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

MAINTENANCE WORK ON THE CHASSIS

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

11.38
A 0 0 A
B 0 0 0 B
1 2 3 16 17 18
–
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 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
B00343-11
–
Remove the motorcycle from the lift stand. (
–
Raise the motorcycle with the lift stand. (
–
Shift gear to neutral.
–
Check the rear sprocket and engine sprocket for wear.
» If the rear sprocket or engine sprocket is worn:
–
Change the rear sprocket or engine sprocket.
400227-01
–
Pull on the upper part of the chain with the specified weight
Guideline
Weight, chain wear measurement
–
Measure the distance
Info
Chain wear is not always even; repeat this measurement at different chain
positions.
Maximum distance
chain section
» If the distance
–
Change the chain.
400987-10
.

.

on the left and right so that the markings on the left

.

are fitted correctly on adjusting screws

.

can be turned by 180°.

Info
The engine sprocket, rear sprocket and chain should always be
changed together.
of 18 chain links in the lower chain section.

at the longest

is greater than the specified measurement:

x
Info
When you mount a new chain, you should also change the rear
sprocket and engine sprocket.
New chains wear out faster on old, worn sprockets.
to the left and right.

55... 58 mm (2.17... 2.28 in)
M20x1.5 80 Nm (59 lbf ft)
p. 37)
p. 37)
x
.

10... 15 kg (22... 33 lb.)
272 mm (10.71 in)
51
.

.
