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MAINTENANCE WORK ON CHASSIS AND ENGINE »
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
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).
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.
Replacing fork springs
If you weigh less than 70 kg or more than 80 kg, you should install the respec-
tive fork springs. The correct spring rate is shown in the illustrations. The stan-
dard spring is shown in bold print. The type number of the telescopic fork is
embossed on the caps on the top of the telescopic fork.
If you are uncertain which spring to use, contact your KTM workshop.
According to our experience, the damping rate of the compression stage can
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
spring.
Changing the spring preloading of the shock absorber
KTM sets the shock absorber for a driver with a weight of approximately
75 kg (165 lb). If the weight of the driver is more or less than 75 kg (165
lb), you should change the spring preloading [A] accordingly. This is easily
done.
NOTE:
– Before changing the spring preload note the basic setting, e.g. how many
threads are visible above the adjusting ring.
– One rotation of the adjusting ring [1] changes the spring pretension by
approximately 1,75 mm (0,07 in).
Loosen the locking ring [2] with the hook spanner from the tool set. Change
the spring preload with the adjusting ring [1] and re-tighten the locking ring.
BASIC SETTING – SPRING PRELOAD:
WP 01187B02 . . . . . . A = 20 mm
60
SPRING RATE
65 70 75 80 85 90
RIDERS WEIGHT INCLUSIVE GEARS IN KILOGRAM
4,4 N/mm
4,6 N/mm
4,2 N/mm
14187B07 660 SMC
Front fork
1
2
A
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