Pilot Driven Clutch by hoser..I took my driven clutch apart for inspection and noticed their was a tight fit between the plastic bushing and the spring so tight in fact you need to use a screwdriver to pry the spring off the plastic bushing, since my Pilot is in need of a faster up shift and modification parts for the driven do not exist their is not much you can do to tune the driven assembly, changing the driven is possible I am told that Dan Roberto makes a new input shaft that will allow you to use different driven clutches but finding the proper length belt is questionable at best. You can see the plastic bushing is still stuck in the spring, as the clutch up shifts and the spring collapses the spring has to over come the friction of the plastic bushing allowing the clutch to stay in low gear longer. The Pilot driven does not use a helix or external cam like the 250 or 350, Honda got smart when they built this clutch they made everything sealed like the drive clutch, good for keeping the moving parts protected and well lubricated but tough for guys wanting more performance out of their machines, how do you change the angle of that cam? Expensive question you certainly do not buy a 80.00 helix and stronger spring... For a faster up shift I am trying to reduce the friction of the plastic spacer and the spring tension at the same time by using a cheap 3 finger hone and a lathe I reduced the springs inside diameter enough where the plastic spacer would slide into the spring with just a little resistance and not a real tight press fit. Look close and you can see the flat spot created on the inside of the spring, machining the plastic bushing is out of the question the material is so soft that it really does not machine or sand well I was able to smooth out the outer surface that was slightly scared by the spring using 320 wet/dry sand paper and water (wet sanding in the lathe) Hopefully by removing material from the driven spring it will allow my Pilot to upshift faster and control some of the violent wheel spin I have, reducing the spring wire diameter by the hone process I hope will reduce the springs tension and allow the driven to upshift faster. More later after the modification has been tested. Update started testing today!