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LOCK-UP CLUTCH
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I had come across a big problem once i had
started to make a lot of torque, this was the fact that the clutch could not cope with the
power that was now being transmitted through it, resulting in alot of slippage at aound
7500rpm.
Heavy duty clutch springs were installed and oil passages added to the inner and outer
clutch basket, just to try and get more oil flow through the plates, This was kind of a
success, but the pressure needed to pull the clutch lever was "beyond stupid",
and the clutch still slipped occasionally.
Enter Drag Racing technology - I work on alot of 300bhp+ drag bikes, they dont have clutch
problems and i'm only putting through half the Hp that they are transmitting through the
clutch.
Lock-up clutches work by centrifugal force, forcing the weighted arms against the clutch
assembly, this in turn applys pressure to the plates to stop them slipping.
Simple i'll machine one up! |
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Well maybe not quite so simple, biggest
promlem was the kick start shaft, as the clutch was now 50mm higher, the clutch cover had
to also be spaced out an extra 50mm, so an adaptor was made to fit on the end of the
shaft.
It took a couple of days to work everything out and machine it up, which i suppose wasn't
to bad.
The clutch springs are now rocker springs from a GSXR1100, which if you've ever felt them
you know that theres not much pressure needed compared to a clutch spring to compress
them.
The clutch is now as light as a feather, as 85% of the pressure is now applied by the
weighted arms.
No more sore wrists and fingers..........
Mark. |
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