Yamaha TTR90(M) Owner's Service Manual page 114

ENGINE/THROTTLE CABLE ADJUSTMENT/
AIR FILTER CLEANING
EC350000
ENGINE
EC35A001
THROTTLE CABLE ADJUSTMENT
1. Check:
Throttle grip free play a
Out of specification
Throttle grip free play a:
3 ~ 5 mm (0.12 ~ 0.20 in)
2. Adjust:
Throttle grip free play
Throttle grip free play adjustment steps:
NOTE:
Before adjusting the throttle cable free play,
the engine idle speed should be adjusted.
Loosen the locknut 1 on throttle cable.
Turn the adjuster 2 in or out until the
specified free play is obtained.
Turning in:
Turning out:
Tighten the locknuts.
WARNING
After adjusting, turn the handlebar to
right and left and make sure that the
engine idling does not run faster.
EC35G040
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.
3 - 3
INSP
ADJ
Adjust.
Free play is increased.
Free play is decreased.