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MAINTENANCE WORK ON CHASSIS AND ENGINE
TIRES – AIR PRESSURE
front
SM Racing
1,5 bar
Road, driver only 2,0 bar
Road, with passenger 2,2 bar
32
max. 5 mm
Tires, air pressure
Tire type, tire condition, and air pressure level affect the way your motorcy-
cle rides, and they must therefore be checked whenever you are getting ready
to go anywhere on your motorcycle.
Tire size can be found in the technical specifications and in their homologa-
tion certificate
Tire condition has to be checked every time you want to ride your motorcycle.
Before leaving, check tires for punctures and nails or other sharp objects that
might have become embedded in them.
Refer to the specific regulations in your country for minimum tire tread require-
ments. We recommend you replace the tires at the latest when the tread is
down to 2 mm.
Tire pressure should be checked regularly on a "cold" tire. Proper pressure
ensures optimum driving comfort and extends the life of your tires.
– DO NOT MOUNT TIRES WHICH HAVE NOT BEEN APPROVED BY KTM. OTHER TIRES
rear
COULD HAVE ADVERSE EFFECTS ON THE WAY YOUR MOTORCYCLE BEHAVES.
– FRONT AND REAR WHEELS MAY ONLY BE FITTED WITH TIRES HAVING THE
1,6 bar
SAME TREAD LAYOUT. USE HOMOLOGATED TIRES.
– FOR YOUR OWN SAFETY REPLACE DAMAGED TIRES IMMEDIATELY.
2,2 bar
– WORN TIRES CAN HAVE A NEGATIVE EFFECT ON HOW YOUR MOTORCYCLE
2,4 bar
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 MOTOR-
CYCLE CAREFULLY AT MODERATE SPEED DURING THE FIRST 200 KILOMETERS
(125 MILES) 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.
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 screwdriver (see photo). A clear tone must be the
result. Dull tones are indicators of loose spokes. If necessary, have the spokes
retightened 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 5 NM ± 1NM.
1
Checking the shock absorption rubbers in the rear hub *
LC4 models have a damped rear wheel hub. For this purpose, the engine power
is conveyed from the rear sprocket via 6 shock absorption rubbers [1] to the
rear wheel. These 6 absorption rubbers wear with increasing operation time,
and should be checked for wear whenever the rear wheel is dismounted.
For this purpose, lie the rear wheel on a work bench with the rear sprocket
upwards, and put the wheel spindle in the hub. Now hold the rear wheel firmly
and try to turn the rear sprocket. The rear sprocket may not turn more than
maximum 5 mm (0,2 in) measured on the outside. If the play in the chain
wheel is larger, all 6 shock absorption rubbers are to be replaced.
Check the shock absorption rubbers for signs of damage and dirt.
IF THE SHOCK ABSORPTION RUBBERS ARE NOT REPLACED IN GOOD TIME, THE
REAR SPROCKET CARRIER AND THE REAR HUB WILL BE DAMAGED. ALLWAYS
REPLACE ALL 6 ABSORPTION RUBBERS, NEVER SINGLE RUBBERS.
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