my clutch(i think) makes a sound and vibration when trying to launch from a standstill @ 4000 rpm +. It sounds like bad brakes on a bicycle. the bike is new to me with 2000 miles , the clutch does not slip accept for this unusual noise when taking off quickly. I´ve ridden a friends 06 gsxr 1000 and his is fine. He said his 01 gsxr 1000 had the same issue when he put systhetic oil at 250 miles...so I have changed the oil but the problem is still there..looking for an answer.?