Adjusting The Engine Idling Speed - Yamaha Raptor 90 YFM90RA 2011 Service Manual

ADJUSTING THE ENGINE IDLING SPEED

EBS00051
ADJUSTING THE ENGINE IDLING SPEED
1. Start the engine and let it warm up for sev-
eral minutes.
2. Attach:
• engine tachometer
(to the spark plug lead)
Inductive self-powered tachome-
ter
P/N. YU-8036-B
Engine tachometer
P/N. 90890-03113
3. Measure:
• engine idling speed
Out of specification
Engine idling speed
1,600 ~ 1,800 r/min
4. Adjust:
• engine idling speed
a. Turn the throttle stop screw
the specified idling speed is obtained.
Turning right
Turning left
5. Detach:
• engine tachometer
6. Adjust:
• throttle lever free play
Refer to "ADJUSTING THE THROTTLE
LEVER FREE PLAY".
Throttle lever free play
1.0 ~ 3.0 mm (0.04 ~ 0.12 in)
3 - 10
CHK
ADJ
→
Adjust.
in or out until
Idling speed becomes
higher.
Idling speed becomes
lower.