In the thread entitled, Nighthawk wheels on 75 CB750F Member 754 mentioned the fact that most shaft drive wheels have a drive collar that you can unbolt from the wheel, and replace with a custom fabricated sprocket carrier, which can be one solid piece, without a cush drive, with no worry for cracking the wheel. I'd read somewhere on a chopper forum that people were using shafty wheels with a chain, but never knew how until then.