Checking The Chain Tension; Checking Chain Tension When Fitting Rear Wheel - KTM 450 EXC Owner's Manual

SERVICE WORK ON THE CHASSIS

Checking the chain tension

10.34
Warning
Danger of accidents Danger caused by incorrect chain tension.
–
If the chain tension is too high, the components of the secondary power train (chain, engine sprocket, rear sprocket, bear-
ings in transmission and rear wheel) are under additional load. Apart from premature wear, in extreme cases the chain can
rupture or the countershaft of the transmission can break. On the other hand, if the chain is loose, it can fall off the engine
sprocket or the rear sprocket and block the rear wheel or damage the engine. Check the chain tension and correct if neces-
sary.

Checking chain tension when fitting rear wheel

10.35
Warning
Danger of accidents Danger caused by incorrect chain tension.
–
If the chain tension is too high, the components of the secondary power train (chain, engine sprocket, rear sprocket, bear-
ings in transmission and rear wheel) are under additional load. Apart from premature wear, in extreme cases the chain can
rupture or the countershaft of the transmission can break. On the other hand, if the chain is loose, it can fall off the engine
sprocket or the rear sprocket and block the rear wheel or damage the engine. Check the chain tension and correct if neces-
sary.
–
Clean the chain regularly and then treat with chain spray.
Chain cleaner (
Off-road chain spray (
400725-01
–
Raise the motorcycle with the lift stand. (
–
Push the chain up at the rear edge of the chain guide to measure the chain ten-
sion .

Info
The upper chain section
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Chain tension
400213-10
» If the chain tension does not meet specifications:
–
Adjusting chain tension - after checking. (
–
Remove the motorcycle from the lift stand. (
–
Make sure that the chain adjusters are fitted correctly on the adjusting screws.
–
Push the chain up at the rear edge of the chain guide to measure the chain ten-
sion .

Info
The upper chain section
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Chain tension
400213-10
» If the chain tension does not meet specifications:
–
Adjust the chain tension when fitting rear wheel. (
p. 110)
p. 110)
p. 44)
must be taut.

8... 10 mm (0.31... 0.39 in)
p. 44)
must be taut.

8... 10 mm (0.31... 0.39 in)
55
p. 57)
p. 57)