Wouldn't the heavy solid rubber be part of the cush drive? My point was too many people have problems when the mix and match parts. If it was my bike I'd run 4 springs as above before I did anything else. Oh, and a well made clutch cover.The OEM cush drive is steel and very heavy. The OEM hub is not aluminum, but some sort of pot metal. In between the two are pieces of heavy solid rubber.
+1.FWIW stock clutch covers are only marginally better than carbon fiber from what I hear.
I had an open CF cover and got sideswiped by a VW Beetle - broke my battery and 4 posts off the clutch hub (plus a couple of broken toes).+1.
I lowsided my SS with a CF cover at 50 MPH or so, broke three posts, limped home.
A friend lowsided a 999 with OEM cover at 5 MPH or so, broke three posts, limped to a dealer somewhere in Italy who took the hub off another bike they had (not sure if customer's or not).
I now have slippers with better spring protection on all my Ducatis, and a hefty SpeedyMoto Arun on my 999R just to be sure.
I just low sided going 80mph and slid for 30 feet or so on the right side of the bike. Funny thing is; the clutch cover didn't even have a scratch on it. I have frame sliders and ya know what? No matter what clutch or cover you have, you'll still break something without the sliders to keep the bike from touching the ground to begin with.I lowsided my SS with a CF cover at 50 MPH or so, broke three posts, limped home.