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Also how much machining is needed to do away with the cush drive?



No cush up front, only in the rear wheel to take up the driveline shock. So really, match up the inner bearing diameters, fit a proper rotor and make a set of proper spacers and you're done.


A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)