Checking The Chain Tension; Adjusting The Chain Tension - KTM 125 DUKE EU Repair Manual

12 WHEELS
12.5.5

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.
12.5.6

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.
–
Lean the motorcycle on the side stand.
–
Shift gear to neutral.
–
In the area of chain sliding guard, press the chain upward toward the swingarm and
determine chain tension
Info
The upper chain section
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. (
B00731-10
Preparatory work
–
Check the chain tension. (
.
A
must be taut.
B
5... 7 mm (0.2... 0.28 in)
p. 58)
p. 58)
58