2005 Yamaha Motorsports Big Bear 400 4x4 Owners Manual - Page 132

2005 Yamaha Motorsports Big Bear 400 4x4 Manual

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EBU13020 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 to the spark plug lead, and then set the idle to the specified idling speed by adjusting the throttle stop screw. Turn the screw in direction a to increase the engine speed, and in direction b to decrease the engine speed. Specified idle speed: 1,450-1,550 r/min 1. Throttle stop screw 8-23

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8-23
EBU13020
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 to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction
a
to
increase the engine speed, and in direc-
tion
b
to decrease the engine speed.
1.
Throttle stop screw
Specified idle speed:
1,450–1,550 r/min