KTM 990 - Manual (Page 22)

OPERATION INSTRUMENTS
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Damping action during compression of shock absorber
The shock absorber's damping action during compression travel (compression damping) can
be adjusted. This allows you adjust the shock absorber's damping behavior to match your
driving style and the payload.
The damping rate can be adjusted in the low and high-speed range (Dual Compression Control).
The designation low and high-speed refers to the movement of the shock absorber and not
to the motorcycle's driving speed.
The adjusting screw [1] for the low-speed range can be adjusted with a screwdriver.
The adjusting screw [2] for the high-speed range can be adjusted with a 17 mm socket wrench.
More information is provided in the chapter "Adjusting the fork and shock absorber.“