KTM 990 - Manual (Page 49)

Correct chain tension
Loosen collar nut [1], loosen counter nuts [2], and turn right and left adjusting screws [3]
equally far. Tighten counter nuts [2].
Before tightening the wheel spindle, 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.
Tighten collar nut [1] with 90 Nm.
If you don’t happen to have a torque wrench at hand, make sure you have 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.
MAINTENANCE WORK ON CHASSIS AND ENGINE
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