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Breather plug front fork
After every 5 hours of use for competitive racing, slacken the breather
plugs [2] a few turns in order to relieve excess pressure from the inside of the
fork. To do this, place the motorcycle on a stand with the front wheel lifted
off the ground. When riding the motorcycle mainly on the road, it will suffice
to have this job performed in the course of the periodical maintenance
service.
Excessive pressure in the interior of the fork can cause leaks in the fork. If
your fork is leaking, it is recommended to open the breather plugs before hav-
ing the seals replaced.
MAINTENANCE WORK ON CHASSIS AND ENGINE »
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.
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.
Your KTM dealer will be happy to offer advice.
Changing the spring preload on the telescopic fork (XC-W, EXC,
EXC Six Days, EXC-E, EXC-E Six Days)
The telescopic forks for these 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.
Generally, if the spring preload is higher, the rebound damping should also
be set higher.
STANDARD SETTING:
Turn the adjusting screw all the way to the stop in a counterclockwise direc-
tion and 2 turns in a clockwise direction.
TYPE SOFTER
STANDARD
HARDER
12187D02
63-250
66-250
69-250
12187D04
66-250
69-250
72-250
12187D27 60-250
63-250
66-250
12187D28 60-250
63-250
66-250
12187D33 63-250
66-250
69-250
12187D34 66-250
69-250
72-250
2
1
2