Tires, Air Pressure; Checking Spoke Tension; Changing The Wheel Size - KTM 640 LC4 SUPERMOTO 2003 Owner's Manual

TIRES - AIR PRESSURE
640 LC4
Road, driver only
Road, with passenger 2,0 bar (29 psi) 2,2 bar (31psi)
640 LC4 Supermoto
Road, driver only
Road, with passenger 2,2 bar (31psi) 2,4 bar (34psi)
30
10 sec
front rear
1,8 bar (26psi) 2,0 bar (29psi)
front rear
2,0 bar (29psi) 2,2 bar (31psi)

Tires, air pressure

Tire type, tire condition, and how much air pressure the tires have in them
affect the way your motorcycle rides, and they must therefore be checked
whenever you're getting ready to go anywhere on your motorcycle.
WARNING
I
N ORDER TO ENSURE RIDING SAFETY AND OPTIMAL RIDING PERFORMANCE
. O
APPROVED TIRES MAY BE USED
( . .
PERFORMANCE E G VIBRATION AT HIGHER SPEEDS
Approved tires for 640 LC4 (as of July 2002)
BRIDGESTONE . . . . . . . . . .TW 301/302
METZELER . . . . . . . . . . . . . .E
MICHELIN . . . . . . . . . . . . . .S
PIRELLI . . . . . . . . . . . . . . . .MT21, MT60, MT70, MT90
– Tire type and size can be found in the technical specifications and in the
homologation certificate
– Tire condition has to be checked every time you want to ride your
motorcycle. Before leaving check for punctures and nails or other sharp
objects that might have become embedded in the tire.
– Refer to the specific regulations in your country for minimum tire tread
requirements. We recommend replacing tires at the latest when the
tread is down to 2 mm.
– Tire pressure should be checked regularly on a "cold" tire. Proper pres-
sure ensures optimum driving comfort and extends the life of your tires.
WARNING
– D
O NOT MOUNT TIRES WHICH HAVE NOT BEEN APPROVED BY
COULD HAVE ADVERSE EFFECTS ON THE WAY YOUR MOTORCYCLE RIDES
– U
SE TIRES OF THE SAME BRAND AND TYPE FOR THE FRONT AND REAR WHEELS
– F
OR YOUR OWN SAFETY REPLACE DAMAGED TIRES IMMEDIATELY
– W
ORN TIRES CAN HAVE A NEGATIVE EFFECT ON HOW YOUR MOTORCYCLE
,
PERFORMS ESPECIALLY ON WET SURFACES
– I
F AIR PRESSURE IS TOO LOW
CAN RESULT

Checking spoke tension

The correct spoke tension is very important for the stability of the wheels
and thus for riding safety. A loose spoke causes the wheel to become un-
balanced and before long other spokes will have come loose. Check spoke
tension, especially on a new motorcycle, in regular intervals. For checking,
tap on each spoke with the blade of a screw driver (see illustration). A clear
tone must be the result. Dull tones indicate loose spokes. If necessary, have
the spokes retightened and the wheel centered by a KTM dealer.
WARNING
– S
POKES CAN TEAR IF YOU CONTINUE TO RIDE WITH THEM LOOSE
AN UNSTABLE HANDLING OF YOUR MOTORCYCLE
– E
XCESSIVELY TENSIONED SPOKES MAY RUPTURE DUE TO LOCAL OVERLOADING
SPOKES MUST BE TENSIONED TO

Changing the wheel size

The preset wheel diameter (21, 19 or 17") and the respective wheel circum-
ference (2205, 2040 or 1882 mm) are displayed briefly when the ignition is
switched on.
To change the wheel diameter, switch on the ignition, change to the ODO
mode and press the MODE and SET buttons simultaneously for approx. 10
seconds. The display will start to blink. Select the wheel diameter using the
MODE button, press the SET button to confirm and save the setting.
THER TIRES CAN HAVE A NEGATIVE EFFECT ON RIDING
).
3, E 4, K
NDURO NDURO AROO
, T63
IRAC
KTM. O
.
,
ABNORMAL WEAR AND OVERHEATING OF THE TIRE
. T
.
4 N .
M
, KTM-
ONLY
THER TIRES
.
.
HIS MAY LEAD TO
.T
HE