A forged piston kit in “B” size engineered to the OEM 12.5:1 compression ratio, featuring a 96.96 mm forged piston for a nominal 97.00 mm bore. Supplied complete with piston, ring set, wrist pin and circlips, it provides a direct replacement solution for the fuel-injected 449 cm³ engine of this period.

Features

• Forged aluminium construction for strength and durability


• Hard-anodised crown to improve heat resistance and reduce carbon build-up


• MOS2 (molybdenum disulphide) skirt coating to reduce friction and assist running-in


• 100% CNC-machined piston dome for precise combustion shape


• Supplied with piston, rings, wrist pin and circlips

Specifications

• Piston size: 96.96 mm (B size, +0.01 mm)


• Nominal bore: 97.00 mm


• Compression ratio: 12.5:1


• Configuration: 4-stroke single-cylinder


• Piston ring set: NX-40046R (reference)


• Approximate kit weight: 0.599 kg

Cross-Reference OEM Part Numbers

• 33D-116A0-00-00


• 33D-11631-00-00


• 33D-11603-00-00


• 33D-11633-00-00


• 93450-19052-00

Vehicle Fitments

• 
  

  Yamaha YZ450F 2010–2013