2000 Yamaha Motorsports Big Bear 400 Owners Manual - Page 125

2000 Yamaha Motorsports Big Bear 400 Manual

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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 engine to 4,000 to 5,000 r/min. The engine 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 1. Throttle stop screw 8-17

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8-17
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
1