Antihopping Clutch; Adjusting The Antihopping Clutch - KTM 450 SMR Owner's Manual

16 TUNING THE ENGINE
16.6

Antihopping clutch

16.7

Adjusting the antihopping clutch

Info
The characteristics of the antihopping clutch can be affected by the spring preload force.
Increasing the spring preload force causes the clutch to open later when braking (more engine braking force). The clutch
also engages differently when starting; the differences are considerably less pronounced than when braking. The clutch then
behaves somewhat more aggressively.
The antihopping system reduces the force required to activate the clutch and improves
clutch handling; in addition, it increases riding stability by reducing slippage of the
rear wheel by means of engine braking action during downshifting.
L00160-11
The antihopping system uses a two-part inner clutch hub that is connected to a helical
gear.
The clutch spring preload can be adjusted if necessary.
Preload low, without
washer
A
Preload moderate, with
washer (condition at
B
delivery)
Washer (59032000101)
Preload high, with
washer
C
Washer (59032000102)
When the engine load is high (large engine torque), the turning action presses the two
parts of the inner clutch hub against each other, corresponding to the helical gearing,
thereby pressing the clutch facings against each other in addition to the clutch springs.
This additional press force means that the clutch springs require less preloading; as a
result, when downshifting, slippage arises briefly at the clutch and prevents rear wheel
hopping.
401550-10
Preparatory work
–
Rest the vehicle on the plug-in stand.
Main work
–
Remove screws
L00159-10
0 mm (0 in)
1.0 mm (0.039 in)
1.5 mm (0.059 in)
. Remove the outer clutch cover.
1
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