Checking The Basic Setup Of The Telescopic Fork; Changing The Spring Preload On The Telescopic Fork - KTM 125 SX Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE
MODELL SOFTER
12187A01
69-250
125 SX
12187A02
69-250
125/200 EXC
12187A03
72-250
250 MX
12187A04
72-250
250/300 MXC, EXC
According to our experience, the damping rate of the compression stage can
STANDARD HARDER
remain unchanged. The damping rate of the rebound stage can be reduced
by a few clicks for a softer spring or increased by a few clicks for a harder
72-250 76-250
spring.
72-250 76-250
76-250 80-250
76-250 80-250

Checking the basic setup of the telescopic fork

The precise riding sag of the telescopic fork cannot be determined for vari-
ous reasons. Similar to the shock absorber, smaller deviations in your weight
can be compensated by adjusting the spring preload. However, if your tele-
scopic fork bumps frequently (hard end stop during compression), you should
install harder fork springs to avoid damaging the telescopic fork and frame.
Changing the spring preload on the telescopic fork (SX models)
The telescopic forks on the SX models are equipped with a preload adjuster.
You can easily adjust the spring preload by 10 mm by turning the adjusting
screw [1].
Turning in a clockwise direction will increase the prestress, turning in a coun-
terclockwise direction will decrease the prestress.
Changing the spring preload will not affect the rebound damping adjustment.
1
Generally, if the spring preload is higher, the rebound damping should also
be set higher.
STANDARD SETTING:
Unscrew the adjusting screw to the limit and then back 2 turns.

Changing the spring preload on the telescopic fork

(MXC/EXC models)
The telescopic forks for these models must be partly disassembled to adjust
the spring preload (see WP manual). Pretension spacers are available in
heights of 1.5, 2.5 and 5 mm (see spare parts catalog). The fork springs may
not be pretensioned by more than 20 mm.
The preload adjuster used in the SX models can easily be retrofitted for the
telescopic forks of the MXC/EXC models.
NOTE:
WP precisely adjusts the spring pressure by inserting pretension spacers.
Fluctuations in production are compensated with pretension spacers in vari-
ous heights. This can cause the fork springs in the fork legs to have different
degrees of pretension. Fork springs and pretension spacers should always stay
together.
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