Drive Chain Slack - Yamaha YZ65P Owner's Manual

Periodic maintenance and adjustment

Drive chain slack

The drive chain slack should be
checked before each ride and adjusted
if necessary.
To check the drive chain slack
1. Place the motorcycle on a suitable
stand. (See page 7-27.)
2. Confirm the rear wheel is off the
ground and the rear shock ab-
sorber is fully extended.
3. Shift the transmission into neutral.
4. Pull up the drive chain until the
chain is taut, and then measure
distance A between the top of the
swingarm and the bottom of the
chain as shown.
7
1. Distance A
Distance A:
43.0–53.0 mm (1.69–2.09 in)
5. If the drive chain slack is incorrect,
adjust it as follows. NOTICE: Im-
proper drive chain slack will
overload the engine as well as
other vital parts of the motorcy-
cle and can lead to chain slip-
page or breakage. To prevent
this from occurring, keep the
drive chain slack within the
specified limits.
EAU22762
EAU84400
1
[ECA10572]
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
1
1. Axle nut
2. Locknut
2. To tighten the drive chain, turn the
drive chain slack adjusting bolt on
each side of the swingarm in di-
rection (a). To loosen the drive
chain, turn the adjusting bolt on
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
1. Drive chain slack adjusting bolt
7-21
EAU84060
2
1
(a)
(b)