Yamaha WR 450 F (RE 45) [2018-2019] - forged pistons

PROX forged pistons for the Yamaha WR 450 F

The PROX forged piston is designed for the Yamaha WR 450 F (RE 45) built in 2018-2019. It is suitable as a replacement with equivalent original equipment quality and combines a forged design with a defined standard size.

Function and execution

The piston is made of aluminum and is manufactured as a forged piston. A patented surface treatment helps reduce friction in the cylinder. The piston shape features a flat crown with a raised top and 4 valve pockets.

Technical data

• Piston diameter: Ø 96.95 mm
• Piston type: forged
• Material: aluminum
• Piston compression: standard
• Standard compression: 12.5:1
• Oversize letter: A
• Oversize: STD
• Piston rings: set
• Version: 4T
• Piston head: flat crown with raised top and 4 valve pockets

Vehicle assignment

Suitable for the Yamaha WR 450 F (RE 45), built between 2018 and 2019. The assignment refers to this vehicle model and the complete year range mentioned.

Selection note

The Ø of 96.95 mm, the standard compression of 12.5:1 as well as the A and STD markings make it easier to select the intended piston design. Before ordering, these technical values ​​should be compared with the existing engine structure.