Chain Maintenance; Chain Wear - KTM 250 SX 2003 Owner's Handbook Manual

22
15 KG
33 lbs
max. 272 mm
1 2 3

Chain maintenance

For long chain life, good maintenance is very important. X-ring chains requi-
re 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 (Shell Advance Bio Chain).
N
O LUBRICATION IS ALLOWED TO REACH THE REAR TIRE OR THE BRAKE DISK
THE ROAD ADHERENCE AND THE REAR WHEEL BRAKING EFFECTS WOULD BE STRONGLY
REDUCED AND THE MOTORCYCLE COULD EASILY GET OUT OF CONTROL
W
HEN MOUNTING THE CHAIN JOINT
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 places 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.
W
HEN YOU ASSEMBLE A REAR SPROCKET WITH
S
ECURE THE SCREWS OF THE CHAIN WHEEL BY APPLYING
CROSSWISE ORDER
T
IGHTENING TORQUE FOR NUTS
T
IGHTENING TORQUE FOR SCREWS
16 17 18
WARNING
! CAUTION
,
THE CLOSED SIDE OF THE SAFETY DEVICE MUST
.
CAUTION
!
14
.
: 35 N
M
: 50 N
M
,
EITHERWISE
.
!
!
,
T THE COLLAR MUST BE ON THE INSIDE
L
OCTITE AND FASTEN THEM IN A