have their
valve sealing (2) caps on, to prevent them
from suddenly going flat.
Change, repair, maintenance and balancing operations are very important and
should be carried out by qualified technicians with appropriate tools.
For this reason, it is advisable to have the
above mentioned operations carried out
by an aprilia Official Dealer or by a qualified tyre repairer.
If the tyres are new, they may still be covered with a slippery film: drive carefully
for the first miles. Do not oil the tyres with
unsuitable fluids.
AUTOMATIC
LIGHT SWITCHING VERSION
front: .............................................. 1,5 mm
rear: ............................................... 1,5 mm
The vehicles provided with the Automatic
Switch-on Device can be immediately recognized, since the lights come automatically
on as soon as the engine is started.
For this reason the light switch has been replaced with a dimmer switch “
”.
The lights can be switched off only by stopping the engine.
However, the minimum tread depth must not
be less than prescribed by regulations in
force in the country where the vehicle is used.
◆ Before starting the vehicle, make sure that
the dimmer switch is in position “ ” (front
low beam).
MINIMUM TREAD DEPTH LIMIT (3)
use and maintenance SR 50
29
CATALYTIC SILENCER
WARNING
Avoid parking the vehicle catalytic version near dry brush wood or in places
easily accessible to children, as the catalytic silencer becomes extremely hot during use; be very careful and avoid any
kind of contact before it has completely
cooled down.
The catalytic vehicle is fitted with a silencer
with metal catalytic converter of the “platinum- rhodium bivalent” type.
This device provides for the oxidation of the
CO (carbon monoxide) and of the HC
(unburned hydrocarbons) contained in the
exhaust gases, changing them into carbon
dioxide and steam, respectively.
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use and maintenance
SR 50
Due to the catalytic reaction, the high temperature reached by the exhaust gases
makes for the burning of the oil particles, thus
keeping the silencer clean and eliminating
the exhaust fumes.
EXHAUST SILENCER
To have the catalytic converter function correctly and for long and to reduce possi-ble
problems regarding the soiling of the thermal unit and of the exhaust, it is necessary
to avoid covering long distances with the
engine running at constantly low rpm.
Owners are warned that the law may prohibit:
- the removal or rendering inoperative by
any person, other than for purposes of
maintenance, repair or replacement, of
any device or element of design incorporated into any new vehicle for the purpose
of noise control prior to its sale or delivery
to the ultimate purchaser or while it is in
use; and
- the use of the vehicle after such device or
element of design has been removed or
rendered inoperative by any person.
It is sufficient to alternate these periods with
periods in which the engine runs at relatively
high rpm, even if only for a few seconds, but
rather frequently.
What has been stated above assumes particular importance for the cold starting of the
engine: in this case, in order to reach a rpm
regime sufficient to enable the “priming” of
the catalytic reaction, just make sure that the
temperature of the thermal unit has reached
at least 50°C, which generally occurs a few
seconds after starting the engine.
CAUTION
Do not use leaded petrol, since it causes
the destruction of the catalytic converter.
WARNING
Tampering with the noise control system
is prohibited.
Check the exhaust silencer and the silencer
pipes, making sure that there are neither
signs of rust, nor holes and that the exhaust
system works effectively.
If the noise produced by the exhaust system
increases, immediately contact your aprilia
Official Dealer.
INSTRUCTIONS FOR USE
WARNING
Before departure, always carry out a preliminary checking of the vehicle, to make
sure that it functions correctly and safely,
see the following table PRELIMINARY
CHECKING OPERATIONS.
The non-performance of these checking
operations can cause severe personal
injuries or damages to the vehicle.
For the tightening of nuts and screws
whose driving torque is not indicated in
this Use and Maintenance Manual, contact an aprilia Official Dealer. The tightening of a component at the wrong driving torque may be dangerous for your and
other people’s safety.
Do not hesitate to consult your aprilia
Official Dealer in case there is something
you do not understand about the functioning of some controls or in case you
suspect or discover some irregularities.
It does not take long to carry out a checkup and this operation ensures you much
more safety.
PRELIMINARY CHECKING OPERATIONS
Component
Disc brakes
Accelerator
2 stroke oil
Wheel / tyres
Brake levers
Steering
Centre stand,
side stand
Fastening elements
Fuel tank
Coolant
Engine stop switch ( ) (in the countries
where required)
Lights, warning lights,
injection warning light
, horn and
electric devices
Injection pump
Check
Page
Check the functioning, the fluid level and make sure there are
no leaks. Check the wear of the pads.
Top up, if necessary.
Make sure that it works smoothly and that it is possible to open
and close it completely, in all steering positions. If necessary,
adjust and/or lubricate it.
Check and/or top up, if necessary.
Check the tyre surface, the inflation pressure, wear and tear
and any damage.
Remove any foreign matter that may be stuck in the tread
grooves.
Make sure that they work smoothly.
If necessary, lubricate the articulations.
Make sure that the steering rotates smoothly, without any clearance or slackening.
Make sure that they work smoothly and that the spring tension
brings it back to its normal position. If necessary, lubricate joints
and hinges.
Make sure that the fastening elements are not loose.
If necessary, adjust or tighten them.
Check the fuel level and top up, if necessary.
Make sure there are no leaks or occlusions in the circuit.
The coolant level in the expansion tank must be included between the “MIN” and “MAX” markings.
Top up, if necessary.
Make sure that it functions correctly.
Check the proper functioning of all the devices.
Change the bulbs or intervene in case of failure.
Check operation.
24, 25, 48
58
23
28
24, 25,48
51
57
—
21
26,27
17
64 ÷ 72
16
use and maintenance SR 50
31
1
time, wait ten seconds and press the start
push button “ ” again.
1
CAUTION
6
3
5
2
4
STARTING
WARNING
Exhaust gases contain carbon monoxide,
which is extremely noxious if inhaled.
Avoid starting the vehicle in closed or
badly-ventilated rooms.
The non-observance of this warning may
cause loss of consciousness or even lead
to death by asphyxia.
Do not get on the vehicle for the starting.
ELECTRIC STARTING
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Make sure that the light switch (1) is in
position “ • ”.
Make sure that the dimmer switch (2)
◆
is in position “ ”.
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use and maintenance
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◆ Rotate the key (3) and move the ignition
switch to position “ ”.
◆ Move the engine stop switch (4) to position “ ”, (in the countries where required).
◆
Ensure that the “injection check”
warning light goes out (see page 16).
◆ Lock at least one wheel, by pulling a brake
lever (5).
If this operation is not carried out, the start
relay receives no current and therefore the
engine does not start.
NOTE After a long period of inactivity, carry
out the operations described at p. 33
(STARTING AFTER A LONG PERIOD OF
INACTIVITY).
NOTE To avoid the excessive wear of the
battery, do not keep the start push button
“ ” pressed for more than five seconds. If
the engine does not start within this lapse of
◆ Press the start push button “ ” (6) without accelerating, then release it as soon
as the engine starts.
When the start push button “ ” is
pressed, the 2 stroke oil reserve warning
light “
” comes on. With the engine in
running condition, when the start push
button “ ” is released, the 2 stroke oil
reserve warning light “
” must go out;
if this does not occur, top up the 2 stroke
oil tank, see p. 23 (2 STROKE OIL).
If the “injection check” warning light
comes on after the engine has started,
stop the vehicle and contact an aprilia
Official Dealer.
Avoid pressing the start push button “ ”
(6) when the engine is running, since you
may damage the starter.
NOTE After starting the engine (in particular at very low temperatures), wait 15-20 seconds without accelerating, in order to allow
the engine to warm up.
◆ Do not accelerate and pull the brake levers at the same time until you move off.
To leave, see p. 34 (DEPARTURE AND
DRIVE).
CAUTION
Do not push down the kick starter with
the engine on.
8
7
KICK START
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND). Move to the left side of
the vehicle.
◆ Make sure that the light switch (1) is in
position “•”.
Make sure that the dimmer switch (2)
◆
is in position “ ”.
◆ Rotate the key (3) and move the ignition
switch to position “ ”.
◆ Move the engine stop switch (4) to position “ ”, (in the countries where required).
◆ To avoid losing control of the vehicle during the starting, lock both wheels by
putting on the brake levers (5).
◆ Push down the kick starter (7) with your
right foot, releasing it immediately.
◆ If necessary, repeat the operation until the
engine starts.
STARTING
WITH FLOODED ENGINE
If the starting is not carried out properly or if
there is too much fuel in the intake ducts and
in the carburettor, the engine may get
flooded.
To clean a flooded engine:
Press the start push button “ ” (6) for a few
seconds (letting the engine spin over) with
completely open throttle (8) (Pos. A).
STARTING WITH COLD ENGINE
When the room temperature is low (near or
below 0°C), it may be difficult to start the
engine at the first attempt.
In this case:
◆ Keep the start push button “ ” (6)
pressed for five seconds and at the same
time rotate the throttle grip (8) moderately
(Pos. A).
If the engine starts.
◆ Release the throttle grip (8).
◆ If the idling is unstable, twist the throttle
grip (8) slightly and frequently.
To leave, see p. 34 (DEPARTURE AND
DRIVE).
If the engine does not start.
Wait a few seconds and repeat the STARTING WITH COLD ENGINE procedure.
◆ If necessary, remove the spark plug, see
p. 59 (SPARK PLUG) and make sure that
it is not wet.
◆ If the spark plug is wet, clean and dry it.
Before reinstalling it:
NOTE Put a clean cloth on the cylinder,
near the spark plug seat, in order to protect
it from oil sprays.
◆ Press the start push button “ ” (6) and
let the starter run for about five seconds
without accelerating.
STARTING
AFTER A LONG PERIOD OF INACTIVITY
After a long period of inactivity, if the start is
not immediate, this may be due to the fact
that the fuel circuit is partially empty.
In this case:
◆ Press the start push button “ ” (6) for
about five seconds, in order to ensure the
filling of the float chamber.
use and maintenance SR 50
33
DEPARTURE AND DRIVE
NOTE Before departure, carefully read the
“safe drive” chapter, see p. 5 (SAFE DRIVE).
CAUTION
If the low fuel warning light “ ” positioned on the dashboard comes on while
the vehicle is running, this means that the
fuel reserve is being used.
Provide for topping up as soon as possible, see p. 21 (FUEL).
WARNING
Any mention to the use of the vehicle with
passenger is to be intended as referred
only to the countries where this is allowed.
WARNING
If you drive without passenger, make sure
that the passenger footrests are folded.
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use and maintenance
SR 50
While riding, keep your hands on the grips
and your feet on the footrests.
NEVER RIDE IN ANY POSITION OTHER
THAN THOSE INDICATED.
If you drive with a passenger, instruct him/
her so that he / she does not create problems during manouvres.
Before leaving, make sure that the stand/
stands is / are completely up.
To leave:
◆ Release the throttle grip (Pos. A), put on
the rear brake, then move the vehicle
down the stand.
◆ Get on the vehicle, keeping at least one
foot on the ground in order not to lose
balance.
◆ Adjust the inclination of the rear-view mirrors correctly.
WARNING
With the vehicle at rest, try to get acquainted with the use of the rear-view
mirrors.
◆ To leave, release the brake lever and accelerate by gently rotating the throttle grip
(Pos. B); the vehicle will start moving.
CAUTION
Do not start off abruptly when the engine
is cold.
To reduce the emission of polluting substances and the consumption of fuel,
warm the engine up by proceeding at low
speed for the first miles.
WARNING
Avoid opening and closing the throttle repeatedly and continuously, so that you do
not accidentally lose control of the vehicle.
Before beginning to turn, slow down or
brake driving at moderate and constant
speed or accelerating slightly; avoid braking at the last moment: it would be very
easy to skid.
If the brakes are operated continuously
on downhill stretches, the friction material may overheat, thus reducing the braking efficiency. Exploit the engine compression by putting on both brakes intermittently.
Never drive downhill with the engine off!
WARNING
If you have to brake, close the throttle and
put on both brakes in order to obtain uniform deceleration, properly exerting pressure on the braking parts.
By putting on the front brake only or the
rear brake only, you reduce the braking
force considerably, thus running the risk
of locking one wheel and consequently
losing grip.
If you stop uphill, decelerate completely
and use the brakes only to keep the vehicle steady.
Using the engine to keep the vehicle stationary can overheat the clutch and the
variator.
WARNING
In case of wet road or scarce wheel grip
(snow, ice, mud, etc.), drive slowly, avoiding sudden brakings or manoeuvres that
could make you lose grip and fall down.
Pay the utmost attention to any obstacle
or variation of the road surface.
Uneven roads, rails, manhole covers, indications painted on the road surface,
building site metal plates become rather
slippery by rain. For this reason all these
obstacles have to be carefully avoided,
driving smoothly and bending the vehicle as little as possible.
WARNING
Always use the direction indicators in
time when you intend to change lane or
direction, avoiding sharp and dangerous
movements.
Switch off the direction indicators as soon
as you have changed direction.
Be extremely careful when you overtake
other vehicles or are overtaken.
In case of rain, the water cloud created
by big vehicles reduces visibility; the air
shift may make you lose control of the
vehicle.
WARNING
If the 2 stroke oil reserve warning light
“
” comes on during the normal functioning of the engine, this means that the
2 stroke oil reserve is being used; in this
case, top up the 2 stroke oil tank, see p.
23 (2 STROKE OIL).
CAUTION
If the pointer of the coolant temperature
indicator “ ” reaches the red area, stop
the engine and check the coolant level,
see p. 26 (COOLANT).
use and maintenance SR 50
35
RUNNING-IN
WARNING
After the first 500 km (312 mi), carry out
the checking operations indicated in the
column “After running-in” of the REGULAR SERVICE INTERVALS CHART, see p.
40, in order to avoid hurting yourself or
other people and/or damaging the vehicle.
The running-in of the engine is primary to
ensure its correct functioning and its correct
functioning. If possible, drive on hilly roads
and/or roads with many bends, so that the
engine, the suspensions and the brakes
undergo a more effective running-in.
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use and maintenance
SR 50
For the first 500 km (312 mi), keep to the
following indications:
◆ 0-100 km (0-62 mi)
During the first 100 km (62 mi) put on the
brakes with caution, avoiding sharp and
prolonged brakings. This ensures a correct bedding-in of the pads on the brake
disc.
◆ 0-300 km (0-187 mi)
Do not keep the throttle grip open more
than one half for long stretches.
◆ 300-500 km (187-312 mi)
Do not keep the throttle grip open more
than three-fourths for long stretches.
1
2
3
STOPPING
PARKING
WARNING
If possible, avoid stopping abruptly, slowing down suddenly and braking at the last
moment.
◆ Release the throttle grip (Pos. A) and
gradually put on the brakes to stop the
vehicle.
◆ In case of a brief stop, keep at least one
brake on.
CAUTION
WARNING
Park the vehicle on firm and flat ground,
to prevent it from falling down.
Neither lean the vehicle against walls, nor
lay it on the ground.
Make sure that the vehicle and especially
its red-hot parts do not represent a danger for persons and children.
Do not leave the vehicle unattended when
the engine is on or the key is inserted into
the ignition switch.
Do not sit on the vehicle when the stand
is down.
◆ Stop the vehicle, see beside (STOPPING).
◆ Move the engine stop switch (1) to position “ ” (for the countries where required).
With stopped engine and ignition switch
in position “ ”, the battery may run
down.
◆ Rotate the key (2) and move the ignition
switch (3) to position “ ”.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
CAUTION
It is not necessary to close the fuel tap
when the engine is off, since it is equipped
with an automatic closing system.
CAUTION
Never leave the key in the ignition switch.
◆ Lock the steering, see p. 18 (STEERING
LOCK) and extract the key (2).
use and maintenance SR 50
37
1
1
2
2
POSITIONING THE
VEHICLE ON THE STAND
Carefully read p. 37 (PARKING).
CENTRE STAND
◆ Grasp the left handgrip and the left rear
grab rail (1).
◆ Push down the stand lever (2).
SIDE STAND
◆ Grasp the left handgrip and the left rear
grab rail (1).
WARNING
Danger of fall or overturning.
When the vehicle is straightened from the
parking position to the driving position,
the stand goes automatically up.
◆ Push down the side stand with your right
foot, extending it completely.
◆ Incline the vehicle until the stand rests on
the ground.
◆ Steer the handlebar completely left-wards.
WARNING
Make sure that the vehicle is stable.
38
use and maintenance
SR 50
SUGGESTIONS TO PREVENT
THEFT
NEVER leave the ignition key inserted and
always use the steering lock.
Park the vehicle in a safe place, possibly in
a garage or a protected place.
If possible, use the appropriate aprilia
, or an ad“Body-Guard” armored cable
ditional anti-theft device.
Make sure that all documents are in order
and the road tax has been paid.
Write down your personal data and telephone
number in the space provided in this page,
to facilitate the identification of the owner in
case of finding after theft.
SURNAME: ................................................
NAME: ........................................................
ADDRESS: .................................................
...................................................................
TELEPHONE NO.: .....................................
IMPORTANTE Very often stolen vehicles are identified thanks to the data written
on the use/maintenance manual.
MAINTENANCE
WARNING
Risk of fire.
Keep fuel and other flammable substances away from the electrical components.
Before beginning any maintenance operation or any inspection of the vehicle, stop
the engine, extract the key from the ignition block, wait until the engine and the
exhaust system have cooled down and if
possible lift the vehicle by means of the
proper equipment, on firm and flat
ground.
Before proceeding, make sure that the
room in which you are working is properly ventilated.
WARNING
Keep away from the red-hot parts of the
engine and of the exhaust system, in order to avoid burns.
Do not hold mechanical pieces or other
parts of the vehicle with your mouth: the
components are not edible and some of
them are noxious or even toxic.
CAUTION
If not expressly indicated otherwise, for
the reassembly of the units repeat the disassembly operations in reverse order.
In case any maintenance operation has
to be carried out, it is advisable to use
latex gloves.
Normally, the routine maintenance operations can be performed by the user; however, in some cases the use of specific tools
and technical expertise may be required.
If you need assistance or technical advice,
consult your aprilia Official Dealer, who can
ensure you prompt and accurate servicing.
Ask your aprilia Official Dealer to test the
vehicle on the road after a repair or periodic
maintenance operation.
In any case, personally carry out the “Preliminary checking operations” after any maintenance operation, see p. 31 (PRELIMINARY
CHECKING OPERATIONS).
use and maintenance SR 50
39
REGULAR SERVICE INTERVALS CHART
OPERATIONS TO BE CARRIED OUT BY THE aprilia Official Dealer (WHICH CAN BE CARRIED OUT EVEN BY THE USER)
Components
After running-in
[500 km
(312 mi)]
Every 4000 km
(2500 mi)
or 12 months
Battery / electrolyte level
C
Spark plug
C
S
Carburettor - idling
R
C
C
Air cleaner
C
P
Throttle operation
C
C
Light system
C
C
Stop light switches
C
Brake fluid (check level)
C
2 stroke oil
every 500 Km (312 mi):C
2 stroke oil
every 2000 Km (1240 mi):C
Wheels, tyres and inflating pressures
Front and rear brake pad wear
Every 8000 km
(5000 mi)
or 24 months
every month: C
C
every 2000 km (1250 mi): C
C = check and clean, adjust, lubricate or change, if necessary; P = clean; S = change; R = adjust.
Carry out the maintenance operations more frequently if you use the vehicle in rainy and dusty areas or on uneven ground.
40
use and maintenance
SR 50
OPERATIONS TO BE CARRIED OUT BY THE aprilia Official Dealer
Components
After running-in
[500 km
(312 mi)]
Every 4000 km
(2500 mi)
or 12 months
Every 8000 km
(5000 mi)
or 24 months
Rear shock absorber
Controls and transmission cables
Drive belt
C
C
S
Drive belt
Steering bearings and steering
every 6000 km (3720 mi): S
C
C
C
C
Wheel bearings
Brake discs
C
Piston rings
every 12000 km (7440 mi): C
General vehicle operation
C
Brake systems/discs
C
Cylinder cooling system
C
every 2 years: S
Coolant
every 2000 km (1240 mi): C / every 2 years: S
Silencer / exhaust
C
C
Fork oil and oil seal
Transmission oil
C
every 20000 km (12400 mi): P (outside cleaning)
Brake fluid
Mixer / accelerator operation
C
C
every 12000 km (7440 mi): C
S
Rear pulley pins
every 4000 km (2500 mi)
every 12000 km (7440 mi)
o 12 months: C
o 2 years: S
every 12000 km (7440 mi): S
Fixed movable front pulley
Fixed movable front pulley
every 12000 km (7440 mi): S
every 6000 km (3720 mi): S
use and maintenance SR 50
41
Components
After running-in
[500 km
(312 mi)]
Every 4000 km
(2500 mi)
or 12 months
Injector cleaning
every 16000 km (9920 mi): P
Front variator needle rollers and guides
Front variator needle rollers and guides
every 6000 km (3720 mi): S
Every 8000 km
(5000 mi)
or 24 months
S
Wheels, tyres and inflating pressure
C
Tightening of nuts and bolts
C
C
2 stroke oil reserve warning light
C
C
Fuel pipe
C
every 4000 km (2500 mi): C / every 2 years: S
Braking system pipe
every 4000 km (2500 mi): C / every 4 years: S
2 stroke oil pipe
C
Clutch wear
C
every 2 years: S
C
C = check and clean, adjust, lubricate or change, if necessary; P = clean; S = change; R = adjust.
Carry out the maintenance operations more frequently if you use the vehicle in rainy and dusty areas or on uneven ground.
42
use and maintenance
SR 50
3
2
4
1
IDENTIFICATION DATA
It is a good rule to write down the frame and
engine numbers in the space provided in this
manual.
The frame number can be used for the purchase of spare parts.
NOTE The engine number is stamped on
the rear side, near the rear brake adjuster.
ENGINE NUMBER
The engine number (1) is stamped on the
rear side of the vehicle, near the rear brake
adjuster.
FRAME NUMBER
The frame number (2) is stamped on the
central tube of the frame. To be able to read
it, it is necessary to remove the cover (3).
Engine no. __________________________
NOTE The cover (3) can be inserted in one
direction only. The part provided with the tang
(4) is the lower part.
Frame no. ___________________________
use and maintenance SR 50
43
1
1
1
1
7
5
6
4
2
1
2
AIR CLEANER
Carefully read p. 39 (MAINTENANCE).
Check the conditions of the air cleaner and
clean it monthly or every 4000 km (2500 mi),
depending on the conditions in which the vehicle is used.
If the vehicle is used on dusty or wet roads,
the cleaning operations and any replacement
should be carried out more frequently.
To clean the filtering element it is necessary
to remove it from the vehicle.
REMOVAL
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
WARNING
Before carrying out the following operations, let the engine and the silencer cool
44
use and maintenance
SR 50
2
2
1
down until they reach room temperature,
in order to avoid burns.
◆ Unscrew and remove the three screws (1).
◆ Unscrew and remove the two screws (2).
CAUTION
Do not exert too much pressure during
the removal.
The filter case cover (3) remains connected to the pipe (4).
◆ Partially remove the filter case cover (3).
◆ Remove the grid (5).
◆ Remove the filtering element (6).
◆ Check:
- filtering element (6);
- filter case gasket (7);
and change them if necessary.
3
CLEANING
WARNING
Do not use petrol or inflammable solvents
to wash the filtering element, in order to
avoid fires or explosions.
◆ Wash the filtering element (5) with clean,
non-inflammable solvents or solvents with
high volatility point, then let it dry
thoroughly.
◆ Apply a filter oil or a thick oil (SAE 80W90) on the whole surface of the filtering
element, then squeeze it to eliminate the
oil in excess.
NOTE The filter must be well impregnated,
though not dripping.
4
1
3
FRONT WHEEL
DISASSEMBLY
Carefully read p. 39 (MAINTENANCE).
NOTE Prepare a 210 mm high support, the
base of which must measure 200 x 200 mm.
◆ Place the support under the vehicle and
a spongy cloth between them, so that the
front wheel can move freely and the vehicle cannot fall down.
WARNING
Make sure that the vehicle is stable.
7
2
◆ Lock the wheel pin (1) by means of an
hexagon spanner.
◆ Unscrew and remove the nut (2), taking
the washer.
NOTE Check the arrangement of the
speedometer drive (4) and of the spacer ring
(7), in order to be able to reassemble them
correctly.
Wheel pin-nut driving torque:
50 Nm (5.0 kgm).
◆ Loosen the two screws (3) of the wheel
pin clamp.
◆ Support the front wheel and extract the
wheel pin manually.
◆ Remove the wheel, carefully withdrawing
the disc from the brake caliper.
◆ Disconnect the odometer control (4).
Driving torque of the wheel pin clamp
screws: 12 Nm (1.2 kgm).
◆ Push the wheel pin (1), by carefully acting
on the threaded end and using a rubber
hammer if necessary.
use and maintenance SR 50
45
8
6
7
5
4
6
1
Carefully read p. 39 (MAINTENANCE).
CAUTION
While reassembling the wheel, be careful
not to damage the brake pipe, the disc
and the pads.
To reassemble the front wheel, proceed as
follows:
◆ Position the wheel between the fork rods.
Insert the disc between the brake caliper
pads.
◆ Position the odometer control tang (4) in
the suitable seat in the wheel hub.
◆ Insert the tooth (5) of the odometer control between the two antirotation pins (6)
positioned on the fork.
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use and maintenance
SR 50
2
3
◆ Insert the pin (1) from the right side of the
vehicle (direction of travel).
REASSEMBLY
7
CAUTION
The spacer (7) remains positioned in its
seat on the wheel; if it should come out
of its seat, position it correctly (see figure) without forcing the dust cover (8).
◆ Insert the spacer (7) ring between the hub
and the left fork rod.
◆ Insert the washer, lock the rotation of the
wheel pin (1) by means of an hexagon
spanner and screw and tighten the nut (2).
Wheel pin nut driving torque:
50 Nm (5.0 kgm).
◆ Remove the support from under the vehicle.
◆ With pulled front brake lever, press the
handlebar repeatedly, thrusting the fork
downwards. In this way the fork rods will
settle properly.
◆ Tighten the two screws (3) of the wheel
pin clamp.
Driving torque of the wheel pin clamp
screws: 12 Nm (1.2 kgm).
◆ Make sure that the following components
are not dirty:
- tyre;
- wheel;
- brake discs.
WARNING
After reassembly, pull the front brake lever repeatedly and check the correct functioning of the braking system.
Check the wheel centering.
Have the driving torques, centering and
balancing of the wheel checked by your
aprilia Official Dealer, in order to avoid
accidents that may be harmful for you
and/or other people.
3
2
6
4
5
REAR WHEEL
DISASSEMBLY
Carefully read p. 39 (MAINTENANCE).
◆ Remove the silencer, see p. 56 (REMOVING THE EXHAUST SILENCER).
◆ Remove the cover (1).
◆ Pull the rear brake lever (2) completely,
then put a small piece of cardboard (3) on
the grip and keep the rear brake lever
pulled by holding it against the grip by
means of a plastic band (4).
◆ Unscrew and remove the wheel nut (5)
and the washer.
NOTE Upon reassembly, change the wheel
nut (special type).
Wheel nut (5) driving torque:
110 Nm (11 kgm).
◆ Remove the plastic band (4) and take the
piece of cardboard (3).
◆ Release the rear brake lever.
◆ Remove the rear brake caliper (6), see p.
55 (REMOVING THE REAR BRAKE
CALIPERS).
◆ Withdraw the wheel.
NOTE Use aprilia Genuine Spare Parts
only.
◆ After reassembly, make sure that the
following components are not dirty:
- tyre;
- wheel;
- brake discs.
WARNING
After reassembly, pull the rear brake lever repeatedly and check the correct functioning of the braking system. Check the
wheel centering.
Have the driving torques, centering and
balancing of the wheel checked by your
aprilia Official Dealer, in order to avoid
accidents that may be harmful for you
and/or other people.
use and maintenance SR 50
47
WARNING
The excessive wear of the friction material would cause the contact of the pad
metal support with the disc, with consequent metallic noise and production of
sparks from the caliper; braking efficiency, safety and soundness of the disc
would thus be negatively affected.
◆ If the thickness of the friction material
(even of one pad only) has reduced to
about 1.5 mm, replace both pads.
CHECKING THE BRAKE PAD
WEAR
Carefully read p. 24 (BRAKE FLUID -recommendations), p. 25 (DISC BRAKES), p.
39 (MAINTENANCE).
Check the brake pad wear after the first 500
km (312 mi) and successively every 2000 km
(1250 mi).
The wear of the brake pads depends on the
use, on the kind of drive and on the road.
The wear will be greater when the vehicle is
driven on dirty or wet roads.
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use and maintenance
SR 50
WARNING
Check the wear of the brake pads especially before every trip.
To carry out a rapid checking of the wear of
the front pads, proceed as follows:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Remove the brake caliper cover (1).
◆ Carry out a visual check between brake
disc and pads.
WARNING
Have the pads changed by your aprilia
Official Dealer.
CHECKING THE STEERING
Carefully read p. 39 (MAINTENANCE).
Make sure that the vehicle is stable.
CHECKING
THE ENGINE FULCRUM AXIS
Occasionally check the steering slack.
◆ Shake the fork in the direction of travel.
Carefully read p. 39 (MAINTENANCE).
To check the steering it is necessary to:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
NOTE Prepare a 270 mm high support, the
base of which must measure 200 x 200 mm.
◆ Place the support under the vehicle and
a spongy cloth between them, so that the
front wheel can move freely and the vehicle cannot fall down.
WARNING
NOTE
Do not shake the fork excesively,
otherwise you may take in consideration the
movement of the stand, thus observing an
incorrect slack.
Repeat the previous operation more than
once.
◆ If you find that there is a considerable
slack, contact your aprilia Official Dealer
to restore the optimal steering conditions.
Periodically check the slack existing between
the engine pin bushings.
To carry out this operation, proceed as follows:
◆ Position the vehicle on the centre stand.
◆ Shake the wheel transversally with respect to the riding direction.
◆ If you find that there is a considerable
slack, contact your aprilia Official Dealer,
to restore the optimal operating conditions.
use and maintenance SR 50
49
3
4
2
1
6
5
6
REMOVING THE
COVER SUPPORT ELEMENT
Carefully read p. 39 (MAINTENANCE).
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Rotate the handlebar completely, unscrew
and remove the screws (1).
◆ Remove the cover support element (2).
NOTE Upon reassembly, fit the tangs correctly in the appropriate seats.
REMOVING THE
FRONT COVER
Carefully read p. 39 (MAINTENANCE).
◆ Remove the cover support element (2),
see beside (REMOVING THE COVER
SUPPORT ELEMENT).
◆ Rotate the handlebar completely, unscrew
and remove the screws (3).
CAUTION
Proceed with care.
Do not damage the tangs and/or their
seats.
Handle the plastic and painted components with care and avoid scraping or
damaging them.
◆ Remove the front cover (4), by pulling it
upwards.
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use and maintenance
SR 50
NOTE
Upon reassembly, correctly insert
the lower tang (5) and successively the four
side tangs (6) in their seats.
1
10
3
11
2
2
4
12
9
8
REMOVING THE LOWER
HANDLEBAR COVER
Carefully read p. 39 (MAINTENANCE).
◆ Remove the cover support element, see
p. 50 (REMOVING THE COVER SUPPORT ELEMENT).
NOTE Support the front part of the fairing
(1), to prevent it from accidentally falling
down.
◆ Unscrew and remove the two screws (2).
CAUTION
Handle the plastic or painted components
with care and avoid scraping or damaging them.
◆ Remove the front part of the fairing (1).
◆ Take the spacer (3).
◆ Unscrew and remove the screw (4).
◆ Rotate the handlebar completely rightwards, unscrew and remove the screw (5)
(with shorter diameter) and the screws (6)
(7) and (8).
7
5
NOTE Upon reassembly, fit the screws (5)
(with shorter diameter) in the relevant seats.
◆ Rotate the handlebar in central position,
withdraw the lower handlebar cover (9)
from the front and remove it.
PARTIAL REMOVAL OF THE
UPPER HANDLEBAR COVER
Carefully read p. 39 (MAINTENANCE).
◆ Remove the rear-view mirrors, see p. 53
(REMOVING THE REAR-VIEW MIRRORS).
◆ Remove the lower handlebar cover, see
beside (REMOVING THE LOWER HANDLEBAR COVER).
◆ Disconnect the two electric terminals
(10).
CAUTION
The upper handlebar cover (11) (complete
with switches, instruments and indicators) remains connected with the speedometer cable and with the electric cables,
which makes it impossible to remove it
completely.
Proceed with care in order to avoid damaging the components.
◆ Paying attention to the two switch connections (12), lift the upper handlebar cover
and rotate it forwards, then rest it on the
front shield.
NOTE Upon reassembly, when positioning the upper handlebar cover, pass the electric terminal cables (10) behind and under
the handlebar.
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51
1
9
2
8
5
3
6
3
7
10
4
6
REMOVING
THE RIGHT AND LEFT
INSPECTION COVERS
NOTE Carry out the following operations
on the side of the inspection cover to be removed.
Carefully read p. 39 (MAINTENANCE).
◆ Unscrew and remove the screw (4) and
the screw (5) of the rear part of the fairing.
NOTE Handle the painted components
with care and avoid scraping or damaging
them.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Remove the battery/tool kit compartment
cover (1), see p. 20 (BATTERY / TOOL
KIT COMPARTMENT).
◆ Remove the tool kit compartment (2).
◆ Unscrew and remove the two screws (3).
52
use and maintenance
SR 50
NOTE Upon reassembly, fit the screw (5)
(with shorter diameter) of the rear part of the
fairing in the relevant seat.
◆ Slightly raise the inspection cover (6), release it from the footrest and withdraw it
sidewards.
NOTE
Upon reassembly, insert the rear
part of the inspection cover in the rear part
of the fairing, making the seat (7) coincide
with the end of the rear part of the fairing (8).
NOTE In points (9) and (10) the left inspection cover must overlap the right inspection
cover.
If both inspection covers have been removed,
reassemble first the right and then the left
cover.
2
3
9
6
4
11
5
7
1
12
10
1
INSTALLING THE REAR
MUDGUARD EXTENSION
REMOVING
THE REAR-VIEW MIRRORS
Carefully read p. 39 (MAINTENANCE).
Carefully read p. 39 (MAINTENANCE).
◆ Raise the saddle, see p. 19 (UNLOCKING / LOCKING THE SADDLE).
◆ Take the rear mudguard extension (1) out
of the crash helmet/glove compartment
together with the screws and relevant nuts
provided for the fastening.
◆ Correctly insert the clip (2) in the appropriate seat (3).
◆ Position the rear mudguard extension (1)
inside the number plate holder support (4).
◆ Tighten the screw (5).
◆ Insert the three screws (6) and tighten the
relevant nuts (7).
8
◆ In the countries where required: working from the inner side of the number plate
holder, insert the bulb socket (8).
◆ Make sure that the rear mudguard extension (1) is positioned correctly.
The following information refers to one rearview mirror only, but is valid for both.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
NOTE Group the components of the left
and right rear-view mirrors separately.
◆ Remove the cover (9).
CAUTION
Hold the rear-view mirror (10), to prevent
it from accidentally falling down.
◆ Unscrew the screw (11).
◆ Remove the rear-view mirror (10).
◆ Remove the gasket (12).
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53
REMOVING
THE FRONT INNER SHIELD
Carefully read p. 39 (MAINTENANCE).
NOTE
Remove the key from the ignition
switch.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Unscrew and remove the two screws
(1).
◆ Remove the footrest mat (2).
◆ Unscrew and remove the two fastening
screws (3) of the bag hook.
◆ Remove the bag hook (4).
◆ Unscrew and remove the screw (5) with
the relevant washer.
◆ Unscrew and remove the three screws
(6).
◆ Unscrew and remove the screw (7).
CAUTION
Proceed with care.
Do not damage the tangs and/or their
seats.
Handle the painted components with care
and avoid scraping or damaging them.
◆ Withdraw and remove the front inner
shield, rotating it toward the saddle.
54
use and maintenance
SR 50
3
4
6
5
6
3
6
2
7
1
1
2
1
1
REMOVING THE REAR BRAKE
CALIPERS
Carefully read p. 39 (MAINTENANCE).
WARNING
A dirty disc soils the pads, with consequent reduction of the braking efficiency.
Dirty pads must be replaced, while dirty
discs must be cleaned with a high-quality degreaser.
The use of the vehicle with damaged rims
is dangerous for the rider, other people
and the vehicle itself. Check the conditions of the rim and have it changed if it
is damaged.
CAUTION
While disassembling and reassembling
the wheel, be careful not to damage the
brake pipes, the discs and the pads.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Turn the wheel manually, so that the brake
caliper is positioned in correspondence
with the space between two spokes.
◆ Unscrew and remove the two screws (1).
Brake caliper screw driving torque:
27 Nm (2.7 kgm).
◆ When refitting, smear screws (1) with
Loctite 243.
CAUTION
Do not operate the brake lever after removing the brake caliper, otherwise the
pins may go out of their seats and cause
brake fluid leakages. In this case consult
your aprilia Official Dealer, who will carry
out the proper maintenance operation.
◆ Remove the brake caliper (2), by carefully
withdrawing it from the brake disc.
CAUTION
After reassembly, pull the front brake lever repeatedly and check the correct functioning of the braking system.
NOTE
Upon reassembly of the brake
caliper, replace the caliper fastening screws
(1) with two new screws of the same type.
use and maintenance SR 50
55
1
7
3
2
4
9
8
10
5
2
B
A
6
REMOVING THE REAR
MUDGUARD
Carefully read p. 39 (MAINTENANCE).
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
WARNING
Before carrying out the following operations, let the engine and the silencer cool
down until they reach room temperature,
in order to avoid burns.
◆ Unscrew and remove the screw (1).
◆ Unscrew and remove the screw (2), taking the washer.
◆
Remove the filter casing air intake
strap and pull it off to gain access to screw
(2).
Unscrew and remove screw (2).
◆
Tightening torque for screws (1) and (2):
7 Nm (0.7 kgm)
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use and maintenance
SR 50
NOTE Upon reassembly, take care to position the bushing (3) correctly.
◆ Unscrew and remove the screw (4).
Screw (4) driving torque:
25 Nm (2.5 kgm).
NOTE Upon reassembly, take care to position the bushing (5) correctly.
◆ Unscrew and remove screw (6).
Tightening torque for screw (6):
27 Nm (2.7 kgm)
CAUTION
When removing and refitting the rear
mudguard, take care not to damage the
throttled body.
◆ Remove the rear mudguard (7).
REMOVING THE EXHAUST
SILENCER
Carefully read p. 39 (MAINTENANCE).
◆ Remove the rear mudguard, see beside
(REMOVING THE REAR MUDGUARD).
◆ Unscrew and remove the screw (8).
Screw (8) driving torque:
10 Nm (1.0 kgm).
◆ Unscrew and remove the nut (9).
Nut (9) driving torque:
10 Nm (1.0 kgm).
◆ Unscrew and remove the screw (10) that
fastens the silencer to the engine.
Screw (10) driving torque:
27 Nm (2.7 kgm).
◆ Remove the silencer.
NOTE Upon reassembly, change the exhaust manifold-silencer seal.
4
1
1
2
CHECKING THE STAND
Carefully read p. 39 (MAINTENANCE).
WARNING
FOR THE SIDE STAND ONLY
.
Danger of fall or overturning.
When the vehicle is straightened from the
parking position to the driving position,
the stand goes automatically up.
NOTE
The following information refers to
one stand only, but is valid for both.
The stand (1) must rotate without hindrances.
2
Carry out the following checks:
◆ The springs (2) must not be damaged,
worn, rusty or weakened.
◆ The stand must rotate freely, if necessary
grease the joint, see p. 77 (LUBRICANT
CHART).
CHECKING THE SWITCHES
Carefully read p. 39 (MAINTENANCE).
The vehicle is provided with two switches:
◆ stoplight switch on the rear brake control
lever (3);
◆ stoplight switch on the front brake control
lever (4).
3
To reach the switches, proceed as follows:
◆ Remove the lower handlebar cover, see
p. 51 (REMOVING THE LOWER HANDLEBAR COVER).
Periodically carry out the following checks:
◆ Make sure that there are no dirt or mud
deposits on the switch; the pin must be
able to move without interferences, returning automatically to its initial position.
◆ Make sure that the cables are connected
correctly.
CAUTION
If you notice irregularities in the operation or if the help of a qualified technician is necessary, contact your aprilia
Official Dealer.
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◆ Start the engine.
◆ Make sure that the light switch is in position “ ”.
The minimum speed of the engine (idling)
1500 ±
must be about 1300 ± 100 rpm,
50 rpm; in this case the engine does not
make the rear wheel rotate.
If necessary:
NOTE The vehicle can be fitted with different carburettor and throttled body models.
For the positioning of the adjuster, see the
figure.
2
1
IDLING ADJUSTMENT
(carburettor version only)
Carefully read p. 39 (MAINTENANCE).
Adjust the idling after the first 500 km (312
mi) and every time it is irregular.
To carry out this operation, proceed as follows:
◆ Drive for a few miles until the engine
reaches the normal running temperature,
then stop the engine.
◆ Remove the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the tool kit compartment.
◆ Connect an electronic revolution counter
to the spark plug cable.
WARNING
Before proceeding, make sure that the
room in which you are working is properly ventilated.
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◆ Act on the adjusting screw (1) positioned
on the carburettor.
NOTE Do not act on the air adjusting screw
(2), to avoid variations of the carburation
setting.
By SCREWING IT (clockwise), you increase
the engine rpm.
By UNSCREWING IT (anticlockwise), you
decrease the engine rpm.
◆ Twist the throttle grip, accelerating and
decelerating a few times to make sure that
it functions correctly and to check if the
idling speed is constant.
NOTE If necessary, contact your aprilia
Official Dealer.
ADJUSTING
THE ACCELERATOR CONTROL
Carefully read p. 39 (MAINTENANCE).
3
5
4
The ideal slack of the accelerator control
should be about 2-3 mm.
To adjust the slack, proceed as follows:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Remove the protection element (3).
◆ Loosen the nut (4).
◆ Act on the adjuster (5), positioned at the
beginning of the accelerator control cable.
After the adjustment:
◆ Tighten the nut (4), thus locking the adjuster (5) and put back the protection element (3).
WARNING
After the adjustment, make sure that the
rotation of the handlebar does not modify
the engine idling rpm and that the throttle grip returns smoothly and automatically to its original position after being
released.
1
SPARK PLUG
Carefully read p. 39 (MAINTENANCE).
Check the spark plug after the first 500 km
(312 mi), and successively every 4000 km
(2500 mi) or 12 months.
Periodically remove the spark plug and clean
it carefully, removing carbon deposits;
change it if necessary.
To remove and clean the spark plug:
WARNING
Before carrying out the following operations, let the engine and the exhaust silencer cool down until they reach room
temperature, in order to avoid burns.
Take off the spark plug cap (1).
◆ Remove all the dirt from the base of the
spark plug, then unscrew it with the spanner you will find in the tool kit and extract
it from its seat, taking care that neither dust
nor other substances enter the cylinder.
◆ Make sure that there are neither carbon
deposits, nor corrosion marks on the electrode and on the central porcelain part; if
necessary, clean them with the special
cleaners for spark plugs, with an iron wire
and/ or a metal brush.
◆ Energetically blow some air, in order to
prevent the removed residues from getting into the engine. If the spark plug has
crackings on the insulating material, corroded electrodes or excessive deposits,
it must be changed.
◆ Check the spark plug gap with a thickness
gauge. The gap must be 0.6 - 0.7 mm,
0.9 mm; if necessary adjust it, carefully bending the earth electrode.
◆ Make sure that the washer is in good conditions. With the washer on, screw the
spark plug by hand in order not to damage the thread.
◆ Tighten the spark plug by means of the
spanner you will find in the tool kit, giving
it half a turn to compress the washer.
Spark plug driving torque:
20 Nm (2.0 kgm).
CAUTION
The spark plug must be well tightened,
otherwise the engine may overheat and
be seriously damaged.
Use the recommended type of spark plug
only, see p. 73 (TECHNICAL DATA), in order not to compromise the life and performance of the engine.
◆ Position the spark plug cap (1).
◆ Put back the inspection cover.
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during the recharging.
BATTERY
KEEP AWAY FROM CHILDREN.
Carefully read p. 39 (MAINTENANCE).
WARNING
Risk of fire.
Keep fuel and other flammable substances away from the electrical components.
The electrolyte in the battery is toxic and
caustic and if it gets in contact with the
skin it can cause burns, since it contains
sulphuric acid. Wear protection clothes,
a face mask and/or goggles during maintenance operations.
In case of contact with the skin, rinse with
plenty of water.
In case of contact with the eyes, rinse with
plenty of water for fifteen minutes, then
consult an oculist without delay.
If the electrolyte is accidentally swallowed, drink a lot of water or milk, then
continue drinking milk of magnesia or
vegetable oil and consult a doctor without delay.
The battery gives off explosive gases;
keep it away from flames, sparks, cigarettes and any other source of heat.
During the recharging or the use, make
sure that the room is properly ventilated
and avoid inhaling the gases released
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Do not incline the vehicle too much, in
order to avoid dangerous leaks of the
battery fluid.
CAUTION
Never invert the connection of the battery
cables.
Connect and disconnect the battery with
the ignition switch in position “ ”, otherwise some components may be damaged.
Connect first the positive cable (+) and
then the negative cable (–).
Disconnect following the reverse order.
The electrolyte is corrosive.
Do not pour or spill it, especially on the
plastic parts.
MAINTENANCE-FREE
BATTERIES
WARNING
Carefully read page 39 (MAINTENANCE).
Fire hazard.
Never keep fuel and other flammable substances close to the electrical components.
Never invert the battery cable connections.
Always connect and disconnect the battery with the ignition switch in the “ ”
position.
First connect the positive (+) cable and
then the negative (–) cable.
Use the reverse order when disconnecting.
IMPORTANTE The vehicle is equipped
with a maintenance-free battery. No maintenance is required apart from occasional
checking and, if necessary, recharging.
LONG INACTIVITY
OF THE BATTERY
If the vehicle remains unused for more than
fifteen days, it is necessary to recharge the
battery, in order to prevent its sulphation, see
p. 63 (RECHARGING THE BATTERY) :
◆ Remove the battery, see p. 61 (REMOVING THE BATTERY) and put it in a cool
and dry place.
It is important to check the charge periodically (about once a month), during the winter or when the vehicle remains unused, in
order to prevent the deterioration of the battery.
◆ Recharge it completely with a normal
charge, see p. 63 (RECHARGING THE
BATTERY).
If the battery remains on the vehicle, disconnect the cables from the terminals.
REMOVING THE BATTERY
2
3
Carefully read p. 60 (BATTERY).
1
4
CHECKING AND CLEANING
THE TERMINALS
Carefully read p. 60 (BATTERY).
◆ Remove the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the tool kit compartment (1).
◆ Make sure that the cable terminals (2) and
the battery terminals (3) are:
- in good conditions (and not corroded or
covered with deposits);
- covered with special grease or Vaseline.
If necessary:
◆ Make sure that the ignition switch is in position “ ”.
◆ Disconnect first the negative (–) and then
the positive cable (red) (+).
◆ Brush with a wire brush to eliminate any
sign of corrosion.
◆ Reconnect first the positive (red) (+) and
then the negative cable (–).
◆ Cover the terminals with special grease
or Vaseline.
After these operations:
◆ Put back the tool kit compartment (1).
◆ Put back the battery / tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the tool kit compartment (1).
◆ Make sure that the ignition switch is in position “ ”.
◆ Disconnect first the negative (–) and then
the positive cable (red) (+).
◆ Remove the battery breather pipe (4) (only
for batteries that need maintenance).
◆ Remove the battery from its compartment
and put it on a flat surface, in a cool and
dry place.
WARNING
Once it has been removed, the battery
must be stored in a safe place and kept
away from children.
◆ Put back the tool kit compartment (1).
◆ Put back the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
CAUTION
Never disconnect the battery while the
engine is running.
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INSTALLING THE BATTERY
Carefully read p. 60 (BATTERY).
◆ Remove the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the tool kit compartment.
◆ Put the battery in its container.
◆ Connect the breather pipe (only for batteries that need maintenance).
CAUTION
Always connect the battery breather pipe,
to prevent the sulphuric acid vapours
from corroding the electric system,
painted parts, rubber elements or gaskets
when they exit the breather pipe itself.
The breather pipe must be connected in
such a way as not to be squashed, otherwise it may cause a pressure increase
inside the battery, with the risk of damaging it.
◆ Connect, in order, the positive (red) ( + )
and negative ( – ) cable.
◆ Cover the terminals with special grease
or Vaseline.
◆ Put back the tool kit compartment.
◆ Put back the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
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CHECKING
THE ELECTROLYTE LEVEL
(ONLY FOR BATTERIES THAT
NEED MAINTENANCE)
NOTE The following text is valid ONLY if
the installed battery needs maintenance.
CAUTION
Top up with distilled water only. Do not
exceed the “MAX” mark, since the electrolyte level increases during the recharge.
◆ Top up by adding distilled water.
Carefully read p. 60 (BATTERY).
◆ Remove the battery from its compartment,
see p. 61 (REMOVING THE BATTERY).
◆ Make sure that the fluid level is included
between the two “MIN” and “MAX”
notches stamped on the battery side. Otherwise:
◆ Unscrew and remove the element plugs.
CAUTION
After topping up, put back the element
plugs in the correct position.
◆ Put back the element plugs.
RECHARGING THE BATTERY
(ONLY FOR BATTERIES THAT
NEED MAINTENANCE)
Carefully read p. 60 (BATTERY).
◆ Remove the battery from its compartment,
see p. 61 (REMOVING THE BATTERY).
◆ Unscrew and remove the element plugs.
◆ Check the electrolyte level, see p. 62
(CHECKING THE ELECTROLYTE
LEVEL).
◆ Connect the battery with a battery charger.
◆ A recharge with an amperage equal to 1/
10 th of the battery capacity is recommended.
◆ After the recharging operation, check the
electrolyte level again and if necessary top
up with distilled water.
◆ Replace the element plugs.
CAUTION
WARNING
Reassemble the battery only 5-10 minutes
after disconnecting the recharger, since
the battery continues to produce gas for
a short lapse of time.
During the recharging or the use, make
sure that the room is properly ventilated
and avoid inhaling the gases released
during the recharging.
RECHARGING THE BATTERY
◆ Connect the battery with a battery charger
(ONLY FOR “MAINTENANCE-FREE” BATTERIES)
Carefully read p. 60 (BATTERY).
NOTE Do not remove the battery plugs:
without plugs the battery may be damaged.
WARNING
Reassemble the battery only 5/10 minutes
after disconnecting the recharge apparatus, since the battery continues to produce gas for a short lapse of time.
◆ Remove the battery, see p. 61 (REMOVING THE BATTERY).
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LOCATION OF FUSES
2
1
CHANGING THE FUSES
Carefully read p. 39 (MAINTENANCE).
CAUTION
Do not repair faulty fuses. Never use
fuses different from the recommended
ones.
The use of unsuitable fuses may damage
the electric system or, in case of short
circuit, may even cause a fire.
NOTE If a fuse blows frequently, there
probably is a short circuit or an overload in
the electric system.
In this case it is advisable to consult an
aprilia Official Dealer.
If an electric component does not work or
works irregularly, or if the engine fails to start,
it is necessary to check the fuses.
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To carry out the checking:
◆ Turn the ignition switch to position “ ”,
to avoid any accidental short circuit.
◆ Remove the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
◆ Remove the tool kit compartment.
◆ Extract the fuses one by one and check if
the filament is broken.
◆ Before replacing a fuse, try to find out the
cause of the trouble, if possible.
◆ Then replace the damaged fuse with a
new one having the same amperage.
NOTE If you use one of the spare fuses,
put a new fuse in the appropriate seat.
◆ Put back the tool kit compartment.
◆ Put back the battery/tool kit compartment
cover, see p. 20 (BATTERY / TOOL KIT
COMPARTMENT).
7.5A fuse (1) - From key switch to:
- stop light and relevant circuit;
- 2 stroke oil reserve sensor and relevant circuit;
- fuel level sensor and relevant circuit;
- coolant thermistor circuit;
- CDI circuit;
- direction indicators and relevant circuit;
- horn.
10A fuse (2) - From battery to:
- voltage regulator;
- ignition switch/steering lock;
- thermal switch;
- PTC.
LOCATION OF FUSES
7.5 A fuse (1) - From ignition switch to:
- turn indicator system
- horn
- fuel level system
- water temperature gauge
- oil level indicator
15 A fuse (2) - From battery to:
- injection system
- battery recharge system
- starting system
- engine stop lights
1
3
ADJUSTING THE VERTICAL
HEADLIGHT BEAM
NOTE To check the direction of the headlight beam, specific procedures must be
adopted, in accordance with the regulations
in force in the country where the vehicle is
used.
Italian standard:
To rapidly check the correct direction of the
beam, place the vehicle on flat ground, 10 m
away from a wall.
Turn on the low beam, sit on the vehicle and
make sure that the beam projected on the
wall is slightly under the horizontal line of the
headlight (about 9/10th of the total height).
NOTE
For the versions
it is not
necessary to remove the front cover.
◆ Remove the front cover, see p. 49 (REMOVING THE FRONT COVER).
◆ Act on the suitable screw (1) by means of
a screwdriver.
◆
Act on the suitable screw (2) by
means of a screwdriver.
By TURNING IT CLOCKWISE, you set the
beam upwards.
By TURNING IT ANTICLOCKWISE, you
set the beam downwards.
BULBS
Carefully read p. 39 (MAINTENANCE).
WARNING
CAUTION
Before changing a bulb, position the vehicle on the centre stand, move the ignition switch to position “ ” and wait a
few minutes, so that the bulb cools down.
Change the bulb wearing clean gloves or
using a clean and dry cloth.
Do not leave fingerprints on the bulb,
since these may cause its overheating
and consequent breakage.
If you touch the bulb with bare hands,
remove any fingerprint with alcohol, in
order to avoid any damage.
DO NOT FORCE THE ELECTRIC CABLES.
Risk of fire.
Keep fuel and other flammable substances away from the electrical components.
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5
2
4
1
CHANGING THE
HEADLIGHT BULBS
Carefully read p. 64 (BULBS).
The headlight contains:
- two low beam bulbs.
use and maintenance
CHANGING THE
HEADLIGHT BULBS
Carefully read p. 65 (BULBS).
The headlight contains:
– one low/high beam bulb (5).
To change the bulbs, proceed as follows:
◆ Remove the front inner shield, see p. 54
(REMOVING THE FRONT INNER
SHIELD).
◆ Move the protection element (1) with your
hands.
◆ Rotate the check tang (2) positioned behind the bulb socket anticlockwise.
◆ Extract the bulb and replace it with a new
one of the same type.
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LOW / HIGH BEAM BULB
To change the bulb, proceed as follows:
◆ Remove the front inner shield, see p. 54
(REMOVING THE FRONT INNER
SHIELD).
◆ Move the protection element (3) with your
hands.
◆ Rotate the bulb socket (4) anticlockwise
and extract it.
◆ Press the bulb (5) slightly and rotate it
anticlockwise.
◆ Extract the bulb (5) from its seat.
◆ Correctly install a new bulb of the same
type.
5
◆ Remove the coloured screen (4).
◆ Press the bulb (5) slightly and rotate it anticlockwise.
◆ Extract the bulb from its seat.
4
6
7
NOTE
3
1
2
Insert the bulb in the bulb socket,
making the two bulb pins coincide with the
relevant guides on the socket.
◆ Correctly install a new bulb of the same
type.
9
8
CHANGING THE FRONT
DIRECTION INDICATOR
BULBS
Carefully read p. 65 (BULBS).
To change the bulbs:
NOTE The following information refers to
one direction indicator only, but is valid for
both.
◆ Unscrew and remove the screw (1).
CAUTION
Proceed with care.
Do not damage the tangs and/or their
seats.
◆ Remove the protection screen (2).
◆ Unscrew and remove the screw (3).
CAUTION
For the reassembly:
NOTE Upon reassembly, correctly position
the protection screen (2) in its seat.
Do not invert the position of the screws (1)
and (3).
CAUTION
Tighten the screw (1) and the screw (3)
moderately and with great care, in order
to avoid damaging the protection screen
(2) and the coloured screen (4).
CHANGING THE REAR
DIRECTION INDICATOR
BULBS
Carefully read p. 65 (BULBS).
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
NOTE Before changing a bulb, check the
fuse, see p. 64 (CHANGING THE FUSES).
◆ Unscrew and remove the screw (6).
While removing the protection
screen, proceed carefully in order not to
break the cog.
NOTE
◆ Remove the protection screen (7).
NOTE Upon reassembly, correctly position
the protection screen in its seat.
Tighten the screw (6) moderately and carefully, to avoid damaging the protection
screen.
◆ Press the bulb (8) slightly and rotate it anticlockwise.
◆ Extract the bulb (8) from its seat.
A focal lens is positioned in the inner part
of the coloured screen; take care not to
invert the right and left screen.
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67
NOTE
Insert the bulb in the bulb socket,
making the two bulb pins coincide with the
relevant guides on the socket.
16
17
◆ Correctly install a new bulb of the same
type.
NOTE If the bulb socket (9) goes out of its
seat, insert it correctly, making the bulb
socket opening coincide with the screw seat.
14
10
CHANGING
THE DASHBOARD BULBS
Carefully read p. 65 (BULBS).
NOTE Before changing a bulb, check the
fuses, see p. 64 (CHANGING THE FUSES).
The dashboard contains:
– the warning light bulbs;
– the dashboard lighting bulbs.
WARNING LIGHT BULBS
NOTE Extract the bulb sockets one by one,
in such a way as to avoid positioning them
incorrectly during the reassembly.
◆ Extract the relative bulb socket:
Pos.
10
To change the bulbs:
Carefully read p. 65 (BULBS).
11
12
12
13
14
Warning light
Direction
indicators (
2 stroke
oil reserve (
Low
beam ( )
High beam (
Low
fuel ( )
Injection check
Colour
)
)
)
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SR 50
12
13
15
DASHBOARD LIGHTING BULBS
NOTE Extract the bulb sockets one by one,
in such a way as to avoid positioning them
incorrectly during the reassembly.
◆ Extract the bulb socket of the dashboard
part in which there has been a light decrease:
green
red
Pos.
Lit part
green
15
Upper right part
blue
16
Upper left part
amber
17
Lower right part
red
◆ Extract the bulb and replace it with one of
the same type.
68
11
◆ Extract the bulb and replace it with one of
the same type.
2
2
2
6
3
1
1
4
1
5
CHANGING
THE REAR LIGHT BULB
Carefully read p. 65 (BULBS).
Only for the rear stoplight:
NOTE Before changing a bulb, check the
fuse, see p. 64 (CHANGING THE FUSES)
and the effective operation of the stop-light
switches, see p. 57 (CHECKING THE
SWITCHES).
The rear light comprises two units. Each unit
contains:
- one parking light bulb (1);
- one stoplight bulb (2).
To change them, proceed as follows:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Unscrew and remove the screw (3).
NOTE
While removing the protection
screen, proceed carefully in order not to
break the cog.
◆ Remove the protection screen (4).
◆ For the stoplight bulb (2) only, slightly
press the bulb and rotate it anticlockwise.
◆ Remove the bulb from its seat.
NOTE Insert the bulb in the socket, making the two bulb pins coincide with the relevant guides on the socket.
◆ Correctly install a new bulb of the same
type.
CAUTION
CHANGING
THE NUMBER PLATE BULB
(in the countries where required)
Carefully read p. 65 (BULBS).
CAUTION
To extract the bulb socket, do not pull the
electric wires.
◆ Working on the inner lower side of the
number plate holder, grasp the bulb socket
(5), pull it and extract it from its seat.
◆ Withdraw the bulb (6) and replace it with
a new one of the same type.
Upon reassembly, correctly position the
protection screen in its seat.
Tighten the screw (3) carefully, without
exerting too much pressure, in order to
avoid damaging the protection screen.
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TRANSPORT
WARNING
Before transporting the vehicle, it is necessary to empty the fuel tank and the carburettor completely, see below (DRAINING THE FUEL TANK) making sure that
both are completely dry.
During transport the vehicle must be kept
in vertical position and be firmly anchored, in order to avoid any leakage of
fuel, oil or coolant.
WARNING
In case of failure, do not tow the vehicle, but
ask for assistance.
DRAINING THE
FUEL TANK
(carburettor version only)
Carefully read p. 21 (FUEL).
WARNING
Risk of fire.
Wait until the engine and the exhaust silencer have completely cooled down.
Fuel vapours are noxious for your health.
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Before proceeding, make sure that the
room in which you are working is properly ventilated.
Do not inhale fuel vapours.
Do not smoke, nor use free flames.
2
1
DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Stop the engine and wait until it has cooled
down.
◆ Remove the rear mudguard (see page 56,
REMOVING THE REAR MUDGUARD).
◆ Prepare a container with capacity exceeding the fuel quantity present in the tank
and put it on the ground on the left side of
the vehicle.
◆ Remove the fillercap.
◆ Empty the fuel tank by means of a manual
pump or a similar system.
After draining the tank, put back the filler
cap in the correct position.
To drain the carburettor completely, proceed
as follows:
◆ Put the free end of the pipe (1) into a receptacle.
◆ Open the carburettor outlet by loosening
the drain screw (2) positioned under the
float chamber.
When all the fuel has flowed out of the carburettor:
◆ Tighten the drain screw (2) completely.
WARNING
WARNING
◆ Put back the filler cap.
Tighten the drain screw (2) with care, to
avoid fuel leakages from the carburettor
during the refuelling.
If necessary, contact an aprilia Official
Dealer.
CLEANING
Clean the vehicle frequently if it used in particular areas or conditions, such as:
◆ Polluted areas (cities and industrial areas).
◆ Areas characterized by an high percentage of salinity and humidity (sea areas,
hot and humid climates).
◆ Particular conditions (use of salt and antiice chemical products on the roads during the winter).
◆ Avoid leaving deposits of industrial and
polluting powders, tar spots, dead insects, bird droppings, etc. on the body.
◆ Avoid parking the vehicle under trees,
since in some seasons residues, resins,
fruits or leaves fall down, which contain
substances that may damage the paint.
WARNING
After the vehicle has been washed, its
braking functions could be temporarily
impaired because of the presence of water on the grip surfaces. Calculate long
braking distances to avoid accidents.
Brake repeatedly to restore normal conditions.
Carry out the preliminary checking operations, see p. 31 (PRELIMINARY CHECKING OPERATIONS).
To remove dirt and mud from the painted
surfaces use a low- pressure water jet, carefully wet the dirty parts, remove mud and filth
with a soft car sponge impregnated with a
lot of water and shampoo (2 ÷ 4% parts of
shampoo in water).
Then rinse with plenty of water and dry with
chamois leather.
To clean the outer parts of the engine use a
degreaser, brushes and wipers.
CAUTION
To clean the lights, use a sponge soaked
with water and a neutral detergent, rubbing the surfaces delicately and rinsing
frequently with plenty of water.
Polish with silicone wax only after having carefully washed the vehicle. Do not
wash the vehicle under the sun, especially
during the summer, when the body is still
warm, since if the shampoo dries before
being rinsed away, it can damage the
paint.
Do not use liquids at a temperature exceeding 40°C to clean the plastic components of the vehicle.
Do not direct high-pressure water or air
jets or steam jets on to the following components: wheel hubs, controls on the
right and left side of the handlebar, bearings, brake pumps, instruments and indicators, exhaust pipes, glove/tool kit
compartment, ignition switch/steering
lock, radiator wings, fuel cap, lights and
electric connections.
Do not use alcohol or solvents to clean
the rubber and plastic parts and the saddle: use water and mild soap.
WARNING
Do not apply protection waxes onto the
saddle, in order not to make it too slippery.
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LONG PERIODS OF INACTIVITY
Precautions are needed to avoid the adverse
effects of prolonged inactivity.
Further, it is important to carry out the necessary repairs and a general check up before the period of inactivity, since you could
forget to carry them out later.
Proceed as follows:
◆ Remove the battery (see page 61, REMOVING THE BATTERY, and page 60,
LONG INACTIVITY OF THE BATTERY).
◆ Wash and dry the vehicle, see p. 71
(CLEANING).
◆ Polish the painted surfaces with wax.
◆ Inflate the tyres, see p. 28 (TYRES).
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◆ By means of a suitable support, position
the vehicle so that both tyres are raised
from the ground.
◆ Place the vehicle in an unheated, not-humid room, away from sunlight, with minimum temperature variations.
◆ Position and tie a plastic bag on the final
pipe of the exhaust silencer, in order to
prevent moisture from getting into it.
◆ Cover the vehicle avoiding the use of plastic or waterproof materials.
AFTER A PERIOD OF INACTIVITY
◆ Uncover and clean the vehicle, see p. 71
(CLEANING).
◆ Check the charge of the battery, see p.
63 (RECHARGING THE BATTERY) and
install it, see p. 62 (INSTALLING THE
BATTERY).
◆ Refuel, see p. 21 (FUEL).
◆ Carry out the preliminary checking operations, see p. 31 (PRELIMINARY CHECKING OPERATIONS).
WARNING
Have a test ride at moderate speed in a
low-traffic area.
TECHNICAL DATA
Description
Max. length
(rear mudguard extension included)
DIMENSIONS
Max. width
Max. height (front part of the fairing included)
Seat height
Distance between centres
Min. ground clearance
Weight ready for starting
Type
Model
Model
ENGINE
Number of cylinders
Total displacement
Bore / stroke
Compression ratio
Starting
Starting
1775 mm
720 mm
1200 mm
820 mm
1265 mm
160 mm
106 Kg
Two-stroke engine
ABLC/L02
ABLI/L01
1
49.38 cm3
41.0 mm / 37.4 mm
13.2 ± 0.5 : 1
electric + kick starter
electric
Engine
idle
1300 ± 100 rpm
Engine
idle
1500 ± 50 rpm
Clutch
Change gear
Cooling
automatic, centrifugal, dry clutch
automatic stepless variator
liquid cooled
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73
Description
Fuel (reserve included)
Fuel reserve
Transmission oil
2 stroke oil (reserve included)
2 stroke oil reserve
CAPACITY
Coolant
Seats
Vehicle max. load
(driver + luggage)
Vehicle max. load
(driver + passenger + luggage)
Speed change gear
Primary
TRANSMISSION Ratios
– minimum for stepless change
– maximum for stepless change
Secondary
MODEL
CARBURETTOR – standard
Choke tube
FUEL SYSTEM, MODEL
ELECTRONIC FUEL – type
INJECTION
Choke
8l
2l
130 cm3
1.6 l
0.5 l
1,2 l (50% antifreeze + 50% water)
n° 1 (2 in the countries where this is allowed)
105 Kg
180 Kg (in the countries where this is allowed)
automatic and stepless
V-belt
2.9
0.75
with gears
KEIHIN
Ø 12 mm
ELECTRONIC FUEL INJECTION
Ø 18 mm
FUEL SUPPLY
Fuel
unleaded petrol according to the DIN 51607 standard, min. O.N. 95
(N.O.R.M.) and 85 (N.O.M.M.)
FRAME
Type
one beam split in two at the rear
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use and maintenance
SR 50
Description
SUSPENSIONS
Front
Stroke
Rear
Stroke
hydraulically operated telescopic fork
90 mm
hydraulic mono-shock absorber
72 mm
BRAKES
Front
Rear
disc brake, Ø190 mm with hydraulic transmission
disc brake, Ø190 mm with hydraulic transmission
Type
alloy
3.50 x 13”
3.50 x 13”
WHEEL RIMS
TYRES
Front
Rear
Type
FRONT
REAR
tubeless
130/60 - 13” - 53J
130/60 - 13” - 53J
STANDARD INFLATION PRESSURE
Front
Rear
180 kPa (1.8 bar)
200 kPa (2.0 bar)
INFLATION PRESSURE WITH PASSENGER
(in the countries where this is allowed)
IGNITION
Front
Rear
180 kPa (1.8 bar)
220 kPa (2.2 bar)
Type
C.D.I.
Type
T.C.I.
14° ± 1° before P.M.S.
Spark advance
Spark advance
variable 20° a 3000 rpm
17° a 7500 rpm
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75
Description
SPARK PLUG
ELECTRIC
SYSTEM
Standard
Standard
– alternative
Spark plug gap
Spark plug gap
Battery
Fuses
Fuses
Generator
(with permanent magnet)
Generator
(with permanent magnet)
Low beam
Low / high beam
BULBS
Direction indicators
Rear parking light
Stoplight
Dashboard lighting
High beam
High beam
WARNING
LIGHTS
Direction indicators
2 stroke oil reserve
Low fuel
Injection Check
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SR 50
NGK R BPR7HS
NGK R CPR8-E
NGK R BPR8HS
0.6 - 0.7 mm
0.9 mm
12 V - 4 Ah
7.5 A - 10 A
7.5 A - 15 A
12 V - 115 W
12 V - 140 W
12 V - 15 W
12 V - 35/35 W
12 V - 10 W
12 V - 5 W
12 V - 10 W
12 V - 1.2 W
12 V - 1.2 W
12 V - 1.2 W
12 V - 2 W
12 V - 2 W
12 V - 1.2 W
12 V - 2 W
LUBRICANT CHART
Transmission oil (recommended):
F.C., SAE 75W - 90 or
GEAR SYNTH, SAE 75W - 90.
As an alternative to the recommended oil, it is possible to use high-quality oils with characteristics in compliance with or superior to the A.P.I.
GL-4 specifications.
Mixer oil (recommended):
GREEN HIT 2 or
CITY 2T.
As an alternative to the recommended oil, use high-quality oils with characteristics in compliance with or superior to the ISO-L-ETC++, A.P.I.
TC++ specifications.
Fork oil (recommended):
F.A. 5W or
F.A. 20W fork oil;
an alternative FORK 5W or FORK 20W fork oil.
If you need an oil with intermediate characteristics in comparison with the
20W, these can be mixed as indicated below:
F.A. 5W and
SAE 10W =
F.A. 5W 67% of the volume +
F.A. 20W 33% of the volume, or
FORK 5W 67% of the volume +
FORK 20W 33% of the volume;
SAE 15W =
F.A. 5W 33% of the volume +
F.A. 20W 67% of the volume, or
FORK 5W 33% of the volume +
FORK 20W 67% of the volume.
Bearings and other lubrication points (recommended):
AUTOGREASE MP or
F.A. 20W or
FORK 5W and
FORK
GREASE 30.
As an alternative to the recommended product, use high-quality grease for rolling bearings, working temperature range -30°C.... +140°C,
dripping point 150°C... 230°C, high protection against corrosion, good resistance to water and oxidation.
Protection of the battery poles: neutral grease or vaseline.
WARNING
Use new brake fluid only.
Brake fluid (recommended):
F.F., DOT 5 (DOT 4 compatible) or
BRAKE 5.1, DOT 5 (DOT 4 compatible).
WARNING
Use only antifreeze and anticorrosive without nitrite, ensuring protection at -35°C at least.
Engine coolant (recommended):
ECOBLU - 40°C or
COOL.
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Importers
78
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Importers
use and maintenance SR 50
79
WIRING DIAGRAM - SR 50
80
use and maintenance
SR 50
WIRING DIAGRAM KEY - SR 50
1) Generator
2) CDI
3) Spark plug
4) HT coil
5) Voltage regulator
6) Battery
7) Starter
8) Start relay
9) Front stoplight switch
10) Rear stoplight switch
11) 2 stroke oil reserve switch
12) Coolant thermistor
13) Fuel level sensor
14) Rear right direction indicator
15) Rear light
16) Rear left direction indicator
17) Light switch
18) Horn push button
19) Ignition switch/steering lock
20) Control diode
21) Start push button
22) Blinking
23) Dashboard
24) Direction indicator warning light
25) 2 stroke oil reserve warning light
26) Dashboard light
27) Fuel level instrument
28) Low fuel warning light
29) Low beam warning light
30) Coolant temperature instrument
31) Front right direction indicator
32) Front left direction indicator
33) Front parking light
34) Low beam bulb
35) Horn
36) Pick up
37) Fuses
38) Multiple connectors
39) Rear parking light
40) Rear stoplight
41) Direction indicator switch
42) Thermal switch
43) –
44) Anti-theft device installation point
45) PTC
CABLE COLOURS
Ar orange
Az light blue
B blue
Bi white
G yellow
Gr grey
M brown
N black
R red
V green
Vi violet
Ro pink
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81
WIRING DIAGRAM - SR 50 (with fuel-injection engine
)
10
3
+
-
C
7
+
-
8 9
C
B
Bi
V/R
Ar/N
14
15
38
G/R
V/G
B/N
V/R
Ar
R/N
Gr
V/R
18
L
B
38
19
17
16
38
G/R
Vi
13
38
B
Gr
2 4 3 1
B
Ar\N
Gr/V
38
3 4 12 5 6
R
Bi/B
Vi
Az
G
V/R
N
R/N
Vi
V/R
48
38
B
Bi
Gr/V
Ar/N
38
12
Ar
V/R
B
Ar
Gr/V
ON
OFF
LOCK
Ro
V
G
1
B/N
Az
R
V/R
B
Gr/V
R
Az
Vi
B
G
B
11
V/R
B
Bi/B
2
4 5 6
Az
B
20
Az
B
22
47
Bi
B
46
Az
V/G
G
B
R
Bi
B
Az
V/G
G
B
R
22
23
38
37
36
V
Ar/Bi
Ro
ARANCIO BIANCO
ARANCIO
35
32
SR 50
G
Ar
R
R
R
39
28
50
49
N
M
40
38
R
7.5 A
15 A
38
N
P
41
Ro
3
5
R/N
V/R
Ar
V
R/N
Bi/R
R/M
G/R
R/M
M
R/N
B/G
Bi/G
Ro
V/R
31
Ar
Ar/Bi
B
V
12
R
B
Bi
38
B
R/N
R/M
Ar
29
38
42
use and maintenance
R/N
V/G
R/N
V/G
34
G/R
B
33
R/N
V/R
Ar
Bi/Vi
43
82
24
38
26 25
R/M
Bi/Vi
Bi/R
V
R/M
Ro
R/N
M/G
Bi/G
B/G
20
Ar/N
21
22
B
R
G
V/R
Bi
M/G
Ro
Bi
G
44
B
M
G/R
N
Bi/B
B
Ar/N
V/R
R
B
45
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
30
BLU
VERDE
VISTO DAL LATO CHE
SI CONNETTE AL REGOLATORE
27
21
23
21
WIRING DIAGRAM KEY - SR 50
1) Oil level switch
2) Injection check warning light
3) Water temperature indicator
4) Direction indicator warning light
5) Oil reserve warning light
6) Dashboard light
7) Fuel level instrument
8) Lights ON warning light
9) Low fuel warning light
10) Dashboard
11) Fuel level sensor
12) Horn
13) Horn button
14) Ignition switch
15) Blinking
16) Direction indicator switch
17) Light switch
18) Start push button
19) Control diode
20) Rear left direction indicator
21) Rear light
22) Parking light bulb
23) Brake light bulb
24) Rear right direction indicator
25) Rear stoplight switch
26) Front stoplight switch
27) Generator
28) Voltage regulator
29) Start relay
30) Starter
31) Fuses
32) Battery
33) HT coil
34) Spark plug
35) Fuel pump
36) Air injector
37) Fuel injector
38) Multiple connectors
39) Oil pump
40) Temperature sensor
41) Pick up
42) Throttle sensor
43) Serial connection
44) Electronic control unit (ECU)
45) Front right direction indicator
46) Front parking light
47) Low beam bulb
48) Front left direction indicator
49) Resistor
50) Injection relay
CABLE COLOURS
Ar orange
Az light blue
B blue
Bi white
G yellow
Gr grey
M brown
N black
R red
V green
Vi violet
Ro pink
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83
WIRING DIAGRAM - SR 50
84
use and maintenance
SR 50
(liquid-cooled version
)
WIRING DIAGRAM KEY - SR 50
(liquid-cooled version
)
use and maintenance SR 50
85
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
86
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SR 50
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
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87
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
88
use and maintenance
SR 50
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
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NOTE
ASK FOR GENUINE SPARE PARTS ONLY
90
use and maintenance
SR 50
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
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NOTE
ASK FOR GENUINE SPARE PARTS ONLY
92
use and maintenance
SR 50
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
use and maintenance SR 50
93
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
94
use and maintenance
SR 50
NOTE
ASK FOR GENUINE SPARE PARTS ONLY
use and maintenance SR 50
95
aprilia s.p.a. wishes to thank its customers for the purchase of this vehicle.
- Do not dispose of oil, fuel, polluting substances and components in the
environment.
- Do not keep the engine running if it isn’t necessary.
- Avoid disturbing noises.
- Respect nature.
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SR 50