KTM 450 SMR - Manual (Page 38)

MAINTENANCE WORK ON CHASSIS AND ENGINE
36
Adjusting the chain tension
Warning
Danger of accidents ಗDanger caused by incorrect chain tension.
ಥ 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. 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.
ಥ Jack up the motorcycle. ( P. 21)
500192-10
ಥ Push the chain at the end of the chain sliding component upwards to measure
chain tension
‘ .
Info
The upper chain section ‘ must be taut.
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
500193-10
ಥ Loosen nut ‘ .
ಥ Loosen nuts ‘ .
ಥ Adjust the chain tension by turning the left and right adjusting screws ‘ .
Specification
Chain tension 8… 10 ‘mm (0.31… 0.39‘in)
Turn the left and right adjusting screws ‘ 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.
ಥ Tighten nuts ‘ .
ಥ Make sure that chain adjusters ‘ are fitted correctly on the adjusting screws ‘ .
ಥ Tighten nut ‘ .
Specification
Nut, rear wheel spindle M20x1,5 80 ‘Nm
(59.01 ‘lbf‘ft)
Info
The wide adjustment range of the chain adjusters (32 mm) enables different
secondary transmissions with the same chain length.
Chain adjusters
‘ can be turned by 180°.
ಥ Remove the motorcycle from the work stand. ( P. 21)