Adjusting The Engine Idling Speed - Yamaha YZF-R1 98 Service Manual

SYNCHRONIZING THE CARBURETORS/

ADJUSTING THE ENGINE IDLING SPEED

NOTE:
After each step, rev the engine tw o or
three tim es, each tim e 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 sam e.
c. Synchronize carburetor #2 to carbure-
tor #3 by turning the synchronizing
screw 3 in either direction until both
gauges read the sam e.
Vacuum pressure at engine
idling speed
29.3 kPa (0.293 kg/ cm
mm Hg)
NOTE:
The difference in vacuum
betw een tw o carburetors should not
exceed 1.33 kPa (10 m m Hg).
8. M easure:
• engine idling speed
Out of specification → Adjust.
9. Stop the engine and rem ove the m ea-
suring equipm ent.
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
EB303020
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
Prior to adjusting the engine idling
speed, the carburetor synchronization
should be adjusted properly, the air filter
elem ent should be clean, and the engine
should have adequate com pression.
1. Start the engine and let it w arm up for
several m inutes.
3 - 16
CHK
ADJ
2
, 220
pressure