PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6
EAU01168
Idle speed adjustment
NOTE:
@
A diagnostic tachometer must be used
for this procedure.
@
1. Attach the tachometer. 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 quick-
ly responds to the throttle.
2. Set the idle to the specified engine
speed by adjusting the throttle
stop screw. Turn the screw in di-
rection
a
to increase engine
speed and in direction
b
to de-
crease engine speed.
NOTE:
@
If the specified idle speed cannot be
obtained by performing the above ad-
justment, consult a Yamaha dealer.
@
EAU00635
Throttle cable free play
inspection
There should be a free play of 4 ~
6 mm at the throttle grip. If the free play
is incorrect, ask a Yamaha dealer to
make this adjustment.
1. Throttle stop screw
Standard idle speed:
1,150 ~ 1,250 r/min
a. Free play
E_4xs_Periodic.fm Page 14 Tuesday, November 30, 1999 2:36 PM
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