Yamaha YZF-R1S Service Manual - Chk
3-21
ADJUSTING THE ENGINE IDLING SPEED
CHK
ADJ
NOTE:
a
b
EAS00052
ADJUSTING THE ENGINE IDLING SPEED
Prior to adjusting the engine idling speed, the
throttle bodies synchronization should be ad-
justed properly, and the engine should have ad-
equate compression.
1. Start the engine and let it warm up for several
minutes.
2. Install:
Sdigital tachometer
(near the spark plug)
3. Check:
Sengine idling speed
Out of specification
! Adjust.
Engine idling speed
1,150
X 1,250 r/min
4. Adjust:
Sengine idling speed
a. Turn the idle adjusting screw
1
in direction
a
or
b
until the specified engine idling
speed is obtained.
Direction
Engine idling speed is
increased.
Direction
Engine idling speed is
decreased.
5. Adjust:
Sthrottle cable free play
Refer to “ADJUSTING THE THROTTLE
CABLE FREE PLAY”.
Throttle cable free play (at the
flange of the throttle grip)
3
X 5 mm (0.12 X 0.20 in)