Adjusting The Drive Chain Slack - Yamaha YFM250RX 2008 Service Manual

ADJUSTING THE DRIVE CHAIN SLACK

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ADJUSTING THE DRIVE CHAIN SLACK
NOTE: NOTE:
• Measure the drive chain slack halfway
between the drive axle and the rear axle.
• When checking and adjusting the drive chain
slack, there should be no weight on the vehi-
cle and all tires must be touching the ground.
CAUTION:
A drive chain that is too tight will overload
the engine and other vital parts, and one
that is too loose can skip and damage the
swingarm or cause an accident. Therefore,
keep the drive chain slack within the speci-
fied limits.
1. Measure:
• drive chain slack
Out of specification → Adjust.
Drive chain slack
45 ~ 55 mm (1.77 ~ 2.17 in)
2. Adjust:
• drive chain slack
NOTE: NOTE:
The drive chain slack is adjusted by the rota-
tion of the rear axle hub.
a. Loosen the rear axle pinch bolts
b. Insert a rod of a diameter of 8 mm (0.31 in)
and length of 10 cm (4 in)
of rear axle hub .
c. Shift the transmission into the neutral posi-
tion.
d. To loosen the drive chain, push the vehicle
forward and to tighten the drive chain, pull
the vehicle backward.
CHK
ADJ
.
in the hole