KTM ENDURO SUPERMOTO 640 LC4 - Manual (Page 25)

ENGLISH
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MAINTENANCE WORK ON CHASSIS AND ENGINE
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Checking chain tension
To check, jack up the motorcycle on the center stand or frame until it no longer
touches the ground.
Press the chain up approx. 30 mm behind the end of the chain sliding com-
ponent. The chain should barely touch the swing arm when the upper chain
part [A] is tensioned. If not, correct the 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.
Correct chain tension
Loosen collar nut [1], loosen counter nuts [2], and turn right and left adjust-
ing screws [3] equally far. Tighten counter nuts [2].
Before tightening the wheel spindle, verify that the chain adjusters [4] are
sitting close to the adjusting screws and that the rear wheel has been
aligned with the front wheel.
Tighten collar nut [1] with 80 Nm.
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 POS-
SIBLE. A LOOSE AXLE MAY LEAD TO AN UNSTABLE DRIVING BEHAVIOR OF YOUR
MOTORCYCLE.
NOTE: The large adjusting range of the chain adjusters 32mm (1.28 in) allows
you to use different secondary ratios in combination with the same chain length.
The chain adjusters [4] can be rotated by 180°.
ALWAYS MOUNT THE CHAIN TENSIONER EQUALLY ALIGNED.
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4
A