Yamaha TT-R125(S) 2003, Owner'S Service Manual

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ENG
CARBURETOR
EC464301
Throttle valve
1. Check:
●
Free movement
Stick
→
Repair or replace.
NOTE:
Insert the throttle valve
1
into the carburetor
body, and check for free movement.
EC464401
Jet needle
1. Inspect:
●
Jet needle 1
Bends/wear
→
Replace.
●
Clip groove
Free play exists/wear
→
Replace.
●
Clip position
Fuel level
1. Measure:
●
Fuel level
a
Out of specification
→
Adjust.
Standard clip position:
No. 2 Groove
Fuel level:
6.0 ~ 7.0 mm (0.24 ~ 0.28 in)
Below the float chamber mat-
ing surface
Measurement and adjustment steps:
●
Connect the fuel level gauge 1 to the float
chamber.
Fuel level gauge:
YM-1312-A/90890-01312
●
Hold the fuel level gauge vertically next to
the float chamber mating surface.
●
Loosen the drain screw.
●
Measure the fuel level with the fuel level
gauge.
NOTE:
Keep the carburetor and fuel level gauge
vertically when measuring the fuel level.
●
If the fuel level is not within specification,
inspect the needle valve seat and needle
valve.
●
If either is worn, replace them both.
●
If both are fine, adjust the fuel level by
bending the float tab
b
on the float.
●
Recheck the fuel level.