Correct Chain Tension; Checking Chain Tension - KTM 625 SXC Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE
A
4
2
3

Checking chain tension

To check, jack up the motorcycle on the center stand or frame until it no
longer touches the ground.
Press the chain up approx. 30 mm behind the end of the chain sliding
component. The chain should barely touch the swing arm when the upper
chain part [A] is tensioned. If not, correct the chain tension.
– If chain tension is too high, parts within the secondary transmission (chain,
sprockets, drive assembly and rear wheel bearings) will be subjected to
unnecessary stress, resulting in premature wear and even chain breakage.
– Too much slack in the chain, on the other hand, can result in the chain
jumping off the sprockets. If this happens, the chain could also block the
rear wheel or damage the engine.
– In either case the operator is likely to lose control of the motorcycle.

Correct chain tension

3
Loosen collar nut [1], loosen lock nuts [2], and turn right and left adjusting
screws [3] equally far. Tighten lock nuts [2].
Before tightening the collar nut, verify that the chain adjusters [4] are
2 sitting close to the adjusting screws and that the rear wheel has been
aligned with the front wheel.
Tighten collar nut [1] with 80 Nm (59 ft.lb).
If you don't happen to have a torque wrench at hand, make sure you have the
1
tightening torque corrected by a KTM dealer as soon as possible. A loose axle
may lead to an unstable driving behavior of your motorcycle.
NOTE:
The large adjusting range of the chain adjusters (32mm) allows you to use
different secondary ratios in combination with the same chain length. The
chain adjusters [4] can be rotated by 180°.
4
»
27