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KTM 400 SX - Front Fork and Steering Head Maintenance

KTM 400 SX
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ENGLISH
16
Tool set (SC)
The tool set 1 is located at the bottom of the seat.
Tool set (EGS)
The tool set 2 is located in the tool box under the right side cover.
Breather plug front fork
After every 5 hours of use for competitive racing, slacken the breather plugs 3 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 street, it will be enough to have this job
performed in the course of the periodical maintenance service.
!
CAUTION
!
E
XCESSIVE 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 HAVING THE
SEALS REPLACED
.
Check and adjust steering head bearing*
Check steering head bearing for play periodically. To check this put motorcycle on
a stand so that the front wheel is off the ground. Now try to move the fork for-
ward and backward. To adjust, loosen the five pinch bolts
4 of the top triple
clamp and turn steering stem bolt clockwise
5 until there is no more play. Don’t
tighten the steering stem bolt all the way, otherwise the bearings will be dama-
ged. With a plastic hammer, lightly rap on the triple clamp to release tension. Re-
tight the five pinch bolts.
WP Extreme fork:.................................15 Nm
WP USD (UpSideDown) fork:...............15 Nm
WARNING
I
F THE STEERING HEAD BEARING IS NOT ADJUSTED TO BE FREE OF PLAY
,
THE MOTORCYCLE WILL
SHOW AN UNSTEADY DRIVING PERFORMANCE AND CAN GET OUT OF CONTROL
.
!
CAUTION
!
I
F YOU DRIVE WITH PLAY IN THE STEERING HEAD BEARING FOR LONGER PERIODS
,
FIRST THE BEA
-
RINGS AND THEN THE BEARING SEATS IN THE FRAME WILL BE DESTROYED
.
At least once a year, the steering head bearings should be smeared with water-
proof grease.
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