ADLY MOTO | ATV-300 | Service manual | ADLY MOTO ATV-300 Service manual

ADLY MOTO ATV-300 Service manual
SERVICE MANUAL
ATV-50/90/100 Ⅴ
October, 2002
High Power Engine
HER CHEE INDUSTRIAL CO., LTD.
Foreword
This service manual contains information on servicing ATV-50/90/100.
This manual is written for use as a guideline only. It is recommended that any
mechanic, with or without sufficient experience, thoroughly read through the
manual and only attempt to service those areas that are fully understood in
accordance with the guidelines provided by this manual. For fully qualified
mechanics, this manual supplies service data necessary for repairs and
maintenance. It is highly recommended that a qualified mechanic, regardless of
technical level, should study the service manual in full before attempting service
on ATV-50/90/100.
All the data and diagrams provided in this service manual are valid at the time of
publication. Information may be updated without notice due to improvements or
upgrades.
No quotation, reproduction, or reprint of the service manual, as a whole or in part,
will be permitted without the express written consent from JEHM Motorsports.
INDEX
Initial Set-Up Information-------------------------------------------------1
Information for Preparation-----------------------------------------------2
Check and Adjust----------------------------------------------------------3
EngineLubrication System---------------------------------------------------------4
Fuel System-----------------------------------------------------------------5
Remove of Engine----------------------------------------------------------6
Cylinder Head / Cylinder / Piston----------------------------------------7
Starter / Driving Disc / Clutch / Transmission Disc--------------------8
Final Transmission Mechanism-------------------------------------------9
Crank case / Crank shaft--------------------------------------------------10
ChassisFront wheel, Brake, Suspension------------------------------------------11
Rear heel, Brake, Suspension --------------------------------------------12
Electrical devices-----------------------------------------------------------13
Wiring diagram-------------------------------------------------------------14
Initial Set-Up Information
Injector Oil
Use a good grade of oil that is specially formulated for two-stroke engines, synthetic type is
recommended. JEHM recommends SAE 30.
Transmission Gear Oil
Use multi-grade motor oil of SAE 90 or 85W-140.
Break-In Procedure
To insure maximum durability and optimal performance and to avoid engine damage, please
pre-mix the first four tanks of fuel with two-stroke engine oil at 30:1 ratio.
Do not operate
the ATV at more than half throttle for the first three hours. During the break-in period (the
first four tanks of fuel), operate the vehicle at various RPM’s and do not operate the vehicle
above half throttle for extended periods.
Engine
The ATV-50/90/100 have a two-stroke, reed induction, piston port motor.
of two-cycle oil and should never be run without oil in the oil tank.
It requires the use
Extreme damage to the
motor will result.
Ignition System
The ignition system installed on ATV-50/90/100 is the Computerize Digital Ignition (CDI)
type. There is no maintenance required for this type of system.
Chassis
The chassis is constructed of mild steel tubing.
oxyacetylene welding can be used.
If any frame repairs are necessary,
If wire feed or arc welding is used, use extreme care and
disconnect the battery while welding.
1- 1
Set-Up Procedure
The following instructions provided a general overview of the procedures needed to properly
set-up and deliver the ATV-50/90/100 to the retail customer.
1. Take out the battery and fill with acid liquid. Pre-charging the battery will extend its life.
The preparation and charge procedure is based on the battery’s instruction.
2. Install the rear wheels and parts in the following order:
A. 14x40x4.5mm washer (big)
B. 14x26x3mm washer (small)
C. 14mm hex-bolt (torque 450-550kg-cm, 44-54N-m)
D. Cotter pin (open up the end after installed)
E. Rubber cap
3. Install the front wheels and parts in the following order:
A. 13x21x4mm washer (small)
B. 12x40x4.5mm washer (big)
C. 12mm hex-bolt (torque 300-350kg-cm, 29.5-34N-m)
D. Cotter pin (open up the end after installed)
E. Rubber cap
4. Set the handle bar into the lock-pin of the steering base.
Tie-up the 4 hex-socket bolts.
Install the rear cover into handle bar and adjust the cables and wires properly.
Install the
front cover into the rear cover.
5. Pull the seat-lock cable and remove the seat.
Install the battery with the red wire to
positive (+) and the black wire to the negative (-).
6. Remove the oil tank cap and fill with 2 stroke oil (SAE 30)of a synthetic and low-smoke
type, and enough unleaded gasoline to operate. Be sure the arrow mark on the fuel valve
arm (petcock) is set into the correct position (on).
7. Install the Front Bumper.
8. Turn on the main switch and try to start up the engine.
In order to use the electric starter,
you need to check the following.
A. Turn on the engine operation switch located on left handle bar
B. Pull the rear-brake lever
C. Push the electric starter bottom to left or right
9. If the vehicle is operating in a very dusty area, please add more oil on the air cleaner filter.
1- 2
PDI (PRE DELIVERY INSPECTION)
(For ATV-50/90/100)
□ 1. Record the frame and engine number into the owner’s manual.
□ 2. Check that all tires have correct pressure specified on the tire or in the owner’s manual.
□ 3. Engine lubrication oil (2 stroke, Grade SAE30) tank is filled.
□ 4. Battery is installed properly.
□ 5. All brake cables are adjusted properly.
□ 6. Fuel tank has enough gasoline to operate.
□ 7. Check the suspension and drive chain for proper setup.
□ 8. Check that all electrical components and lights are working properly.
□ 9. Make sure that the owner’s manual and tool bag are installed under the seat.
If there are any other questions, please check the owner’s manual for details.
CAUTION: Before install the front rim, beware the stopper of front brake plate assembly
must fit into the front knuckle 7-mm plate.
1- 3
INFORMATION FOR PREPARATION
Attention on Operation
z
All washers, oil rings, clamp rings, opening pins shall be duly replaced by a new item
when dismounted.
z
Locking of all screws, nuts, cross screws shall be performed in the order of first the
large screws and then the small ones and from inside to outside in opposite angles by
tightening the torque locks.
z
All items must use original parts, pure oil and greases.
z
All service shall use special tools and general tools to repair.
z
All dismounted items requiring for checks shall be duly cleaned and for assembly, all
items shall be duly lubricated.
2-1
INFORMATION FOR PREPARATION
Attention on Operation
z
Certified lubricants in cans shall be used on all the elements to be lubricated.
z
After assembly, performance of all elements shall be duly checked and the locking shall
be duly verified.
z
In case of an operation is performed by over 2 people, the assignment shall be
conducted in coordination and safety shall be the first priority.
z
Definition of signs:
The sign given in the Service Manual shall refer to the operation methods and
observation.
OIL: Lubrication by designated lubricant.
GREASE: Lubrication by grease
Special Tool: Parts on which special tools shall be used
Tool: General tools shall be used
New: Replace by new items after dismounting
Attention
Dangerous and important operations
2-2
INFORMATION FOR PREPARATION
MODEL
ENGINE
TYPE
STARTING
LUBRICATION
TRANSMISSION
SPARK PLUG
BATTERY
OIL CAPACITY
FUEL TANK
OVERALL LENGTH
OVERALL WIDTH
OVERALL HEIGHT
SEAT HEIGHT
WHEEL BASE
CLAIMED DRY WEIGHT
FRONT BRAKE
REAR BRAKE
FRONT SUSPENSION
REAR SUSPENSION
FRONT TIRE
REAR TIRE
SPECIFICATION
ATV-50
ATV-90
ATV-100
50 C.C.
90 C.C.
100 C.C.
AIR-COOLED, 2-STROKE SINGLE CYLINDER
KICK & ELECTRIC
OIL PUMP SEPARATE SUPPLY
AUTOMATIC (C.V.T. V-BELT)
NGK BP7HS
12V-4AH (Maintenance-free)
1.0 Liter
5.0 Liter
1465mm
875mm
890mm
700mm
1525mm
890mm
930mm
740mm
955mm
103KG
108KG
DOUBLE DRUM
DRUM
OIL DAMPED, INDEPENDENT, SINGLE A-ARM
OIL DAMPED, SWING SINGLE SHOCK
19*7-8(16*8-7)
19*7-8(16*8-7)
20*7-8
18*9.5-8
☆SPECIFICATIONS SUBJECT TO CHANGE WITHOUT ANY NOTICE. ☆
2-2
INFORMATION FOR PREPARATION
LOCKING TORQUE
Adopt the standard torque locking for the item unlisted.
STANDARD TORQUE:
Type
5 mm Screw
6 mm Screw
6 mm Hex Washer Face Bolt / Nut
8 mm Hex Washer Face Bolt / Nut
10 mm Hex Washer Face Bolt / Nut
Locking Torque (kg-m)
0.4
1.0
1.2
2.7
4.0
CHASSIS:
Locking Place
Front Wheel Axle Nut
Rear Axle Nut
Rear Brake Arm Screw
Front Shock Absorber
Rear Shock Absorber
Engine Mounting Nut – Front
Engine Mounting Nut – Rear
Quantity Dia. (mm) Locking Torque (kg-m)
1
12
3.5
1
14
5.0
1
6
1.2
4
10
4.0
2
10
4.0
1
10
4.5
1
8
3.0
ENGINE:
Locking Place
Quantity Dia. (mm) Locking Torque (kg-m)
Screw of Cylinder Cap
4
6
1.0
Flywheel Nut
1
10
3.8
Clutch Cover Nut
1
10
3.8
Clutch Carrier Nut
1
28
5.5
Nut of Primary Fix Sheave
1
10
3.8
Oil-check Screw
1
8
1.3
Joint Screw of Exhaust Muffler
2
6
1.2
Exhaust Pipe Support Screw of Muffler
1
8
3.0
Spark Plug
1
14
1.4
Bolt of Crank Shaft Case
6
6
1.0
2-4
INFORMATION FOR PREPARATION
The following drawing that shows the disassembling situation of the cover parts for ATV-50/90/100.
2-5
CHECK AND ADJUST
Way of Check & Adjustment
1. Mark “○” is checking time.
2. Mark “☆” is the regular exchange of service items.
This exchange time is just for general riding of the majority not for the special use , please
arrange with this principle according to the difference of the riding condition.
Service Time (month)
Service Items
Before
riding
1st
Judgement Standard
Remarks
Each each 12
6
Operating Device
Handle- Play, loose/tight
Operation
○
○
○
○
○
○
○
Wheels- Right/left turn round angle
Front and Rear Cushion – Damage
○
○
Installation of Bolt
○
○
○
○
Play
○
○
Handle , handle front
10-20 mm
○
○
○
○
○
○
Brake Device
Brake- Play
○
Test Ride
○
Adjust
○
Wires- Loose / tight and damage
Wore of brake & operating parts
○
Brake Hub.
○
(mm)
Front
Rear
85
130
85.5
130.7
Standard
diameter
Limitation
Riding Device
20×7-8
19×7.5-8
19×7-8
16×8-7
Normal
8 psi
10 psi
2.2 psi
4.5 psi
Max.
9 psi
11 psi
2.6 psi
5 psi
Min.
7 psi
9 psi
1.8 psi
4 psi
Tire
Size
Tires pressure
○
○
○
3-1
Service Time (month)
Service Items
Before
riding
1st
Judgement Standard
Remarks
Each each 12
6
Riding Device
Tire
Check & damage of tires
○
○
○
Ditch--- front wheel till 3 mm
Rear wheel till 3 mm
Abnormal & ditch in tires
○
○
○
Bolt & nut of tires locking
Blocking torque
○
○
Front wheel – 3.0~3.5 kg-m
Rear wheel – 4.5~5.5 kg-m
Tightness of front bearing
○
Tightness of rear bearing
○
Buffer device
Spring - damage
○
○
Suspension arm – damage of joint gap
○
○
○
○
○
○
○
○
○
○
○
○
Spring of shock absorber.
& arm
- oil leakage or damage
Tightness of installation
Power transmission device
Clutch
- action
○
Gear Box
SAE 90 or 85W-140
Electric device
Ignition device - Spark plug
Battery - connection of terminal
○
Wiring of electrical appliance – damage
○
Gap of spark plug 0.6~0.7 mm
or loose in connection place
Engine
○
○
○
○ Idle : 1800±100 rpm
exhaust
○
○
air filter
○
○
Body – starting & abnormal noise
Low speed & accelerating
○
3-2
Service Items
Service Time (month)
Before
riding
1st
○
○
Judgement Standard
Remarks
Each each 12
6
Lubrication device
Oil and oil filter
Oil leakage
○
○
○
○
Check the oil level
Fuel installation
○
Fuel filter is dirty / Clogged
○
Leakage of fuel
○
Throttle gate & choke
○
Alteration of tubes
○
Lights
○
Action
On/off normal , dirty , damage
○
○
Exhaust pipe & muffler
Installation loosed or damage
○
Function of muffler
○
Frame & body –loose or damage
○
Cleaning combustion chamber , exhaust
6Each 2 years
pipe , and carbon muck in muffler
DRIVE CHAIN
Check the tension of drive chain
Others
○
Tolerance: 10~20mm
○
- greasing of each part
Abnormal from previous day –confirm
normal
○
○
○
3-3
CHECK AND ADJUST
Disassembly of External Parts
z
Remove the external parts for check
and adjustment.
Disassembly the Rear Cover:
z Pull the Seat Releaser Unit and take
off Seat Ass’y.
z Remove 4 Pan Flat Head Phillips
Bolt.
z Remove 2 Ladder Bolt.
z Remove 4 Nylon Nut, 2 Plain Washer
and 2 Rubber Washer.
Remove Floor Panel:
z Remove 4 Pan Flat Head Phillips
Bolt.
Disassembly the Handle Bar:
z Remove 2 Tapping Screw Truss Head
Phillips and take off Front Handle
Bar Cover.
z Remove 2 Handle Grip.
z Remove 4 Hex Socket Bolt and take
off the Handle Bar.
z Release 1 Hex Socket Bolt and take
off the R. Lever Ass’y.
z Release 2 Pan Flat Head Phillips Bolt
and take off the L. Handle Switch
Ass’y.
z Release 1 Hex Socket Bolt and take
off the L. Lever Ass’y.
Disassembly the Front Cover:
z Disassembly the Handle Bar.
z Remove the Fuel Tank Cap.
z Pull the Seat Releaser Unit and take
off Seat Ass’y.
WARNNING:
z Remove 2 Ladder Bolt. and 4 Pan *Do not damage & break the cover.
Flat Head Phillips Bolt.
*Before locking screws, please confirm
z Remove 2 Hex Washer Face Bolt and
the matching is correct of all parts.
4 Plain Washer And 2 Hex Flange
Nut With Serration.
z
Disconnect Main Switch Wire and
head light wire.
3-4
z CHECK AND ADJUST
Adjustment of Oil Pump
*WARNNING:
Going on this operation after adjusting
and checking the guide wiring of throttle.
• The tolerance within 1 mm of the oil
pump control cable is good. Starting
the engine, push slightly the throttle
to feed oil. At same time of rising the
engine rotation, confirm the function
of control rod.
• The condition will be appeared with bad synchronizing as follows :
* Starting difficult and having smoke when opening degree of oil pump’s control
rod is too big.
* Piston will be burnt when the opening degree of oil pump’s control rod is too
small.
Adjustment of Drive Chain
z
z
z
z
Loose 4 Hex Bolts on Rear Brake Panel.
Adjust the drive chain adjuster to proper chain tolerance 10 ~ 20 mm (unload).
Tie up 4 Hex bolt on Rear Brake Panel.
Lubricate the chain.
CANTION: Beware the direction of chain fix clip if disassembly the chain.
3-5
LUBRICANT SYSTEM
Attention of Operation
z
z
z
z
Pay attention to avoid dust enter to the interior of engine and oil tube when
disassembly the oil pump.
Never disassembly oil pump.
Must draw out the air in the pump if there have air in the pump when
disassembly tube of carburetor.
After disconnect the oil tube, must fulfill the oil in the connection tube before
installation.
Diagnosis of Troubles
Too much smoke, means too much carbon muck piping up the spark plug.
z Poor synchronizing adjust of oil pump (too much exhaust gas).
z Bad quality of engine oil.
Overheating
z Poor synchronizing adjustment of oil pump (too exhaust gas).
z Bad quality of engine oil.
Piston burnt
z Short of engine oil, or engine oil tube is clogged.
z Poor adjustment of oil pump.
z Air in tube system or in oil pump.
z Bad oil pump.
Clogging oil from oil tank
z Vent of oil tank’s cap is blocked.
z Oil Filter is clogged.
Preparation standard
z Use separating engine oil appointed (use for 2-stroke).
z Oil tank capacity: 1.1 liter
4- 1
LUBRICANT SYSTEM
Disassembly of Motor Oil Pump
z
z
Remove Generator Cover.
Remove A.C.G. fly wheel and fly wheel base.
4WARNING:
Operating after cleaning motor oil pump around and no entering to the crank shaft
case.
4- 2
LUBRICANT SYSTEM
Operation / Parts Name
Disassembly
1 Fuel tube
Q’ty
Remarks
1 4WARNING:
Clogging the tube to avoid fuel flow out.
2 Fuel connection tube
3 Pan phillips bolt
1
2 • Remove from both side of oil pump.
4 Control cable
1 • Remove from oil pump.
5 Oil pump
Assembly
5→1
1
• Assembly with sequence in reverse
of disassembly.
4WARNING:
−Smear oil to new O ring ,before install
the oil pump into crank case.
−The oil pump must correctly installed
into crank case.
4WARNING:
−Don’t loosen adjusted screw on control
cable.
−Adjust the cable if it’s loose.
4- 3
LUBRICANT SYSTEM
Disassembly of Oil Tank
Operation / Parts Name
Disassembly
1 Hex Bolt
2 Joint of oil disassembly oil pipe
3 Oil tank
Assembly
3→1
Q’ty
Remarks
1 4WARNING:
1 Fill motor oil with clean container.
1
• Operation with sequence in reverse of
disassembly.
4WARNING:
Connect correct oil pipe after
assembly , release the air in motor oil
pump.
4- 4
FUEL SYSTEM
Attention in Operation
h Pay attention to the parts which using gasoline.
h Tube & Cable must be in accordance with the correct location.
h Release air in oil pump when disconnect oil tube.
Diagnosis of Trouble
No starting
h No gasoline in tank
h The arrow mark of Fuel valve pointed at “OFF” position
h Gasoline blocked
h Too much fuel in cylinder
h Air filter is clogged
Idle speed unstable , of carburetor rotation not smooth
h Poor idle speed adjustment of carburetor.
h Low compression pressure
h Poor ignition system
h Bad adjustment of air adjusting screw on carburetor
h Air filter is clogged
h Defect of auto side-plunger on carburetor
h Idle speed nozzle is clogged
Mixed air too thin
h Nozzle of carburetor is clogged
h Gasoline filter is clogged
h Vent of gasoline tank is clogged
h Gasoline tube cranked, broke, clogged
h Poor action of float chamber valve.
h Gasoline level too low
h Air pipe is clogged
Mixed air too rich
h Poor action of float chamber valve
h Gasoline level too high
h Air nozzle is clogged
h Auto side-plunger defect
5- 1
FUEL SYSTEM
Disassembly / Assembly Valve Of Throttle
h Disassembly carburetor.
Operation / Parts Name
1
2
3
4
5
6
7
8
9
10
11
Disassembly
Pan phillips bolt
Throttle valve
Throttle cable
Throttle valve spring
Gasket
Throttle cover
Rubber Sealing
Washer
Needle nozzle
Clamp
Adjust nut
Q’ty
Remarks
2
1
1
1
1 *WARNING:
1 Remove from guide wire of throttle
1 valve.
1
1
1
1
5- 2
FUEL SYSTEM
Operation / Parts Name
11
10
9
8
7
6
5
4
3
2
Assembly
Adjusted screw
Clamp
Needle nozzle
Washer
Sealing set of guide wire
Throttle cover
Washer
Throttle valve spring
Throttle cable
Throttle valve
1 Pan phillips bolt
Q’ty
1
1
1
1
1
1
1
1
1
1
1
Remarks
*WARNING:
Assembly of needle nozzle.
Assembly of throttle valve.
Assembly of throttle cable.
Aim the ditch of throttle valve to chamber,
then install throttle valve into
carburetor.
Lock the throttle cover.
5- 3
FUEL SYSTEM
Remove Carburetor
z
Turn the arrow of fuel valve pointed at “OFF”.
Operation / Parts Name
1
2
3
4
5
6
7
8
Disassembly
Throttle valve set
Gasoline tube
Engine oil tube
Auto-side plunger wire of carburetor
Vacuum pressure tube
Clip
Intake manifold hose clamp
Carburetor
Q’ty
Remarks
1
1
1
1
1
1
1
1
Assembly
8→1
3 Motor oil joint
*WARNING: Don’t let dust enter
into carburetor.
*WARNING: Release air.
5- 4
FUEL SYSTEM
Disassembly / Assembly Carburetor
h Disassembling of carburetor.
h Adjust the idle speed.
h Adjust the air adjust screw.
*WARNING:
․No fire.
․Before disassembling, loose fuel-draining screw, draining out the gasoline from
carburetor.
5- 5
FUEL SYSTEM
Operation / Parts Name
Q’ty
Remarks
Disassembly
Plunger starter
1 Pan phillips bolt
2 Auto-side plunger
3 Oil ring
2
1
1
Float Chamber
4
5
6
7
8
9
10
Pan phillips bolt
Drain screw
Over flow tube
Pan phillips bolt
Float pin
Float
Needle valve
4
1
1
1
1
1
1
Carburetor Ass’y
11
12
13
14
15
16
Throttle screw set
Air adjust screw set
Float chamber seal
Pilot jet
Main jet base
Main jet
Assembly
16→1
12 Air adjust screw set
1
1 *WARNING: Must confirm rotation
before disassembling.
Not locking too much, avoid to
1
hurt seat face.
1
1
‧Operating with sequence in reverse of
Disassembling.
*WARNING: use high pressure air clean
each way of carburetor.
*WARNING: must adjust air screw
when changing air screw and
carburetor ass’y.
5- 6
FUEL SYSTEM
Disassembly of Inlet Valve
h Disassembly of handle bar & front cover.
h Disassembly of fuel tank
h Disassembly of carburetor.
Operation / Parts Name
1
2
3
4
5
Disassembly
Intake manifold hose clamp
Hex washer face bolt
Intake manifold
Reed valve ass’y
Reed valve gasket
Assembly
5→1
Q’ty
Remarks
1
4
1
1
1
‧Assembling with sequence in reverse
of disassembly.
*WARNING: Using new gasket , the
4 Reed valve ass’y
5 Reed valve gasket
gasket must aim at hole of reed
valve.
*WARNING: confirm no leaking of the
reed valve and manifold.
5- 7
FUEL SYSTEM
Disassembly of Fuel Tank
z
Disassembly of handle bar and front cover.
* WARNING:
․No fire.
․Shall be wiped off when fuel overflowed.
Operation / Parts Name
Disassembly
1 Hex bolt
2 Clip
3 Fuel Tube
Assembly
3→1
Q’ty
Remarks
2
2
2
z
Operating with sequence in reverse of
disassembly.
5- 8
FUEL SYSTEM
Replace Air filter
z
z
z
z
z
Disassembly of oil tank.
Remove 2 Hex Bolt and move to the rear of the Air Cleaner Ass’y.
Remove 3 Tapping Screw Truss Head Phillips.
Remove Air Cleaner case cap.
Replace new Air filter.
Disassembly of Air Cleaner Ass’y
z
z
Disassembly of handle bar and front cover.
Disassembly of oil tank.
Operation / Parts Name
1
2
3
4
5
6
7
8
Disassembly
Hex socket bolt
Plain washer
Self-tapping screw
Air cleaner case cap
Air filter
Air cleaner case
Cleaner guide pipe
Grommet
Assembly
8→1
Q’ty
Remarks
2
1
3
1
4
1
2
1
z
Operating with sequence in reverse of
disassembly.
5- 9
REMOVE OF ENGINE
Attention of Operation
‧Operation after disassembling the engine.
–Crank shaft case
–Crank shaft
–Exchange bearing of final transmission mechanisms.
Disassembly of Engine
‧Disassembly of external cover of body.
‧Disassembly of throttle valve and cable.
6- 1
REMOVE OF ENGINE
Operation / Parts Name
1
2
3
4
5
6
7
8
9
10
11
12
Disassembly
Oil Tank
Air Cleaner Ass’y
Tail of Muffler
ACG wire /wire of start motor
Starter wire of carburetor
Vacuum pressure tube
Cap of spark plug
Oil pump control cable
Throttle cable
Drive Sprocket Ass’y
Hex washer face bolt of engine
Engine
Assembly
12→1
Q’ty
Remarks
1 4WARNING:
1
The oil over-flow when remove the oil tube ,
so use clip or plug stop the seal.
1
2
1
1
1
1
1
1 4WARNING:
4 z Actually for brace the frame, avoid body
turn inside out.
1
4WARNING: Carry out following adjusting
after installation.
–Cable of throttle valve
–Oil pump control cable
–Rear break cable
6- 2
REMOVE OF ENGINE
Disassembly of Muffler
1
2
3
4
5
6
Operation / Parts name
Disassembly
Remove tail of muffler
Take off the engine Ass’y
Hex head phillips bolt
Hex washer face bolt
Hex washer face bolt
Muffler
Assembly
5→1
Q’ty
Remarks
1
1
2
1
1
• Assembling with sequence in reverse
of disassembly.
6- 3
CYLINDER HEAD / CYLINDER / PISTON
Attention of Operation
z
z
z
z
z
z
Can be operated when engine installed on vehicle.
Must cleaning before operating, avoiding dust enter the engine.
Remove the gasket dust stay on joint face.
Avoid to use screw driver harm the joint face when remove the cylinder &
cylinder head.
Avoid to harm the cylinder inner surface and piston face.
Cleaning before check parts, and smear motor oil appointed in sliding face before
installing.
Diagnosis of Troubles
Low compression pressure , poor start , idle speed not stable
z Air leakage of cylinder head gasket.
z Wear & damage the piston ring.
z Wrong installation of spark plug
z Wear & damage the cylinder and piston.
z Reed valve defect.
Compression pressure too high, overheating, locking
z Piling up carbon of cylinder head or piston head.
Piston Noise
z Wear the cylinder and piston.
z Wear the piston pin hole and piston pin.
z Wear the needle bearing of crank connecting rod (small end) .
Piston ring noise
z Wear or damage the piston ring.
z Wear or damage the cylinder.
7- 1
CYLINDER HEAD / CYLINDER / PISTON
Disassembly of Cylinder Head / Cylinder / Piston
• Disassembly of cover
• Disassembly of muffler
• Disassembly of generator cover
• Disassembly of spark plug cap
7- 2
CYLINDER HEAD / CYLINDER / PISTON
Operation / Parts Name
Q’ty
Remarks
Disassembly
Cylinder head
1 Nut of cylinder head
2 Cylinder head
3 Cylinder head gasket
Cylinder
4 *WARNING: Loosing nut 2-3 times.
1
1
4 Cylinder
5 Cylinder gasket
1 *WARNING: Don’t knock cooling fin.
1 *WARNING: Clean and not damage
cylinder gasket of crank shaft
case.
Piston
6
7
8
9
10
Piston ring clip
Piston pin
Piston
Piston ring
needle bearing
Assembly
10→1
2
1
1
2
1
‧Operation with sequence in reverse of
disassembly.
Installation of Piston Ring
‧Install top-piston ring & 2nd piston
ring on piston.
‧Do not scratch piston and do not bend
piston rings.
‧Remove carbon muck inside ring
ditch
and piston ring when not installed.
‧Be sure the rings rotate freely after
install into piston.
*WARNING:
Change whole set of piston ring with
genuine parts.
7- 3
Starter / Driving Disc / Clutch / Transmission Disc
Attention of Operation
z
Don’t make greases stick to surface of transmission belt or belt plate.
Otherwise , the efficiency of power transmission will be lowered by skid.
Diagnosis of Trouble
Vehicle does not move after engine start up
z
z
z
z
Drive belt wear-out
Drive face comp. damage
Clutch lining wear-out
Driven Ass’y spring defect
Power insufficient
z
z
z
z
Drive belt wear-out
Driven Ass’y spring defect
Drive face dirty or oily
Weight roller wear-out
8-1
Starter / Driving Disc / Clutch / Transmission Disc
Disassembly of Left Crank Case Cover
Operation / Parts name
Disassembly
1
2
3
4
5
6
Hex socket bolt
Carburetor tube bracket
Left crank case cover
Crankcase cover gasket
Dowel pin
Grommet
Assembly
6→1
Q’ty
Remark
12
1
1
1
2
1
‧Operation with sequence in reverse
of disassembly.
8-2
Starter / Driving Disc / Clutch / Transmission Disc
Disassembly of Kick Starter
z
1
2
3
4
5
6
7
8
9
Disassembly of left crank case cover.
Operation / Parts name
Disassembly
Kick pinion spring clip
Kick pinion
Hex washer face bolt
Kick crank
External ring clamp
Plain washer
Starting shaft ass’y
Starting shaft reset spring
Bushing
Q’ty
1
1
1
1
1
1
1
1
1
Remark
*WARNING: Rotating pedal kick to
crank and remove the case cover
assembly.
8-3
Starter / Driving Disc / Clutch / Transmission Disc
9
8
7
6
5
4
3
2
1
Operation / Parts name
Assembly
Washer
Starting shaft reset spring
Starting shaft ass’y
Plain washer
External ring clamp
Kick crank
Hex washer face bolt
Kick pinion
Kick pinion spring clip
Q’ty
1
1
1
1
1
1
1
1
1
Remark
4WARNING: Unable to install main
shaft fix position when inside and
outside reset spring overlap. Use
flat-driver screw start from inside
then outside spring and press
main shaft.
Installation of Kick Pinion
/ Kick Pinion Spring Clip
‧Set kick starter shaft first.
‧Turning starter, hang kick pinion spring
clip on crank shaft case convex and
assembly of kick pinion to the location
of removing.
‧Turning starter, let starting shaft and
kick pinion conjoin.
Check of Starter
‧Check the wear & damage of starting
shaft or gear.
‧Check the tightness & damage of
starting shaft reset spring.
‧Check the wear & damage of bush.
8-4
Starter / Driving Disc / Clutch / Transmission Disc
‧Check the wear & damage of kick
pinion.
‧Check the wear & damage of kick
pinion spring clip.
8-2
Starter / Driving Disc / Clutch / Transmission Disc
Disassembly of Left Crank Case
1
2
3
4
5
6
7
8
9
10
11
12
Operation / Parts name
Disassembly
Hex washer face bolt
Cone spring washer
One-way clutch gear
Clamp washer
Primary fixed sheave
Bushing
V-Belt
Primary sliding slot wheel
Oil ring
Hex nut
Clutch cover
Drive face ass’y
Assembly
12→1
Q’ty
1
1
1
1
1
1
1
1
1
1
1
1
Remark
*.WARNING:
Don’t damage transmission belt.
‧Operation with sequence in reverse
of disassembly.
8-2
Starter / Driving Disc / Clutch / Transmission Disc
Disassembly of Sliding Driving Disc
Operation / Parts name
Disassembly
1
2
3
4
Cam plate
Cam plate slider
Weight roller
Primary sliding slot wheel
Assembly
4→1
Q’ty
Remark
1
3
6
1
‧Operation with sequence in reverse
of separating.
8-3
Starter / Driving Disc / Clutch / Transmission Disc
Disassembly of Clutch / Transmission Belt Disc
Operation / Parts name
Disassembly
Clutch
1 Nut
2 Clutch Weight Set
Drive face ass’y
3 Axle ring of spring
4 Compression spring
5 Secondary spring seat
6 Guide pin
7 Secondary sliding slot wheel
8 Oil ring
9 Oil seal
10 Needle bearing
11 Internal circle clip
12 Radial ball bearing
13 Secondary fix slot wheel
Assembly
13→1
Q’ty
Remark
1
1
1
1
1
2
1
2
2
1
1
1
1
‧Operation with sequence in reverse
of separating.
8-4
Final Transmission Mechanism
Attention of Operation
z
z
This chapter explain that final reduction mechanism maintenance can be operated
in the vehicle.
Use professional tool to change driving shaft.
Replace Transmission Gear Oil
z
z
z
z
z
z
z
z
Remove 4 Hex Washer Face Bolt fixed on Floor Panel.
Move forward the Floor Panel.
Remove Hex Washer Face Bolt and Copper Plain Washer.
Leak out oil Transmission Gear Oil.
Fix Hex Washer Face bolt and Copper Plain Washer.
Remove Oil Plug and add 80C.C. new Transmission Gear Oil.
Fix Oil Plug.
Recommend use grade SAE 90 or 85W-140 Gear Oil.
Diagnosis of Trouble
Engine starts but vehicle does not move.
z
z
Transmission gears broken.
Transmission gears burns out.
Operate of noise
z Abrasion、wore and teeth hurted of gear
z
Bearing wore and loosened.
Gear oil leaking
z
z
Too much gear oil filled.
Oil seal wear-out or damage.
9- 1
Final Transmission Mechanism
Disassembly of primary drive gear / final reduction mechanism
z
z
Disassembly of Drive Sprocket Ass’y (Remove 1 Nylon Nut and 1 Plain Washer).
Disassembly of clutch / drive face.
4WARNING:
First drain the oil of transmission.
1
2
3
4
5
6
7
8
Operation / Parts name
Disassembly
Bolt
Mission cover
Gasket
Dowel pin
Drive axle
Main axle comp.
Plain washer
Primary drive gear
Assembly
8→1
Q’ty
5
1
1
2
1
1
1
1
Remark
z
Check the wear & damage of
shaft and gear.
z
Operation with sequence
reverse of disassembly.
in
9- 2
Final Transmission Mechanism
Change the Driving Shaft
z
Remove the driving shaft from mission cover.
*WARNING:
Don’t damage joint face of mission cover.
z
z
Remove the oil seal of primary drive gear.
Remove the bearing.
z
Install the new bearing in the mission cover.
9- 3
Crank Case / Crank Shaft
Attention of Operation
z
This chapter explain the necessary procedure of disassembling crank case due to
repair & maintain the crank shaft.
z Before disassembling of crank case , must operation with sequence of each
chapter to disassembly.
–Disassembly of oil pump
–Disassembly of carburetor
–Disassembly of intake valve
–Dis-mounting of engine
–Disassembly of cylinder head and cylinder
–Disassembly of ACG
–Disassembly drive face ass’y
z
Must disassembly of final reduction mechanism when change the left crank case.
z
Must use special tool into the inner ring of crank shaft bearing , and pull in crank
shaft to assembly when assembly crank case & crank shaft , put new bearing into
crank case, and put into new oil seal after assembling crank case.
Diagnosis of Troubles
Noise of Engine
z Damage of crankshaft bearing.
z Damage of needle bearing of crankshaft pin.
10- 1
Crank Case / Crank Shaft
Assembly / Disassembly of Crank Case
1
2
3
4
5
6
7
8
9
10
11
12
13
Operation / Parts name
Disassembly
Hex socket bolt
Right crank shaft case
Dowel pin
Fix shaft of crank shaft case
External circle clip
Crank shaft
Radial ball bearing (Right)
Radial ball bearing (Left)
Hex socket bolt
Oil seal bracket
Right oil seal
Left oil seal
Radial ball bearing
Assembly
13→1
Q’ty
Remark
6
1
2
1
2
1
2
1
1
1
1
1
2
10- 2
Crank Case / Crank Shaft
Disassembly of Crank Case
z
separate the crank case, and never use the
old oil seal.
Install the puller on right crank case,
separate the R. crank case and L.
crank case.
: Crank case puller (TLJT-03)
z
Install the puller on left crank case,
remove the crank shaft from the
crank case.
: Crank case puller (TLJT-03)
*WARNING:
Don’t knock the crank shaft when
disassembling.
z
Use the bearing puller to remove the
crankshaft bearing from crank shaft,
then remove the R/L crank case.
: Bearing puller ( TLJT-00)
*WARNING:
Must remove the oil seal when
Assembly of Crank Case
z
Clean the crank case with gasoline, and check each part whether damaged or
cracked.
*WARNING:
z
z
Smear of oil on sliding surface of each shaft in crank case after checking.
Cleaning the washer dust of joint face, and amend the part damage with oil stone.
10- 3
Crank Case / Crank Shaft
z
z
Put new crank shaft into right
crankcase.
Put crank shaft assembly into left
crank case.
*WARNING:
z
z
z
Smear the 2-stroke oil to main
bearing and big end of connecting
rod.
Note the position of connecting rod.
Put left oil seal into L. crank shaft
case, surface depth under 1.0 mm.
10- 4
Crank Case / Crank Shaft
Assembly of Crank Case
z
z
Install the dowel pins in the joint face
of left crank case.
‧Install the right crank case.
: Bearing puller (TLJT-00)
z
Install the new R. oil seal to crank
case.
: Bearing puller (TLJT-00)
10- 5
Front Wheel
Attention of Operation
‧Remove the body cover and support the frame body bottom before remove the front
wheel, don’t invert the front wheel when front wheel depart ground.
Diagnosis of Trouble
Steering handle not straight
•
Loose, not correct adjustment or
damaged, right (or left) link Ass’y.
•
•
•
Steering shaft bended.
Suspension arm, knuckle damaged.
Rim damaged.
Heavy steering movement
•
Air pressure too low inside of front
tire.
•
Rim radial ball bearing broken.
Brake efficiency abnormal
Front wheel shaking or deviation
•
•
Brake lining wear-out.
Brake pads adjust not correct or
wear out.
•
•
Front rim defected.
Loose or damaged of front rim
bearings.
•
•
Brake drum wear-out.
Tire wear-out.
•
•
Tire defect.
Bad adjustment or defected of the
right (or left) link Ass’y.
•
Bad adjustment or defected of the
right (or left) knuckle.
11- 1
FRONT WHEEL/FRONT SUSPENSION/ FRONT BRAKE
Disassembly of Front Wheels of ATV-50
Operation / Parts name
Disassembly front wheels (L/R)
1
2
3
4
Rubber cover
Cotter pin
Scotch nut
Plain washer 12*40*4.5
Q’ty
Remarks
2
2
2
2
Disassembly front brake drum
5
6
7
8
Hex washer face bolt
Front coller
Front brake drum
Rim
Assembly front brake drum
8→5
Assembly wheels
4→1
8
2
2
2
z
Assembling with sequence
in reverse of disassembly.
*WARNING:
Change the R/L bearing set
if necessary.
11- 2
FRONT WHEEL/FRONT SUSPENSION/ FRONT BRAKE
Disassembly of Front Wheels of ATV-90/100
Operation / Parts name
Disassembly front wheels (L/R)
1
2
3
4
Rubber cover
Cotter pin
Scotch nut
Plain washer 12*40*4.5
Q’ty
Remarks
2
2
2
2
Disassembly front brake drum
5
6
7
8
Hex washer face bolt
Front coller
Front brake drum
Rim
Assembly front brake drum
8→5
Assembly wheels
4→1
8
2
2
2
z
Assembling with sequence
reverse of disassembly.
in
*.WARNING:
Change the R/L bearing set if
necessary.
11- 3
FRONT WHEEL/FRONT SUSPENSION/ FRONT BRAKE
Disassembly of Front Brake
Operation / Parts name
Disassembly brake plate
1 Handle bar
2 Release adjustment screws
3 Release front (left or right) wheel
Ass’y
4 Strain spring
5 Front brake shoe Comp.
6 Release brake cables
7 Front brake panels
Assembly
7→1
Q’ty
Remarks
1
2
2
2
2
2
2
z
Assembling with sequence
reverse of disassembly.
in
11- 4
FRONT WHEEL/FRONT SUSPENSION/ FRONT BRAKE
Disassembly of Suspension Arm
Operation / Parts name
Disassembly (L/R)
1
2
3
4
5
6
Hex bolt
Hex flange nut with serration
Release front cushions
Hex flange nut with serration
Hex washer face bolt
Suspension arms
Assembly
6→1
Q’ty
Remarks
2
2
2
4
4
2
z
Assembling with sequence
reverse of disassembly.
11- 5
in
FRONT WHEEL/FRONT SUSPENSION/ FRONT BRAKE
Disassembly of Steering Shaft Ass’y
1
1
2
3
4
5
6
7
8
9
10
11
12
Operation / Parts name
Q’ty
Remarks
Disassembly steering shaft Ass’y
Handle bar A’ssy
1
Hex flange nut with serration
2
Steering shaft holder
2
Holder spacer coller
2
Hex flange nut with serration
2
Release Ball joint, left (right) thread
1
Steering shaft Ass’y
1
1
Disassembly knuckles
Cotter pin
2
Hex flange nut with serration 2
Left & right link Ass’y
2
Scotch flange nut
2
Left & right knuckle
2
z Assembling with sequence in reverse of
Assembly knuckles
disassembly.
12→8
*WARNING: Adjusting gap of throttle.
Aassembly steering shaft Ass’y
7→1
11- 6
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