Yamaha MTM690 Owner's Manual page 70

Periodic maintenance and adjustment
1
2
1. Drive chain guide
2. Drive chain slack
Distance A:
6
51.0–56.0 mm (2.01–2.20 in)
5. If distance A is incorrect, adjust it
as follows. NOTICE: Improper
drive chain slack will overload
the engine as well as other vital
parts of the motorcycle and can
lead to chain slippage or break-
age. If distance A is more than
58.0 mm (2.28 in), the chain can
damage the frame, swingarm,
and other parts. To prevent this
from occurring, keep the drive
chain slack within the specified
limits.
[ECA23070]
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Loosen the locknut at each end of
the swingarm, and then loosen the
axle nut.
1
1. Axle nut
2. Locknut
2. To tighten the drive chain, turn the
drive chain slack adjusting nut at
each end of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting nut at each end
of the swingarm in direction (b),
and then push the rear wheel for-
ward.
6-23
EAU59921
2
1. Drive chain slack adjusting nut
TIP
Using the alignment marks on each
side of the swingarm, make sure that
both drive chain slack adjusting plates
are in the same position for proper
wheel alignment.
1
1. Alignment marks
2. Drive chain slack adjusting plate
1
(a)
(b)
2