I recently bought a 2006 RM 125, the previous owner gave me the receipts for the new wiseco clutch that was installed. When the clutch is pulled in and I drop it into first gear it stalls. When I managed to get it into gear without stalling, it is really jerking forward with the clutch still mostly in. Could this be just a cable adjustment since it's a new clutch? If so how do I adjust it? Or stuck clutch plates?