dave quite honestly the std clutch with an extra plate in it and 916 type srpings is the way to go unless you put a full slipper in it. the aptc is a bit soft on launch and doesnt grip well and can lose you time at the start. when we had to swap bikes last year between races after a big crash in race 1, clint went from 1st row to 13th at redgate purely down to the launch of the aptc clutch on the 2nd bike |