I just traded my ktm duke2 for a sweet GSXR1000. The suzuki runs awesome except for the clutch engagement. On a gentle, legal speed take off there is no problem. On an aggressive, clutch slipping launch, the engagement is grabby and inconsistant. The clutch will grab and slip in a jerking, lurching fashon with a chirp/whine sound when it grabs. Under hard acceleration and smooth clutch lever release it is impossible to get a smooth engagement. It was suggested to me that this may be caused by worn shudder springs. The rest of the clutch assembly has been replaced. The basket has slight notching but not excessive (my supermotos have been notched worse and still engaged smoothly). Due to my offroad/supermoto background i have no hands on experience with shudder springs or clutch cushion bands. Any insight is appreciated.