Adjusting The Engine Idling Speed - Yamaha YZF-R1K Service Manual

SYNCHRONIZING THE CARBURETORS/

ADJUSTING THE ENGINE IDLING SPEED

NOTE:
After each step, rev the engine two or
three times, each time for less than a
second, and check the synchronization
again.
b. Synchronize carburetor #4 to carbure-
tor #3 by turning the synchronizing
screw 2 in either direction until both
gauges read the same.
c. Synchronize carburetor #2 to carbure-
tor #3 by turning the synchronizing
screw 3 in either direction until both
gauges read the same.
Vacuum pressure at engine
idling speed
29.3 kPa
(220 mm Hg, 8.66 in Hg)
NOTE:
The difference in vacuum pressure
between two carburetors should not
exceed 1.33 kPa (10 mm Hg, 0.4 in Hg).
8. Measure:
• engine idling speed
Out of specification → Adjust.
9. Stop the engine and remove the mea-
suring equipment.
10.Adjust:
• throttle 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)
EB303020
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
Prior to adjusting the engine idling
speed, the carburetor synchronization
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
several minutes.
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CHK
ADJ
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