Adjusting The Chain Tension; Checking The Chain, Rear Sprocket, Engine Sprocket And Chain Guide - KTM 450 EXC EU Owner's Manual

12 SERVICE WORK ON THE CHASSIS
12.39

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.
12.40

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

Finishing work
–
Remove the motorcycle from the lift stand. (
Preparatory work
–
Raise the motorcycle with the lift stand. (
–
Check the chain tension. (
Main work
–
Loosen nut
–
Loosen nuts
–
Adjust the chain tension by turning adjusting screws
Guideline
Chain tension
Turn adjusting screws
and right chain adjusters are in the same position relative to the reference
marks
A
–
Tighten nuts
–
Make sure that the chain adjusters
screws .
3
–
Tighten nut
Guideline
Nut, rear wheel spindle
Info
The wide adjustment range of the chain adjusters (32 mm (1.26 in))
B01534-10
enables different secondary ratios with the same chain length.
Chain adjusters
Finishing work
–
Remove the motorcycle from the lift stand. (
Preparatory work
–
Raise the motorcycle with the lift stand. (
Main work
–
Shift gear to neutral.
–
Check the rear sprocket and engine sprocket for wear.
» If the rear sprocket or engine sprocket is worn:
–
Change the power set.
400227-01
p. 74)
.
1
.
2
on the left and right so that the markings on the left
3
. The rear wheel is then correctly aligned.
.
2
4
.
1
can be turned by 180°.
4
x
Info
The engine sprocket, rear sprocket and chain should always be
replaced together.
p. 56)
p. 56)
left and right.
3
55... 58 mm (2.17... 2.28 in)
are fitted correctly on the adjusting
M20x1.5 80 Nm (59 lbf ft)
p. 56)
p. 56)
75