Checking And Adjusting The Steering Head Bearing; Changing The Spring Preload Of The Shock Absorber - KTM DUKE 640 e Owner's Handbook Manual

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Checking and adjusting the steering head bearing*

Check steering head bearing for play periodicaly. To check this, put
motorcycle on stand so that the front wheel is off the ground. Now try to
move the fork forward and backward - no play should be discernable To
adjust, loosen the five clamp screws
ring stem bolt clockwise
2
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 tap on the top triple clamp to release ten-
sion. Re-tight the five clamp screws to 25 Nm (18 ft.lb).
WARNING
I
F THE STEERING HEAD BEARING IS NOT ADJUSTED TO BE FREE OF PLAY
WILL SHOW AN UNSTEADY DRIVING PERFORMANCE AND CAN GET OUT OF CONTROL
!
I
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.

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 con-
siderably 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
approximately 2 mm.
Loosen the allan head screw
6
wrench
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.
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
1
of the top triple clamp and turn stee-
,
CAUTION
5
changes the spring preload by
4
5
at the adjustment ring
. Use the special
THE MOTORCYCLE
.
!
,
FIRSTLY
.
17

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