Adjusting The Engine Idling Speed - Yamaha YJ50RN Service Manual

ADJUSTING THE ENGINE IDLING SPEED

1
EAS00053
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
@
Prior to adjusting the engine idling speed, the
carburetor should be adjusted properly, the air
filter element should be clean, and the engine
should have adequate compression.
1. Start the engine and let it warm up for sev-
eral minutes.
2. Remove:
• center cover
1
Refer to "SIDE COVERS AND FOOTREST
BOARD".
3. Attach:
• inductive tachometer 1
(onto the spark plug lead of cylinder)
Inductive tachometer
4. Measure:
• engine idling speed
Out of specification → Adjust.
Engine idling speed
5. Adjust:
• engine idling speed
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a. Turn the throttle stop screw 1 in direction
a or b until the specified engine idling
speed is obtained.
Direction a
Direction b
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3 - 7
CHK
ADJ
YU-8036-A
1,800 r/min
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Engine idling speed is
increased.
Engine idling speed is
decreased.
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