Checking Rear Sprocket / Engine Sprocket For Wear; Checking Chain Wear; Adjusting Chain Tension - KTM 450 SX-F Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE

Checking rear sprocket / engine sprocket for wear

8.46

Checking chain wear

8.47
0 0 A A
0 0 0 B B
1 2 3 16 17 18

Adjusting chain tension

8.48
Warning
Danger of accidents Danger caused by incorrect chain tension.
–
If the chain tension is too high, the components of the secondary power train (chain, engine sprocket, rear sprocket, bearings
in transmission and rear wheel) are under additional load. Apart from premature wear, in extreme cases the chain can
rupture or the countershaft of the transmission can break. On the other hand, if the chain is loose, it can fall off the engine
sprocket or the rear sprocket and block the rear wheel or damage the engine. Check for correct chain tension and adjust if
necessary.
–
Check rear sprocket / engine sprocket for wear.
> If the rear sprocket / engine sprocket are worn:
–
Replace rear sprocket / engine sprocket.
–
Check rear sprocket guides to see whether they are firmly seated.
400227-01
–
Jack up the motorcycle. (
–
Shift to neutral and pull the upper chain length with the specified tension
Rules
Chain tension
–
Measure the distance
Info
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Maximum distance
chain section:
> If the distance
–
Replace the chain.
–
Remove the motorcycle from the work stand. (
400226-10
–
Jack up the motorcycle. (
–
Push the chain at the end of the chain sliding component upwards to measure the
chain tension
Info
The upper chain section
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
400213-10
Info
When fitting the chain joint, always make sure that the closed side of
the joint faces forward (riding direction).
The engine sprocket, rear sprocket and chain should always be
replaced together.
20)
of 18 chain links in the lower chain section.
B
at the longest
B
is greater than the specified measurement:
B
Info
When you replace the chain, you should also replace rear sprocket
and engine sprocket.
New chains wear out faster on old, worn sprockets.
20)
.
A
must be taut.
1
10...15 kg (22.05...33.07 lb.)
272 mm (10.71 in)
20)
35
.
A