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

PROX forged pistons for Yamaha YZ 450 F (CJ 03) from 2003

The PROX forged piston is tailored to the Yamaha YZ 450 F (CJ 03), built in 2003. Its special alloy is designed to minimize friction and thus support reliable function in the engine. The piston is made of aluminum and has a forged design.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 94.95 mm
• Letter oversize: A
• Oversize: STD
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Matching vehicle assignment

The forged piston is intended for the Yamaha YZ 450 F (CJ 03) of the entire 2003 model year range. When making the selection, the vehicle model, the year of manufacture, the diameter of 94.95 mm and the markings “A” and “STD” must be taken into account in particular.

Version for engine use

The forged aluminum construction combines the PROX-specific alloy with a standard compression. The design as a hollow piston with 5 valve pockets describes the piston shape and supports the clear technical classification. With the indication “4T”, the piston is assigned to the corresponding four-stroke engine concept.