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KTM 400 SX - Page 20

KTM 400 SX
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ENGLISH
18
Checking chain tension
For checking, put the motorcycle on its main stand or jack it up on its frame so
that the rear wheel is relieved of any load.
Push the chain upwards appr. 30 mm (1,2 in) from the end of the chain sliding
component until the upper part of the chain is tensioned (see illustr.)
Now, the distance
A between chain and swingarm should be 0 mm respec-
tively 5 mm (0,2 in) (depending on final drive ratio). The upper part of the
chain
B must be tight (see illustr.).
Correct chain tension, if necessary!
WARNING
–I
F CHAIN TENSION IS TOO GREAT
,
PARTS WITHIN THE SECONDARY TRANSMISSION
(
CHAIN
,
SPROCKETS
,
DRIVE ASSEMBLY AND REAR WHEEL BEARINGS
)
WILL BE SUBJECTED TO UNNECES
-
SARY STRESS
,
RESULTING IN PREMATURE WEAR AND EVEN CHAIN BREAKAGE
.
–TOO MUCH SLACK IN THE CHAIN
, ON THE OTHER HAND, CAN RESULT IN THE CHAIN JUM-
PING OFF THE SPROCKETS. IF THIS HAPPENS
, THE CHAIN COULD ALSO BLOCK THE REAR
WHEEL OR DAMAGE THE ENGINE
.
–I
N EITHER CASE THE OPERATOR IS LIKELY TO LOSE CONTROL OF THE MOTORCYCLE
.
Correct chain tension
Loosen collar nut
1
, loosen lock nuts
2
, and turn right and left adjusting screws
3
equally far. Tighten lock nuts
2
.
Before tightening the collar nut, 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 fcollar nut
1
with 80 Nm (59 ft.lb).
Chain maintenance
For long chain life, good maintenance is very important. Chains without O-rings
should be cleaned in fireproof solvent regularly and afterwards treated with hot
grease or chain spray (Shell Advance Bio Chain).
O-ring chains on the other hand are very simple to clean. The best way is to use
lots of water, but never use brushes or cleaning liquids. After letting the chain dry,
you can use a special O-ring chain spray (Shell Advance Bio Chain).
WARNING
NO LUBRICATION IS ALLOWED TO REACH THE REAR TYRE OR THE BRAKE DISKS, EITHERWISE
THE ROAD ADHERENCE AND THE REAR WHEEL BRAKING EFFECTS WOULD BE STRONGLY REDU
-
CED AND THE MOTORCYCLE COULD EASILY LOSE CONTROL.
!
CAUTION
!
W
HEN MOUNTING THE CHAIN MASTERLINK CLIP, THE CLOSED SIDE OF THE MASTERLINK CLIP
MUST POINT IN RUNNING DIRECTION
.
Also check sprockets and chain guides for wear, and replace if necessary.
A
B
15:40
15:45
A = 0mm
16:40
16:45
14:50
A = 5mm
15:50
30mm
1
2
3
4
4

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