KTM 640 Duke, Owner'S Handbook Manual

Page: 22 / 52

ENGLISH
20
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. 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
approximately 2 mm.
Loosen the allan head screw
1
at the adjustment ring
2
. Use the special
wrench
3
from the tool set to turn the adjusting ring as required. Place the
adjusting ring in a suitable position, and tighten the allan head screw with
8 Nm (6 ft.lb).
ADJUSTMENT VALUES - SPRING PRELOAD:
Minimum preload...............................................................10 mm
Preload driver only 75 kg BASIC SETTING ..........................23 mm
Preload with passenger.......................................................28 mm
A
= spring preload
Checking the rubber ring of the 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 absor-
bing quality.
Measure the distance between the two discs at various points around their
circumferences. The space should be at least 2.5 mm wide. Have the rubber
ring replaced in a KTM garage when compaction due to wear has exceeded
the limit.
!
CAUTION
!
N
OT REPLACING THE RUBBER RING IN TIME CAN RESULT IN DAMAGE TO THE SHOCK
ABSORBER
.
WARNING
T
HE DAMPING UNIT OF THE SHOCK ABSORBER IS FILLED WITH HIGHLY COMPRESSED
NITROGEN
. N
EVER TRY TO TAKE THE SHOCK ABSORBER APART OR TO DO ANY MAINTEN
-
ANCE WORK YOURSELF
. S
EVERE INJURIES COULD BE THE RESULT
.
Lubricating the shock absorber linkage
The bearings in the rocker arm must be greased in regular intervals. For this
purpose, a grease nipple
4
is mounted on the rocker arm.
! CAUTION !
A
FTER EACH TIME THE MOTORCYCLE IS WASHED
,
IT IS ESPECIALLY IMPORTANT TO
GREASE THE GREASE NIPPLE TO PUSH ANY WATER OUT OF THE BEARINGS
.
min. 2,5 mm
A
1
2
3
4