Owner`s manual

6-16
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU01168
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
NOTE:
A diagnostic tachometer is needed to
make this adjustment.
1. Attach the tachometer to the
spark plug lead.
2. Start the engine and warm it up
for several minutes at
1,000–2,000 r/min while occa-
sionally revving it to 4,000–5,000
r/min.
NOTE:
The engine is warm when it quickly
responds to the throttle.
3. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the
engine idling speed, turn the
screw in direction a. To
decrease the engine idling
speed, turn the screw in direction
b.
NOTE:
If the specified idling speed cannot
be obtained as described above,
have a Yamaha dealer make the
adjustment.
Engine idling speed:
1,300–1,400 r/min
a
EAU00634
Adjusting the throttle cable
free play
The throttle cable free play should
measure 3–5 mm at the throttle grip.
Periodically check the throttle cable
free play and, if necessary, adjust it
as follows.
NOTE:
The engine idling speed must be cor-
rectly adjusted before checking and
adjusting the throttle cable free play.
a. Throttle cable free play
1
a
b
1. Throttle stop screw
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