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13. Remove the float and needle valve.
14. Change the main jet and the jet needle clip po-
sition.
TIP
Optional main jets can be obtained at a Yamaha
dealer.
After the jet needle clip position is changed, the
throttle cables may need to be adjusted.Assembling and installing the carburetors
Assemble and install both carburetors by the fol-
lowing steps.
1. Install the needle valve and float.
2. Install the float chamber by installing the
screws.
3. Install the carburetor and tighten the joint
screws.
4. Assemble the throttle valve.
5. Install the mixing chamber cap, and then tight-
en it securely to the specified torque.
6. Install the mixing chamber cap securing plate
by installing the screw.NOTICE
ECB00501
Be sure to match one of the projections on the
carburetor cap with one of the slots on the se-
curing plate. If the securing plate does not
match a projection, tighten the carburetor cap
until they align. Do not loosen the carburetor
cap.
1. Float
2. Needle valve
3. Main jet
1
2 3
Tightening torque:
Mixing chamber cap:
4 Nm (0.4 m·kgf, 2.9 ft·lbf)
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7. Tighten the mixing chamber cap securing
plate screw to the specified torque.
8. Tighten the carburetor joint screws.
Adjusting the throttle cables
1. Move the throttle lever a few times.
2. Push the throttle lever forward until it stops
and hold it in this position.
3. Check through each carburetor window to see
if the punch mark on the throttle valve is at the
specified position.
4. If not, loosen the locknut and turn the adjust-
ing nut until the specified position is obtained.
1. Mixing chamber cap securing plate
2. Projection
3. Slot
4. Screw
Tightening torque:
Mixing chamber cap securing plate screw:
3.5 Nm (0.35 m·kgf, 2.5 ft·lbf)
12
3
4
1. Punch mark
2. Specified position: 0–1mm
1
2
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NOTICE
ECB00680
Make sure the bulb holder cover is securely fit-
ted over the bulb holder and seated against the
reflector.
7. Place the headlight unit in the original posi-
tion, and then install the screw.
8. Adjust the headlight beam if necessary.
EBU25551
Adjusting a headlight beam
NOTICE
ECB00690
It is advisable to have a Yamaha dealer make
this adjustment.
To raise a headlight beam, turn the headlight beam
adjusting screw in direction (a).
To lower a headlight beam, turn the adjusting
screw in direction (b).
1. Headlight bulb holder cover
2. Headlight bulb holder
3. Headlight unit
1
2
3
1. Headlight beam adjusting screw
1
(a) (b)
