KTM 250 EXC 2004 - Manual (Page 31)

ENGLISH
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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 622).
ƽ WARNING ƽ
N O 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
.
! CAUTION !
W HEN MOUNTING THE CHAIN JOINT , THE CLOSED SIDE OF THE SAFETY DEVICE MUST
POINT IN RUNNING DIRECTION .
Also check sprockets and chain guides for wear, and replace if necessary.
Chain wear
To check the chain wear, observe the following indications:
Shift the gear into idling and pull the upper chain strand with approx. 10-15
kilograms (33 lb) upwards (see figure). Now one can measure a space of 18
chain reels at the lower chain strand. The chain should be replaced at the
latest when a space of 272 mm (10.70 in) is measured. Chains do not
always wear off evenly, therefore repeat the measurement at different pla-
ces on the chain.
NOTE:
If you mount a new chain, the sprockets should also be replaced. New
chains wear faster if used on old used sprockets.
! CAUTION !
W HEN YOU ASSEMBLE A REAR SPROCKET WITH 14 T , THE COLLAR MUST BE ON THE INSIDE
S ECURE THE SCREWS OF THE CHAIN WHEEL BY APPLYING L OCTITE AND FASTEN THEM IN A
CROSSWISE ORDER .
T IGHTENING TORQUE FOR NUTS : 35 N M
T IGHTENING TORQUE FOR SCREWS : 50 N M
15 KG
33 lbs
max. 272 mm
1 2 3 16 17 18