Checking The Chain Tension; Adjusting The Chain Tension - KTM 125 EXC EU Owner's Manual

11 SERVICE WORK ON THE CHASSIS
11.37

Checking the chain tension

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.
11.38

Adjusting the chain tension

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
Preparatory work
–
Raise the motorcycle with the lift stand. (
Main work
–
Push the chain at the end of the chain sliding component upwards to measure
chain tension
Info
The bottom chain section
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
» If the chain tension does not meet specifications:
–
Adjust the chain tension. (
101430-10
Finishing work
–
Remove the motorcycle from the lift stand. (
Preparatory work
–
Raise the motorcycle with the lift stand. (
p. 131)
p. 131)
.
A
must be taut.
1
p. 64)
p. 46)
B
55... 58 mm (2.17... 2.28 in)
p. 46)
p. 46)
64
.