Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Intresting, it seems viton would be the way to go, but to soft to be machined. I think these teflon ones will act more like the acetal ones ttr made, not much give, but might hold up better.
The CB400F appears to have 3 cush drives, clutch, primary gear and rear hub. Does making one with less give in it have any disadvantages? Replacing the dual mass flywheel on a car with a solid one often works but I have also heard of increased vibration and even crankshaft failure. Be interesting to see the outcome of the Teflon ones as I think mine need replacing.