A thread I found very interesting:
http://www.riderforums.com/showthread.php?t=41906
Might consider getting some made as I'm about to replace my rubber ones...
Solid Bar Riser Bushes - Anyone used them?
Solid Bar Riser Bushes - Anyone used them?
Muzzy Ti 4 into 1, Power Commander III USB, K&N, Airbox mod, KLEEN delete, Throttle quickener, Vortex -1 front sprocket, Renthal Ultra Low 'bars, Seat cowl, Ohlins 0.95kg fork springs, ZX6R shock. 130hp/ 70ft/lbs!