R&D offers an answer to either repairing or upgrading the O.E.M. superchargers vulnerable thrust bearing and main shaft bearing assemblies. Stock Class and Modified closed course and endurance competition engines with superchargers set up and running higher boost pressures and higher rpm frequencies will eventually need bearing servicing. When the main bearings in the supercharger wear over time, the shaft to bearing tolerance or clearances will become loose and the risk of friction burning or galling the thrust bearing assembly can occur. Servicing the supercharger main bearings periodically or upgrading to R&Ds new Duplex Bearing System will extend the life of the superchargers thrust bearing significantly. When supercharger thrust bearing failures have occurred in the past, there has not been a repair option due to no replacement parts manufactured. This has led the team of engineers at R&D to go to work to offer not only replacement parts that allow the superchargers to be repaired, but a group of parts that work together to offer improved thrust bearing clearances and oiling over stock. R&D offers both standard replacement bearing kits, and the new Duplex Bearing Kit that will work in any Yamaha supercharger. R&D also offers complete rebuild kits for stock superchargers running C1 Monster Wheel Kits and all supercharger wheel kits using the stock exducer size. R&D also offers rebuild kits for all C3, C5, C7 Monster Wheel Kits with larger exducers. Keep your supercharger serviced periodically or upgraded with High Performance Race parts only available from R&D. 612-25025 OEM Replacement Bearing Kit (stock/limited class legal), 612-25026 Upgraded Supercharger Duplex Bearing Kit, 612-25028 Supercharger Rebuild Kit with OEM Exducer/Thrust Bearing Assembly Kit, 612-25030 Supercharger Rebuild Kit with C3/C5 Exducer/Thrust Bearing Assembly Kit
...