Dahomie, if you are still having problems with the slipper clutch i now have our slipper upgrade kit available for the S4 / BJ4WE. Which we think cures the problem with the slipper clutch coming undone and also always you to run the slipper looser which in turn puts less stress on the rear gearbox.
Myself and Chris D having been running this mod since the Oswestry national without any problems.
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Jonathan | Atomic-Carbon
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