Check Chain Tension; Correct Chain Tension - KTM 250 XC-F Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE
B
1
2
4
3

Check chain tension

Jack the motorcycle up on its frame so that the rear wheel no longer touches
A
the ground.
Press the chain upward at the end of the chain sliding component. The
distance between the chain and the swing arm should be approx. 8 - 10 mm
(0.31 - 0.39 in). In the course of this procedure, the upper chain portion [A]
must be taut (see drawing). If necessary, correct the chain tension.
– Excessive tensioning of the chain will put additional load on the compo-
– Too much slack in the chain, on the other hand, can result in the chain
– In either case the operator is likely to lose control of the motorcycle.

Correct chain tension

Loosen collar nut [1], loosen lock nuts [2], and turn right and left adjusting
3
screws [3] equally far. Tighten lock nuts.
To ensure the correct alignment of the rear wheel, the marks at the left and
2
right chain adjusters must be positioned identically in relation to the
reference marks [B]. Tighten the counter nut of the adjusting screws.
Clean and grease the adjusting screws regularly (Motorex Long Term Grease
2000). Before tightening the collar nut, verify that the chain adjusters [4] are
sitting close to the adjusting screws and that the rear wheel has been aligned
with the front wheel.
4 Tighten collar nut [1] to 80 Nm.
– If you don't happen to have a torque wrench at hand, make sure you have
– Tighten the collar nut with the required torque. A loose wheel spindle may
B
NOTE:
The large adjusting range of the chain adjusters (32mm) allows you to use
different secondary ratios in combination with the same chain length. The
chain adjusters [4] can be rotated by 180°.
nents of the secondary drivetrain (chain, bearings of transmission and rear
wheel). Aside from resulting premature wear, if worst comes to worst the
chain may rupture or the countershaft of the transmission may break.
jumping off the chain wheels. If this happens, the chain could also block
the rear wheel or damage the engine.
the tightening torque corrected by a KTM dealer as soon as possible. A
loose axle may lead to an unstable driving behavior of your motorcycle.
lead to an unstable behavior of your motorcycle.
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