Adjusting The Engine Idling Speed - Yamaha WR25RB Owner's Manual

Tightening torque:
Spark arrester cap bolt:
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
TIP
Make sure to align the bolt holes when
installing the spark arrester cap.
PERIODIC MAINTENANCE AND ADJUSTMENT
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows.
TIP
A digital tachometer is needed to make
this adjustment.
1. Position the digital tachometer at
the ignition coil, which is located in
the spark plug cap.
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).
7-21
EAU45322
1. Idle adjusting screw
Engine idling speed:
1450–1650 r/min
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
(b)
(a)
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