Checking The Chain, Rear Sprocket, And Engine Sprocket - KTM 390 DUKE 2024 Owner's Manual

12 SERVICE WORK ON THE CHASSIS
12.14
72

Checking the chain, rear sprocket, and engine sprocket

100132-10
401288-10
Preparatory work
–
Raise the motorcycle with the rear lifting gear. (
Main work
–
Check the rear sprocket and the engine sprocket for wear.
» If the rear sprocket and engine sprocket are worn:
–
Change the drivetrain kit.
Info
The engine sprocket, rear sprocket and chain
should always be replaced together.
–
Shift the transmission into neutral.
–
Pull on the lower chain section with specified weight
Guideline
Weight, chain wear measure-
ment
–
B
Measure distance of 20 chain rollers in the lower chain
section.
Info
Chain wear is not always even, so repeat this measure-
ment at different positions on the chain.
B
Maximum distance from
20 chain rollers at the
longest chain section
»
B
If distance is greater than the specified measurement:
–
Change the drivetrain kit.
Info
When a new chain is mounted, the rear sprocket
and the engine sprocket should also be
changed.
New chains wear out faster on old, worn sprock-
ets.
p. 66)
A
.
15 kg (33 lb.)
301.6 mm (11.874 in)