User Guide

Repair manual KTM 250-525 SX, MXC, EXC RACING Art.-No. 3206007 -E
5-16C
Timing chain tensioner
– Pull the pressure pin of the timing chain tensioner out all the way and
check whether or not it moves smoothly.
– Check the toothing on the pressure pin and the ratcheting pawl for
wear.
– For mounting, push the ratchet in the direction of the arrow so that
the pressure pin will no longer be locked and push the pressure pin all
the way into the tensioner housing.
Timing train
Clean all components thoroughly and check them for wear.
Timing gear
1
Check the toothing for broken-off parts and wear.
Timing chain tensioner rail
2
Check for seizing marks at the contact surface.
Timing chain guide
3
Check for seizing marks at the contact surface.
Rivet link
4
The opened rivet link of the timing chain must be replaced.
1
3
4
2
LOCTITE 243
Modell 450 SX
2