7
7-17
EAU21402
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
Periodic maintenance and adjustment
EAU21377
Adjusting the throttle grip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, adjust it as fol-
lows.
TIP
The engine idling speed must be cor-
rectly adjusted before checking and
adjusting the throttle grip free play.
1. Loosen the locknut.
2. To increase the throttle grip free
play, turn the throttle grip free play
adjusting nut in direction (a). To
decrease the throttle grip free
play, turn the adjusting nut in di-
rection (b).
3. Tighten the locknut.
1. Throttle grip free play
Throttle grip free play:
3.0–5.0 mm (0.12–0.20 in)
1
1. Locknut
2. Adjusting nut
(a)
1 2 (b)
ZAUE0593
Summary of Contents for R15 YZF155 2018
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