Checking The Chain Tension; Adjusting The Chain Tension - KTM 450 SX-F EU Repair Manual

1 O/REAR WHEEL
a9
Cbeckinllhe chain tension
Warning
Danger 01 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, bear-
ings 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. Dn 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 the chain tension and correct if neces-
sary.
Warning
Prlliminary work
- Raise the motorcycle with the lift stand. ( ... p. 9)
Main work
- Push the chain at the end of the chain sliding component upwards to measure the
chain tension
• Info
I
The lower chain section must be taut.
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
I
Chain tension
I
55 ... 58 mm (2.17 ... 2.28 in)
• If the chain tension does not meet specifications:
- Adjust the chain tension. ( ... p. 89)
Subsequent work
- Remove the motorcycle from the lift stand. ( ... p. 9)
Danger 01 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, bear-
ings 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. Dn 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 the chain tension and correct if neces-
sary.
Preliminary work
- Raise the motorcycle with the lift stand. ( ... p. 9)
- Check the chain tension. ( ... p. 89)
Main work
- Loosen nut
- Loosen nuts
- Adjust the chain tension by turning the adjusting screws left and right.
Guideline
Chain tension
I
55 ... 58 mm (2.17 ... 2.28 in)
Turn adjusting screws on the left and right so that the markings on the left
and right chain adjusters are in the same position relative to the reference
marks . The rear wheel is then correctly aligned.
- Tighten nuts
- Make sure that chain adjusters are fitted correctly on adjusting screws
- Tighten nut
Guideline
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Nut, rear wheel spindle
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M20x1.5 180 Nm (59 Ibf ft)
• Info
I
The wide adjustment range of the chain adjusters (32 mm (1.18 in))
enables different secondary ratios with the same chain length.
Chain adjusters can be turned by 180·.