Yamaha YZ 450 F (CJ 03) [2003] - forged pistons

PROX forged pistons for Yamaha YZ 450 F, built in 2003

The PROX forged piston is designed for the Yamaha YZ 450 F from 2003. Its special aluminum alloy is designed to minimize friction and thus support reliable function in the engine.

Execution and function

The piston is forged and has a hollow piston design with 5 valve pockets. The standard piston compression allows a clear assignment within the specified version. The version is intended for a 4T engine.

Technical data

• Brand: PROX
• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 94.97 mm
• Letter oversize: C
• Oversize: +0.02
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Vehicle assignment

Suitable for the Yamaha YZ 450 F in the entire 2003 model year range.

Factual note

Before ordering, please compare the piston dimensions, the oversize letter C and the design with the existing engine. The specified diameter is 94.97 mm, the oversize version is +0.02.