Operation Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6
2. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-
rection
a
. To decrease the engine
idling speed, turn the screw in di-
rection
b
.
NOTE:
_
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
_
EAU00635
Adjusting the throttle cable
free play
The throttle cable free play should
measure 3–7 mm at the throttle grip.
Periodically check the throttle cable
free play and, if necessary, have a
Yamaha dealer adjust it.
EAU00637
Adjusting the valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle stop screw
Engine idling speed:
1,200–1,300 r/min
a. Throttle cable free play
U4TVE6.book Page 20 Saturday, August 4, 2001 12:14 PM