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8
TIP
A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
idle adjusting screw. To increase the engine
idling speed, turn the idle adjusting screw in
direction (a), and to decrease it, turn the
screw in direction (b).
TIP
If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
EBU24048
Adjusting the throttle lever free play
The throttle lever free play should be checked and,
if necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.
The throttle lever free play should measure 2.0–4.0
mm (0.08–0.16 in) as shown. Periodically check
the throttle lever free play and, if necessary, adjust
it as follows.
TIP
The engine idling speed must be checked, and
adjusted if necessary, before adjusting the throttle
lever free play.
1. Slide the rubber cover back.
2. Loosen the locknut.
1. Idle adjusting screw
1
(a)
(b)
Engine idling speed:
1500–1700 r/min
U1VS60E0.book Page 28 Tuesday, October 8, 2013 1:05 PM
