4 - 5
ENG
CARBURETOR
EC464400
Jet needle
1. Inspect:
●
Jet needle
1
Bends/wear
→
Replace.
●
Clip position
Standard clip position:
No.2 Groove
EC464511
Float height
1. Measure:
●
Float height
a
Out of specification
→
Adjust.
Float height:
15.5 ~ 16.5 mm (0.61 ~ 0.65 in)
Measurement and adjustment steps:
●
Hold the carburetor in an upside down
position.
●
Measure the distance between the mating
surface of the float chamber and top of the
float using a vernier calipers.
●
If the float height is not within specifica-
tion, inspect the valve seat and needle
valve.
●
If either is worn, replace them both.
●
If both are fine, adjust the float height by
bending the float tab
1
on the float.
●
Recheck the float height.
NOTE:
●
Slowly tilt the carburetor in the opposite
direction, then take the measurement
when the needle valve aligns with the float
arm.
●
If the carburetor is level, the weight of the
float will push in the needle valve, result-
ing in an incorrect measurement.
NOTE:
The float arm should be resting on the nee-
dle valve, but not compressing the needle
valve.
Summary of Contents for TTR90(M)
Page 45: ...GEN INFO MEMO...
Page 55: ...GEN INFO MEMO...
Page 101: ...SPEC MEMO...
Page 269: ...ELEC MEMO...
Page 279: ...ELEC MEMO...
