ENGLISH
21
MAINTENANCE WORK ON CHASSIS AND ENGINE
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Checking chain tension
To check chain tension, turn off the engine and shift into neutral. Chain
tension is correct when the chain can just barely be pushed up to touch the
swingarm at the level of the screw
[1]
(see illustration). If necessary, correct
chain tension.
– IF CHAIN TENSION IS TOO GREAT, PARTS WITHIN THE SECONDARY POWER
TRANSMISSION (CHAIN, CHAIN SPROCKETS, TRANSMISSION AND REAR WHEEL
BEARINGS) WILL BE SUBJECTED TO UNNECESSARY STRESS, RESULTING IN
PREMATURE WEAR AND EVEN CHAIN BREAKAGE.
– TOO MUCH SLACK IN THE CHAIN, ON THE OTHER HAND, CAN RESULT IN THE
CHAIN JUMPING OFF THE CHAIN WHEELS. IF THIS HAPPENS, THE CHAIN COULD
ALSO BLOCK THE REAR WHEEL OR DAMAGE THE ENGINE.
– IN EITHER CASE THE OPERATOR IS LIKELY TO LOSE CONTROL OF THE MOTOR-
CYCLE.
Correcting chain tension
Loosen hexagon nuts
[2]
on the left and right swingarm fists.
Loosen allan head screw
[3]
.
Insert the hexagon socket wrench that comes with the tool set into the hexa-
gon socket of the eccentric and rotate the eccentric upwards (i.e. the wheel
spindle must move upwards).
IF THE WHEEL SPINDLE BECOMES LOOSENED DURING THE PROCESS, RETURN
ECCENTRICS TO THEIR ORIGINAL POSITION BEFORE RETIGHTENING THE WHEEL
SPINDEL (SEE MAINTAINING ECCENTRICS)
Tighten hexagon nuts on swing arm fists to 40 Nm (30 ft.lb).
Tighten allan head screw
[3]
to 40 Nm (30 ft.lb).
– DO NOT ROTATE THE ECCENTRIC DOWNWARDS (I.E. THE WHEEL SPINDLE MOVES
DOWNWARDS). THIS WILL RAISE THE TAIL OF THE MOTORCYCLE AND WORSEN
THE MOTORCYCLE’S PERFORMANCE ON THE STRAIGHTAWAY.
– IF YOU DON’T HAPPEN TO HAVE A TORQUE WRENCH AT HAND, MAKE SURE
YOU HAVE THE TIGHTENING TORQUE CORRECTED BY A KTM DEALER AS SOON
AS POSSIBLE.
1
2
3
Chain maintenance
For long chain life, good maintenance is very important. X-ring chains require
only modest maintenance. The best way is to use lots of water, but never use
brushes or solvents. After letting the chain dry, you can use a special X-ring
chain spray (Motorex Chainlube Racing).
– NO LUBRICATION IS ALLOWED TO REACH THE REAR TIRE OR THE BRAKE DISK,
EITHERWISE THE ROAD ADHERENCE AND THE REAR WHEEL BRAKING EFFECTS
WOULD BE STRONGLY REDUCED AND THE MOTORCYCLE COULD EASILY GET
OUT OF CONTROL.
– THE CHAIN DOES NOT HAVE A CHAIN JOINT FOR SAFETY REASONS. ALWAYS
HAVE THE CHAIN REPLACED IN AN AUTHORIZED KTM WORKSHOP WHERE THE
SERVICE TECHNICANS HAVE THE REQUIRED ORIGINAL RIVETING TOOL.
– NEVER MOUNT A NORMAL CHAIN JOINT.
Also check sprockets and chain guides for wear, and replace if necessary.
