Checking And Adjusting Steering Head Bearing; Breather Plug Front Fork; Cleaning The Dust Sleeves Of The Telescopic Fork - KTM 640 LC4 SUPERMOTO 2003 Owner's Manual

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Checking and adjusting steering head bearing *

Check steering head bearing for play periodicaly. To check this put
motorcycle on a stand so that the front wheel is off the ground. Now try to
move the fork forward and backward. To adjust, loosen the five clamp
screws 1 of the top triple clamp and turn steering stem bolt clockwise
until there is no more play. Don't tighten the steering stem bolt all the way,
otherwise the bearings will be damaged. With a plastic hammer, lightly rap
on the triple clamp to avoid tension. Re-tighten the five clamp screws with
15 Nm (11 ft.lb).
WARNING
I
F THE STEERING HEAD BEARING IS NOT ADJUSTED TO BE FREE OF PLAY
CYCLE WILL SHOW AN UNSTEADY DRIVING PERFORMANCE AND CAN GET OUT OF
.
CONTROL
!
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F YOU DRIVE WITH PLAY IN THE STEERING HEAD BEARING FOR LONGER PERIODS
THE BEARINGS AND THEN THE BEARING SEATS IN THE FRAME WILL BE DESTROYED
At least once a year, the steering head bearings should be greased.

Breather plug front fork

After every 5 hours of use for competitive racing, slacken the breather
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plugs 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 mainten-
ance service.
!
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XCESSIVE PRESSURE IN THE INTERIOR OF THE FORK CAN CAUSE LEAKS IN THE FORK
,
YOUR FORK IS LEAKING IT IS RECOMMENDED TO OPEN THE BREATHER PLUGS BEFORE
.
HAVING THE SEALS REPLACED

Cleaning the dust sleeves of the telescopic fork

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The dust-protection bellows
from the fork tube. However, after some time, dirt may also get in behind
the dust-protection bellows. If this dirt is not removed, the oil sealing rings
located behind it may start to leak.
Use a screwdriver to lever the dust-protection bellows out of the outer
tubes and slide them downward.
Clean dust-protection bellows, outer tubes, and fork tubes thoroughly, and
oil them thoroughly with silicone spray. Then, push dust-protection bellows
into the outer tubes by hand.
CAUTION
CAUTION
are to remove dust and coarse dirt particles
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