Yamaha WR 400 F (CH 04) [1999-2000] - forged pistons

PROX forged pistons for Yamaha WR 400 F (CH 04) 1999-2000

The PROX forged piston is designed for the Yamaha WR 400 F (CH 04) from the entire 1999-2000 model year range. As a forged aluminum piston version, it is suitable for replacing the corresponding piston within this vehicle classification.

Design and technical features

• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 91.96 mm
• Letter oversize: B
• Oversize: +0.01
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

The combination of the diameter Ø 91.96 mm, the oversize letter B and the oversize +0.01 specification supports targeted selection based on the existing motor version. The standard piston compression and the design as a hollow piston with 5 valve pockets are decisive for the technical classification of the component.

Vehicle assignment

Suitable for Yamaha WR 400 F (CH 04), built between 1999 and 2000. The assignment refers to this complete year range and the model mentioned.

Technical note

For the selection, the piston diameter Ø 91.96 mm, the oversize letter B and the oversize specification +0.01 must be compared in particular. The piston is specified as a 4T version.