Yamaha YZ 426 F (CJ 01) [2000-2002] - forged pistons

PROX forged pistons for Yamaha YZ 426 F

The PROX forged piston is designed as a replacement component for the Yamaha YZ 426 F (CJ 01) from the 2000 to 2002 model year range. Its forged aluminum design combines the specified design features of a 4T piston with standard compression and is therefore suitable for selection according to the specified engine data.

Technical features

• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 94.96 mm
• Letter oversize: B
• Oversize: +0.01
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Vehicle assignment

The forged piston fits the Yamaha YZ 426 F (CJ 01), built between 2000 and 2002. The assignment should be based on the complete model code, the year of manufacture and the specified piston dimensions.

Selection and structure

The diameter of 94.96 mm, the marking B and the oversize +0.01 are decisive for the selection of dimensions. The design as a hollow piston with 5 valve pockets describes the structural design of the piston and supports the clear assignment within the vehicle application mentioned. The ring design is specified as a set and complements the technical specification of the piston.