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

11 SERVICE WORK ON THE CHASSIS
11.39

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

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.
101430-10
–
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 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 ratios with the same chain length.
Chain adjusters
B00825-10
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 and engine sprocket are worn:
–
Change the rear sprocket or engine sprocket.
400227-01
.
A
must be taut.
1
.
2
.
3
on the left and right so that the markings on the left
4
.
3
are fitted correctly on adjusting screws
5
.
2
can be turned by 180°.
5
Info
The engine sprocket, rear sprocket, and chain should always be
changed together.
B
to the left and right.
4
55... 58 mm (2.17... 2.28 in)
M20x1.5 80 Nm (59 lbf ft)
p. 46)
p. 46)
x
65
.
.
B
.
4