Prox Forged Piston kitRef : PRO00293A / 1095558002

PROX Forged Piston (ref. 01.2414.B) — Designed for the motocross world, this forged aluminum piston meets the demands of discerning riders looking for a good balance between performance and reliability. Machined from a specific alloy and produced using a process widely employed by manufacturers, it is suitable for an equivalent replacement to the original.

• Diameter: Ø 76.96 mm (oversize B)
• Compression: standard 13.5:1
• Material: forged aluminum
• Patented surface treatment to reduce friction in the cylinder
• Delivered in a ring kit

Ideal for the top end of 250cc 4-stroke motocross engines, this piston aims for a crisp throttle response and increased longevity thanks to its forged construction. The surface treatment minimizes wear and friction losses at the wall/piston ring contact, facilitating break-in and stability of the piston-cylinder clearance on demanding tracks. Particularly suitable for off-road use where reliability and consistency in engine behavior are paramount.

Main compatibilities: YAMAHA WR 250 F (RE25 2017, CG36 2015) and YAMAHA YZ 250 F (CG34 2015). Always check the reference and bore dimensions before installation.