These "CrankStuffers" are machined from Nylon to replace the melted and overheated stock units. Yamaha does not sell these parts individually. In order to get these parts from Yamaha, you must buy the entire crank assembly! You can rebuild the old crank using a high performance connecting rod and these "CrankStuffers" and save almost $90 over the factory crank assembly.
Pro Moto Billet is the only company who offers the replacement crank stuffers.
