Suzuki GSX1300BK Owner's Manual page 75

To set the rebound damping force adjuster
to the standard position, turn the adjuster
clockwise until it stops and then turn it coun-
terclockwise 2 turns until the two punch
marks align. If the two punch marks do not
align by turning out 2 turns, turn in or out the
adjuster until two punch marks align.
Turn the adjuster clockwise from the stan-
dard position to stiffen the damping force.
Turn the adjuster counterclockwise to soften
the damping force. The damping force
should be adjusted gradually, 1/8 turn at a
time, to fine-tune the suspension.
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