Idle Speed Adjustment - Yamaha BIG BEAR YFM400NN Owner's Manual

EBU00301

Idle speed adjustment

NOTE:
A diagnostic tachometer must be used for
this procedure.
1. Start the engine and warm it up for a
few minutes at approximately 1,000 to
2,000 r/min. Occasionally rev the en-
gine to 4,000 to 5,000 r/min. The en-
gine is warm when it quickly responds
to the throttle.
2. Connect the tachometer and set the
idle to the specified idling speed by
adjusting the throttle stop screw. Turn
the screw in to increase engine speed,
and out to decrease engine speed.
Specified idle speed:
1,450 ~ 1,550 r/min
1. Throttle stop screw
8-17