Yamaha YFM660RN Service Manual page 69

ADJUSTING THE THROTTLE LEVER FREE PLAY
2.Adjust:
Throttle lever free play
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Adjustment steps:
First step:
Pull back the adjuster cover 1.
Loosen the locknut 2 on the carburetor side.
Turn the adjuster 3 in or out until the correct
free play is obtained.
Turning in Free play is increased.
Turning out Free play is decreased.
Tighten the locknut 2.
Push in the adjuster cover 1.
NOTE:
If the free play cannot be adjusted here, adjust
it at the throttle lever side of the cable.
Second step:
Pull back the adjuster cover 4.
Loosen the locknut 5.
Turn the adjuster 6 in or out until the correct
free play is obtained.
Turning in Free play is increased.
Turning out Free play is decreased.
Tighten the locknut 5.
Push in the adjuster cover 4.
WARNING
After adjusting the free play, turn the handle-
bar to the right and left to make sure that the
engine idling speed does not increase.
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