Instruction Manual for TAKEGAWA-made CARBURETOR SET to Install Keihin PE28 Carburetor Kit
Item No. :０３―０５―０９８１ (Carburetor set)
：０３―０２―２５５１ (Manifold kit)
COPY
：AB27-1000001 ∼
・Before installing the kit, please be sure to check the kit contents. Should you have any questions about the kit, please contact your local motorcycle dealer.
Read all instructions first before starting the installation
◎ We do not take any responsibility for any accident or damage whatsoever arising from the use of the kit not in conformity with the instructions in the
manual.
(For exclusive use in Super Head+R-equipped motorcyles)
◎ Please note that, in some cases, the illustrations and photos may vary from the actual hardware.
◎ We shall be held free from any kind of warranty whatsoever of products other than this product if the glitch takes place on the other products than this
one after the installation and use of this product.
◎ This carburetor kit is for exclusive use in a motorcycle equipped with TAKEGAWA-made Super Head+R Bore Up Kit and Bore Stroke Up Kit and is
compatible only with a stock engine and Super Head+R.
◎ Do the installation work correctly referring to the relative Honda’s genuine service manual for the above-mentioned fitting models.
◎Please note that this kit is designed for exclusive use in the above-mentioned fitting models and frame numbers only and that it cannot be mounted on
other models.
◎ You are kindly requested not to contact us about the combination of our products with other manufacturers'.
◎ Setting of a carburetor must be adjusted depending on the natural phenomena like the weather, temperatures and barometic pressure, and machine
and carburetor themselves. Arrange the setting to match the engine and other conditions. For your information, the carburetor is shipped out in a state
described on page 2.
◎ A stock throttle housing is not to be used. Therefore, a brake lever, etc need to be prepared by a user.
◎This kit is designed for exclusive use in the closed racing. So, take note that it is prohibited to drive your motorcycle on a public road after the installation
of this kit. Drive your motorcycle at a legal speed, abiding by the laws.
Note
The following show the envisioned possibility of injuries to human bodies and property damage as a result of disregarding the following cautions.
・Work only when the engine and muffler are cool. (Otherwise, you will burn yourself.)
・Do the installation with right tools. (Otherwise, breakage of parts or injuries to yourself may take place.)
・Always use a torque wrench to screw bolts and nuts tight and securely to the specified torque.
(Otherwise, these parts may get damaged or fall off, resulting in accidents.)
・As some products and frames have sharp edges or protruding portions, please work with your hands protected.
(Otherwise, you will suffer injuries.)
・Before riding, always check every section for slack in parts like screws. If you find slack ones, screw them securely up to the specified torque.
(Otherwise, improper tightening may cause parts to come off.)
・Always use new gaskets, and packings. And check those parts to be reused for wear and damage. If you find worn or damaged parts, replace
them with new ones.
Warning
The following show the envisioned possibility of human death or serious injuries to human bodies as a result of disregarding the following warning.
・Always start the engine in a well-ventilated place, and do not turn on the engine in an airtight place.
(Otherwise, you will suffer from carbon monoxide poisoning.)
・When you notice something abnormal with your motorcycle while riding, immediately stop riding and park your motorcyle in a safe place to check
what has gone wrong. (Otherwise, the abnormality could lead to accidents.)
・Before doing work, make sure your motorcycle is secure on level ground for safety's sake.
(Otherwise, your motorcycle could overturn and injure you while you are working.)
・Check or carry out maintenance of your motorcycle correctly according to the procedures in the instruction manual or service manual.
(Improper checking or maintenance could lead to accidents.)
・If you find damaged parts when checking and performing maintenance of your motorcycle, do not use these parts any longer, and replace them
with new ones. The continued use of these damaged parts as they are could lead to accidents.)
・As gasoline is highly flammable, never place it close to fire. Make sure that nothing flammable is near the gasoline. Since vaporized accumulation of
gasoline is at high risk of explosion, work in a well-ventilated place. (Otherwise, it may cause a fire.)
◎ Please be informed that, mainly because of improvement in performance, design changes, and cost increase, the product specifications and prices
are subject to change without prior notice.
◎ This manual should be retained for future reference.
- 1 -
∼ Kit Contents ∼
０９―０２―０２２１
１
１０
０３―０２―２５５１
９
１３
１２
２
COPY
５
４
No.
７
８
Part Name Qty Part Name Qty
Factory preset mode of the carburetor
Main jet
Slow jet
Jet needle
１１
Clip position
Throttle valve cut-away # 6.0
Air screw opening
Throttle cable, 710mm
０９―０２―００７１
#128
#52
F1343H24NAAC
2nd groove from top
1±1/4 turns
1 Carburetor assembly
2 Inlet pipe
3 Insulator
4 Insulator band
5 Inlet pipe gasket
1 03-03-027
1 17111-2SM-T00
1 16212-181-T01
1 00-00-0050
1 00-03-0009
1
1
1
1
3
4
1
10
10
6 Cap screw, 6x15
7 Cap screw, 6x20
8 Cap screw, 6x40
9 Air filter
2 00-00-0042
1 00-00-0043
1 00-00-0137
1 03-01-1064
10 Throttle COMP.
1
11 Throttle cable, 810mm 1 09-02-0081
12 Pair of throttle grips
13 Fuel hose, 200mm
1
1
09-02-0002
00-03-0203
14 Main jet, #110
Main jet, #115
Slow jet, #35
1 00-03-0094
1 00-03-0096
1 00-03-0137
Hex wrench, 5mm 1
1
1
1
1
1
1
※Please note that in ordering repair parts, be sure to quote the Repair Part Item No. Otherwise, we may not be able to accept your orders.
There are some parts, however, for which we are not in a position to accept your order in just the quantity to be used. In this case, please
take them in the quantity packed.
PE28 Slow jet
Item No.
Item Name
00-03-0137 #35
00-03-0138 #38
00-03-0139 #40
00-03-0140 #42
00-03-0141 #45
00-03-0142 #48
00-03-0143 #50
00-03-0144 #52
00-03-0145 #55
00-03-0146 #58
00-03-0147 #60
00-03-0148 #62
00-03-0149 #65
00-03-0150 #70
PE28 Main Jet
Item No.
Item Name Item No.
Item Name Item No.
Item Name
00-03-0130 #82 00-03-0099 #122 00-03-0115 #162
00-03-0131 #85
00-03-0132 #88
00-03-0100
00-03-0101
#125
#128
00-03-0116
00-03-0117
#165
#168
00-03-0133 #90
00-03-0134 #92
00-03-0135 #95
00-03-0136 #98
00-03-0090 #100
00-03-0102
00-03-0103
00-03-0104
00-03-0105
00-03-0106
#130
#132
#135
#138
#140
00-03-0118
00-03-0119
00-03-0120
00-03-0121
00-03-0122
#170
#172
#175
#178
#180
00-03-0091 #102
00-03-0092 #105
00-03-0093 #108
00-03-0094 #110
00-03-0095 #112
00-03-0096 #115
00-03-0097 #118
00-03-0098 #120
00-03-0107 #142
00-03-0108 #145
00-03-0109 #148
00-03-0110 #150
00-03-0111 #152
00-03-0112 #155
00-03-0113 #158
00-03-0114 #160
00-03-0202 #182
00-03-0123 #185
00-03-0124 #188
00-03-0125 #190
00-03-0126 #192
00-03-0127 #195
00-03-0128 #198
00-03-0129 #200
☆Setting of a carburetor must be adjusted depending on the natural phenomena like the weather, temperatures and barometic pressure, and machine and
carburetor themselves. Arrange the setting to match the engine and other conditions.
☆A stock air cleaner cannot be equipped together with this kit. The engine will go wrong if the engine gets wet. So, please refrain from running in the rain.
Besides, before washing your vehicle, cover the carburetor with a plastic sheet or the like to prevent water from getting into the carburetor.
Option
- 2 -
∼ Installation Procedures ∼
Check the kit contents.
○ Referring to the service manual, ○Remove a float chamber, and then a ○Adjust the free play at the throttle
demount the engine from the frame.
main jet. Attach a supplied main jet grip to be about 5 mm by turning
(Preparation for installation)
And with reference to the #110 and slow jet #35, and then a the adjuster of the throttle cable.
Note : Make sure that the en
installation procedures for the float chamber.
See the figure below.
gine and muffler are cool
Super Head+R, install the Super ○ Detach a top cover of the supplied
and that the motorcyle is
securely supported!
Head+R to the engine, and then
mount the engine onto the frame.
Note : Be sure to follow the
service-manual
instructions and the
specified torque!
Less free play
○After making sure that the fuel
cock is closed, open a drain cock
on the carburetor, and drain the
gasoline from the float chamber
COPY
a carburetor. Then remove the
carburetor with the air cleaner
box, the inlet pipe and all.
※ Be careful not to let any foreign
materials fall into the intake port.
Snap the throttle a few times to
make sure that the throttle moves
smoothly without sticking and that
lower throttle housing, and connect
the inner cable to the throttle pipe.
And attach the throttle housing to
the handle with two screws.
※ Apply grease to the rubbing
surface of the throttle pipe, the cable
end, and to the portion on the pipe to
carburetor, and pull out the spring
and the throttle valve. Pass the
inner cable of the throttle cable
through the carburetor top cover and
then through the spring.
And compressing the spring, fix the
top cover to the throttle valve. Fix
the throttle valve to the carburetor
by aligning a notch on the throttle
valve with the throttle stop screw.
More free play
Adjuster
About 5 mm
the throttle valve is fully open. Also
check that the throttle has free
play even when a steering handle
is turned all the way to the right or
to the left.
take up the cable.
Torque: 5 N･m (0.5 kgf･m)
Note : Be sure to follow the
specified torque.
○ Attach socket set screws, included
in the Cylinder Head Kit, to two taps
marked A on the cylinder head
surface to attach the inlet pipe to,
and tighten the screws to the
specified torque.
Torque: 5 N･m (0.5 kgf･m)
Note : Be sure to follow the
specified torque.
○Remove the throttle valve from the
carburetor. Separate the throttle
valve and the throttle cable.
Remove the top cover from the
throttle cable.
○ Unfasten pan screws on the
throttle housing to remove the
throttle housing.
Ａ
Ａ
○Put an inlet pipe gasket between the
cylinder head and the inlet pipe, and
tighten it with 6x20 and 6x45 socket
cap screws to the specified torque.
Torque: 10 N･m (1.0kgf･m)
Note : Be sure to follow the
specified torque.
○ Fit the carburetor into the insulator,
and fasten the carburetor with a
clamp band.
○ Attach an air filter, which please fix
by tightening a band.
○Insert a fuel tube and fasten it with
a tube clip. Open the fuel cock and
ckeck for oil leaks. (Do not leave
the cock open for many hours.)
○ Dispose of the blow-by gas from
the crankcase by yourself. (Some
races and regulations specify the
blow-by gas disposal.)
○ In sending back the blow-by gas
to the carburetor, connect the
blow-by hose with the union on
the air-filter.
○Pull the choke lever to start the
engine. Gradually push the lever
back and warm up the engine till
the revolution becomes smooth,
and finally push the lever back to
its original location.
In case the engine does not run
idle after the warm-up of the
engine, or the engine idling speed
is high, adjust the setting by
turning the throttle stop screw.
○ Adjust the setting with utmost
care in a safe place to meet the
specification of each motorcycle.
○Fix an earth wire to the frame with
an air-cleaner-mounting bolt.
Screw,
6x40
Inlet pipe
Screw,
6x20
○Fasten the insulator to the inlet pipe
with two socket cap screws.
Torque: 10 N･m (1.0kgf･m)
Co.,Ltd.
3-5-16 Nishikiorihigashi Tondabayashi Osaka Japan
TEL : 81-721-25-1357 FAX : 81-721-24-5059 URL : http://www.takegawa.co.jp
- 3 -
How to Set the Carburetor
・When the carburetor does not match the engine and the engine fails, the engine failures are caused by either too dense or too lean air-fuel mixture.
・The engine failure symptoms for the engine are as follows:
When the air-fuel mixture is too dense:
・The explosion sound with a dull thud continues intermittently.
・The engine malfunctions further if you use the choke.
・The engine malfunctions when you warm it up.
・The engine works well if the cleaner is detached.
・The motorcycle belches dense (or, black) exhaust gas.
・The plug smolders, getting blackened.
When the air-fuel mixture is too lean:
・The engine overheats somewhat.
・The engine starts working well If you use the choke,.
・The engine does not accelerate well. (No smooth acceleration)
・Revolutions change, generating weak power.
・The plug burns white.
Whether or not the engine revolution is in proportion to the throttle operation
・When the acceleration is not smooth or even, make the air-fuel mixture dense.
・Make the air-fuel mixture lean when the engine revolution goes up heavily and belches black gas.
The mixture ratio at this throttle position can be adjusted by the location of E-ring in the grooves. The air-fuel mixture becomes dense as the
location of the E-ring moves down from the 1st to the 5th groove.
○Main jet (The throttle position at 3/4 - 4/4)
The air-fuel mixture ratio at this throttle position can be adjusted by changing the number of the main jet. The larger the main jet numbers, the
denser the mixture ratio becomes.
In view of the engine and muffler specifications, select the most appropriate main jet to get the highest revolutions.
○Pilot jet (First of all, please adjust the air screw.)
・In case you have given more than three turns to the air screw to tighten it, use a pilot jet with a small number.
・ If you have tighten the air screw (clockwise) to the full, use a pilot jet with a larger number.
Check whether you have made a right choice of the pilot jet by seeing if the engine starts up revolving smoothly from the idling to running
at slow speed.
・When the engine revolves up unevenly, the pilot jet number is too small. (At idle)
・ When the motorcycle belches black exhaust gas and produces heavy exhaust sound, the pilot jet number is too big. (At idle)
・After replacing the pilot jet, you need to readjust the airscrew.
○ Air screw
The air screw adjusts the air mass flow at the time of engine’s revolving at slow speed. (At idling)
・Give the air screw a right turn → The air-fuel mixture gets dense.
・Give the air screw a left turn → The air-fuel mixture gets lean.
Loosen the tightened air screw back to the 1.5-turn position. And then from this position, give to the airscrew a right or left turn of 1/4 to 1/2
till the engine revolves at the highest speed.
Loosen the idle stop screw till you get the steady idling revolutions. And once again adjust the position of the airscrew to get the highest
revolutions.
●On how the barometric pressure, temperatures and humidity affect the setting:
・At highlands or at high altitudes, the barometric pressure and air density go down and the air gets into the carburetor in less amounts.
This makes the air-fuel mixture dense which was adjusted at low altitudes.
・Under the weather conditions with very low temperatures, the air density increases, which makes the air-fuel mixture lean.
・Under the rainy and humid weather conditions, the air density decreases, which makes the air-fuel mixture dense.
◎ Please be informed that, mainly because of improvement in performance, design changes, and cost increase, the product specifications and
prices are subject to change without prior notice.
◎ This manual should be retained for future reference.
Co.,Ltd.
3-5-16 Nishikiorihigashi Tondabayashi Osaka Japan TEL : 81-721-25-1357 FAX : 81-721-24-5059 URL : http://www.takegawa.co.jp
