Checking The Chain Tension; Checking The Chain, Rear Sprocket, Engine Sprocket And Chain Guide - KTM 125 ECX EU Owner's Manual

SERVICE WORK ON THE CHASSIS

Checking the chain tension

10.38
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 the chain, rear sprocket, engine sprocket and chain guide

10.39
–
Raise the motorcycle with the lift stand. (
–
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. (
–
Remove the motorcycle from the lift stand. (
101430-10
–
Raise the motorcycle with the lift stand. (
–
Shift gear to neutral.
–
Check the rear sprocket and engine sprocket for wear.
» If the rear sprocket and engine sprocket are worn:
–
Change the rear sprocket or engine sprocket.
400227-01
.

must be taut.

p. 63)
Info
The engine sprocket, rear sprocket, and chain should always be
changed together.
p. 44)
.

55... 58 mm (2.17... 2.28 in)
p. 44)
p. 44)
x
61