PERIODIC MAINTENANCE AND ADJUSTMENT
7-20
2
3
4
5
6
7
8
9
3. Insert the tailpipe into the muffler.
4. Install the spark arrester cap by in-
stalling the bolts, and then tighten-
ing them to the specified torque.
TIP
Make sure to align the bolt holes when
installing the spark arrester cap.
EAU45321
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows.
TIP
A diagnostic tachometer is needed to
make this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the idle adjust-
ing screw. To increase the engine
idling speed, turn the screw in di-
rection (a). To decrease the en-
gine idling speed, 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.
1. Tailpipe
2. Spark arrester
Tightening torque:
Spark arrester cap bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1
2
1. Idle adjusting screw
Engine idling speed:
1450–1650 r/min
1
(b)
(a)