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

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

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.
I
N ORDER TO ENSURE RIDING SAFETY AND OPTIMAL RIDING PERFORMANCE
APPROVED TIRES MAY BE USED
( .
PERFORMANCE E G
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
rear
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 (0.08 in).
– Tire pressure should be checked regularly on a "cold" tire. Proper pres-
rear sure ensures optimum driving comfort and extends the life of your tires.
– 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
– N
EW WHEELS HAVE A SMOOTH SURFACE
TO ACHIEVE FULL GRIP
MODERATE SPEED DURING THE FIRST
VEHICLE AT DIFFERENT ANGLES SO THAT ALL SECTIONS ARE PROPERLY ROUGHENED
T
IRES WILL NOT DISPLAY THEIR FULL GRIP CHARACTERISTICS UNTIL THEY ARE
PROPERLY RUN IN
– F
OR REASONS OF SAFETY
WHENEVER A NEW TIRE IS MOUNTED

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.
– 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.
WARNING
. O
THER TIRES CAN HAVE A NEGATIVE EFFECT ON RIDING
. ).
VIBRATION AT HIGHER SPEEDS
3, E
NDURO NDURO
, T63
IRAC
WARNING
.
,
ABNORMAL WEAR AND OVERHEATING OF THE TIRE
,
WHICH MEANS THAT THEY MUST BE RUN IN
. F ,
OR THIS PURPOSE RIDE THE MOTORCYCLE CAREFULLY AT
200
KILOMETERS WITH NEW TIRES
.
,
IT IS RECOMMENDED TO EXCHANGE THE VALVE INSERT
.
WARNING
.
4 N .
M
, KTM-
ONLY
4, K
AROO
KTM. O
THER TIRES
.
.
.
,
TILTING THE
.
. T
HIS MAY LEAD TO
.T
HE
31