Yamaha XP500 - Adjusting the Engine Idling Speed

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CHK
ADJ
CHECKING THE EXHAUST GAS AT IDLE/
ADJUSTING THE ENGINE IDLING SPEED
7. Measure:
• carbon monoxide density
• hydrocarbon density
Out of specification → Replace the muffler
assembly.
8. After replacing the muffler assembly,
recheck the exhaust gas at idle when cata-
lytic converter is operating.
EAS00052
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
Prior to adjusting the engine idling speed, the
throttle bodies synchronization should be
adjusted properly, and the engine should have
adequate compression.
1. Remove:
• right side cover
Refer to “SIDE COVER MOULDINGS AND
LEG SHIELD”.
2. Start the engine and let it warm up for sev-
eral minutes.
3. Check:
• engine idling speed
Out of specification → Adjust.
4. Adjust:
• engine idling speed
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a. Turn the Idle adjust screw 1 in direction a
or b until the specified engine idling speed
is obtained.
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Carbon monoxide density (when
catalytic converter is operating)
0.2 ~ 1.2%
(Reference value)
Engine idling speed
1,100 ~ 1,300 r/min
Direction
a
Engine idling speed is
increased.
Direction
b
Engine idling speed is
decreased.
1
b
a