Delrin is used in performance upgrades for bushings in suspension parts. It is used on sway bars, A-arms,and other suspension parts. It's harder than rubber and Poly Graphite but still has some "give" but not much. The "Shore scale" is what's used to rate their hardness.
The "cush drive" is short for "cushion drive" and is there for a reason. With NO cushioning in the drive train to take up any "Snatch" effect you'll cause excessive wear on Transmission bearings, chain, gears, wheel bearings, swing arm bushes and on your self too. It would feel like being on a Carnival ride that starts and stops abruptly. With the power transmission coming on very abruptly it could be dangerous when applying throttle coming out of a corner.
It's there for a reason and to start second guessing what has been done by design engineers i personally feel would be detrimental to the handling of the bike.
