Yamaha FX-SHO/FZR/FZS R&D Ultimate Billet Supercharger Shaft Kit
ALL Yamaha FZR/FZS/FX-SHO Models
R&D # 612-25020
R&D's new High Performance Billet Supercharger Shaft eliminates the weak design features of the OEM and aftermarket HKS supercharger shafts. After analyzing the OEM HKS shaft design and sorting through the various failures we experienced with it while testing our popular Monster S/C Wheels, we developed a superior shaft design.
The new R&D shaft is not a copy of the fragile HKS design. Rather, it is a completely new design, superior in material strength and improved in every way.
The new R&D Shaft is precision CNC machined, heat treated, and precision ground from billet steel alloy. Featuring a uni-structure design that incorporates the shaft and gear as one billet piece, much like a transmission shaft. This eliminates the fracture point on the OEM design where the pressed on gear shears off the end of the shaft. The new one piece design will also eliminate gear slippage under high boost loads and increased heat.
Next, we increased the inadequate 6mm thread diameter on the OEM shaft to utilize a larger well proven “Turbo spec”. The added strength of the new 5/16-24 left handed shaft thread will not fatigue or break under extreme conditions. The larger thread diameter will also allow wheel torque specs to be increased safely.
The undercut or “fracture point” where the shaft meets the shoulder on the OEM design was also eliminated. Replaced with a strong fillet radius and mating Thrust Plate. The new kit supplied Thrust Plate features a matching shaft fillet radius and is designed to eliminate potential metal galling with higher boost.
Lastly, the Ultimate Shaft is 17% lighter than all other shafts on the market. The reduced reciprocating will extend supercharger clutch life. The R&D Ultimate Supercharger shaft design is the lightest and strongest on the market.
Used by Factory Yamaha Race Teams. Kit comes complete with Billet Shaft, new Thrust Plate Washer, larger nut and installation instructions. All in all, the new R&D Ultimate Billet Shaft is not just a replacement shaft, but a solution to end all supercharger shaft problems.
R&D also offers a bearing rebuild kit to replace worn supercharger bearings Pt. # 612-25025.