Adjusting Chain Tension - KTM 450 SX-F EU 2010 Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE

Adjusting chain tension

9.46
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.
–
Jack up the motorcycle. (
–
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.
400213-10
–
Loosen nut
–
Loosen nuts
–
Adjust the chain tension by turning the adjusting screws
Guideline
Chain tension
Turn adjusting screws
and right chain adjusters are in the same position relative to the reference
marks . The rear wheel is then correctly aligned.

–
Tighten nuts
–
Make sure that chain adjusters
–
Tighten nut
Guideline
Nut, rear wheel spindle
Info
The wide adjustment range of the chain adjusters (32 mm) enables different
secondary transmissions with the same chain length.
Chain adjusters
400225-10
–
Remove the motorcycle from the work stand. (
p. 24)
must be taut.

.

.

on the left and right so that the markings on the left

.

are fitted correctly on adjusting screws

.

can be turned by 180°.

left and right.

8... 10 mm (0.31... 0.39 in)
M20x1.5 80 Nm (59 lbf ft)
p. 24)
40
.
