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

MAINTENANCE WORK ON CHASSIS AND ENGINE
TIRES - AIR PRESSURE 640 LC4 ENDURO
Road, Driver only
Road, with passenger 2.0 bar
TIRES - AIR PRESSURE 640 LC4 SUPERMOTO
Road, Driver only
32
Road, with passenger 2.2 bar
10 sec
front rear
1.8 bar 2.0 bar
2.2 bar
front rear
2.0 bar 2.2 bar
2.4 bar

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 when-
ever you're getting ready to go anywhere on your motorcycle.
IN ORDER TO ENSURE RIDING SAFETY AND OPTIMAL RIDING PERFORMANCE, ONLY
KTM-APPROVED TIRES MAY BE USED. OTHER TIRES CAN HAVE A NEGATIVE EFFECT
ON RIDING PERFORMANCE (E.G. VIBRATION AT HIGHER SPEEDS).
Approved tires for 640 LC4
BRIDGESTONE . . . . . . . . . . . .TW 301/302
METZELER . . . . . . . . . . . . . . .Enduro 3, Enduro 4, Karoo
MICHELIN . . . . . . . . . . . . . . .Sirac, T63
PIRELLI . . . . . . . . . . . . . . . . .MT21, MT60, MT70, MT90, Scorpion Sync
– 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 motor-
cycle. 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-
sure ensures optimum driving comfort and extends the life of your tires.
– Do not mount tires which have not been approved by KTM. Other tires
could have adverse effects on the way your motorcycle rides.
– Use tires of the same brand and type for the front and rear wheels.
– For your own safety replace damaged tires immediately.
– Worn tires can have a negative effect on how your motorcycle
performs, especially on wet surfaces.
– If air pressure is too low, abnormal wear and overheating of the tire
can result.
– New wheels have a smooth surface, which means that they must be run
in to achieve full grip. For this purpose, ride the motorcycle carefully at
moderate speed during the first 200 kilometers with new tires, tilting the
vehicle at different angles so that all sections are properly roughened. Tires
will not display their full grip characteristics until they are properly run
in.
– For reasons of safety, it is recommended to exchange the valve insert when-
ever 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 unbalanced
and before long other spokes will have come loose. Check spoke tension, espe-
cially 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 retight-
ened and the wheel centered by a KTM dealer.
– SPOKES CAN TEAR IF YOU CONTINUE TO RIDE WITH THEM LOOSE. THIS MAY
LEAD TO AN UNSTABLE HANDLING OF YOUR MOTORCYCLE.
– EXCESSIVELY TENSIONED SPOKES MAY RUPTURE DUE TO LOCAL OVERLOAD-
ING.THE SPOKES MUST BE TENSIONED TO 4 NM.

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 but-
ton, press the SET button to confirm and save the setting.
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