Adjusting The Engine Idling Speed - Yamaha YJ125S Service Manual

ADJUSTING THE ENGINE IDLING SPEED

1
b
1
a
EAS00054
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
Prior to adjusting the engine idling speed, the
air filter element should be clean, and the en-
gine should have adequate compression.
1. Start the engine and let it warm up for sev-
eral minutes.
2. Connect:
8engine tachometer 1
(onto the spark plug lead of cylinder)
Engine tachometer
90890-03113 (YU-08036-C)
3. Check:
8engine idling speed
Out of specification
Engine idling speed
1600 ~ 1700 r/min
4. Adjust:
8engine idling speed
*****************************************************
a. Turn the throttle stop screw 1 in direction
a or b until the specified engine idling
speed is obtained.
Direction a
Engine idling speed is increased.
Direction b
Engine idling speed is decreased.
*****************************************************
5. Adjust:
8throttle cable free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY".
Throttle cable free play (at the flange
of the throttle grip)
3 ~ 5 mm (0.12 ~ 0.20 in)
3-10
CHK
ADJ
Adjust