Prox Forged Piston kitRef : PRO00292A / 1095558001

PROX Forged Piston (ref. 01.2414.A) – Designed for the motocross world, this forged aluminum piston uses an alloy and process similar to those employed by most manufacturers. It offers a balance between strength and performance, suitable for demanding off-road applications.

• Diameter: Ø 76.95 mm (oversize letter A)
• Compression: standard 13.5:1
• Material: forged aluminum
• Treatment: patented surface treatment to reduce friction in the cylinder
• Delivered in: kit (rings included)

The PROX piston is intended as an equivalent replacement for original parts on 250cc 4-stroke motocross engines. The surface treatment helps limit piston/cylinder friction and optimizes machining finish, without promising unverified gains. Installation and break-in should be performed according to manufacturer recommendations to ensure longevity and engine performance.

Compatible with: YAMAHA WR 250 F (RE25 2017, CG36 2015) and YAMAHA YZ 250 F (CG34 2015). Manufacturer reference: 01.2414.A. Suitable for setups where a reliable and robust forged part is sought to tackle the track.