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MAINTENANCE WORK ON CHASSIS AND ENGINE »
Changing the spring preload of the shock absorber
KTM sets the shock absorber for a driver only, weighing approximately 75 kg
(165 lb). If you want to take a passenger with you, of if you weigh
considerably more or less than 75 kg (165 lb), you should change the spring
preload accordingly [A]. This is easily done.
NOTE:
– Before changing the spring preload note down the basic setting, e.g. how
many threads are visible above the adjusting ring.
– One rotation of the adjusting ring [2] changes the spring preload by approx-
imately 1.75 mm (0.07 in).
Loosen the locking ring [1] with the hook wrench from the tool set. Change
the spring preload with the adjusting ring [2] and retighten the locking ring.
BASIC SETTING – SPRING PRELOAD:
WP 01187B03........................A = 23,5 mm (640 LC4 Enduro)
WP 01187B02........................A = 20 mm (640 LC4 Supermoto)
Lubricating the shock absorber linkage
The bearings in the rocker arm must be greased (Motorex Long Term 2000)
in regular intervals. For this purpose, a grease nipple [3] is mounted on the
rocker arm.
AFTER EACH TIME THE MOTORCYCLE IS WASHED, IT IS ESPECIALLY IMPORTANT
TO GREASE THE GREASE NIPPLE TO PUSH ANY WATER OUT OF THE BEARINGS.
Checking rubber ring on the WP rear shock absorber
A rubber ring mounted on the rear shock absorber serves as a vibration damper.
This ring gets pressed together with time and loses its shock absorbing
quality.
Measure the distance between the two discs at various points around their
circumferences. The space should be at least 2.5 mm (0.1 in) wide. Have
the rubber ring replaced by an KTM dealer when compaction due to wear has
exceeded this lower limit.
NOT REPLACING THE RUBBER RING IN TIME CAN RESULT IN DAMAGE TO THE
REAR SHOCK ABSORBER.
THE DAMPING UNIT OF THE SHOCK ABSORBER IS FILLED WITH HIGH COM-
PRESSED NITROGEN. NEVER TRY TO TAKE THE SHOCK ABSORBER APART OR TO
DO ANY MAINTENANCE WORK YOURSELF. SEVERE INJURIES COULD BE THE
RESULT.
A
min. 2,5 mm
1
2
3