PISTON KIT 97mm B FORGED 2010-2013 YAMAHA YZF450 NAMURA FX-40046-B
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. 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. 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. 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. Manufacturer: Namura Technologies.
- SKU
- 56-W261.B.NT.F
- Brand
- Namura Technologies
- Availability
- In Stock (10)
FULL DESCRIPTION
This is a Namura forged piston kit, designed as a direct replacement for the fuel-injected 449cc engine. It is engineered to the original equipment manufacturer's 12.5:1 compression ratio and features a forged piston with a nominal bore size.
Key Features
- Forged aluminium construction offers enhanced strength and durability for demanding applications.
- The hard-anodised piston crown is designed to improve heat resistance and minimize carbon build-up, contributing to engine longevity.
- Features a MOS2 (molybdenum disulphide) skirt coating, which reduces friction and assists in the running-in process for smoother initial operation.
- Each piston dome is 100% CNC-machined to ensure a precise combustion shape, optimizing performance.
- This kit is supplied complete with the piston, a full set of piston rings, the necessary wrist pin, and circlips for a comprehensive replacement.
Specifications
- Piston Size: 96.96 mm (B size, nominal +0.01 mm)
- Nominal Bore: 97.00 mm
- Compression Ratio: 12.5:1
- Engine Configuration: 4-stroke single-cylinder
- Piston Ring Set Reference: NX-40046R
- Approximate Kit Weight: 0.599 kg


