KTM 450 EXC - Checking the Chain Tension; Adjusting the Chain Tension

12 SERVICE WORK ON THE CHASSIS 73
12.37 Checking the chain tension
Warning
Danger of accidents Danger caused by incorrect chain tension.
– If the chain is too taut, the components of the secondary power transmission (chain, engine sprocket, rear sprocket, bear-
ings in the transmission and in the rear wheel) will be under additional load. In addition to premature wear, this can cause
the chain or the countershaft of the transmission to break in extreme cases. If the chain is too loose, however, it may fall
off the engine sprocket or rear sprocket and block the rear wheel or damage the engine. Ensure that the chain tension is
correct and adjust it if necessary.
Preparatory work
– Raise the motorcycle with the lift stand. ( p. 50)
M00102-10
Main work
– Pull the chain at the end of the chain sliding component upwards to measure chain
tension

.
Info
The lower chain section

must be taut.
When the chain guard is mounted, it must be possible to pull up the chain
at least to the point where it makes contact with chain guard

.
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Chain tension 55… 58 mm (2.17… 2.28 in)
» If the chain tension does not meet specifications:
– Adjust the chain tension. ( p. 73)
Finishing work
– Remove the motorcycle from the lift stand. ( p. 50)
12.38 Adjusting the chain tension
Warning
Danger of accidents Danger caused by incorrect chain tension.
– If the chain is too taut, the components of the secondary power transmission (chain, engine sprocket, rear sprocket, bear-
ings in the transmission and in the rear wheel) will be under additional load. In addition to premature wear, this can cause
the chain or the countershaft of the transmission to break in extreme cases. If the chain is too loose, however, it may fall
off the engine sprocket or rear sprocket and block the rear wheel or damage the engine. Ensure that the chain tension is
correct and adjust it if necessary.
Preparatory work
– Raise the motorcycle with the lift stand. ( p. 50)
– Check the chain tension. ( p. 73)