PROX offers you this original-type piston designed for Yamaha 250cc engines. With a 77 mm diameter and a ring design, it offers a good balance between performance, torque and reliability.

Superior quality, it perfectly replaces the original piston without modification. Its design allows a slight increase in compression ratio, which improves engine torque, especially at low and mid-range speeds.

This model features two lubrication points to optimize lubrication and ensure longer cylinder and piston life. The skirt has also been reworked to promote gas flow and improve overall engine efficiency.

This piston is therefore ideal for optimizing the top end of the engine while maintaining excellent reliability.

Available sizes:

A: 76.95 mm

B: 76.96 mm

C: 76.97 mm

Allow about 15 days for this type of piston.

Fits on:

FANTIC XEF 250 2024

FANTIC XEF 250 2023

FANTIC XEF 250 2022

FANTIC XXF 250 2024

FANTIC XXF 250 2023

FANTIC XXF 250 2022

YAMAHA YZ 250 FX 2023

YAMAHA YZ 250 FX 2022

YAMAHA YZ 250 FX 2021

YAMAHA YZ 250 FX 2020

YAMAHA YZ 250 FX 2019

YAMAHA YZ 250 F (CG40) 2021

YAMAHA YZ 250 F (CG40) 2020

YAMAHA YZ 250 F (CG40) 2019

YAMAHA WR 250 F 2023

YAMAHA WR 250 F 2022

YAMAHA WR 250 F 2020

YAMAHA YZ 250 F 2024

YAMAHA YZ 250 F 2023

YAMAHA YZ 250 F 2022

YAMAHA YZ 250 F 2026

YAMAHA YZ 250 F 2025

YAMAHA WR 250 F 2024

YAMAHA WR 250 F 2021

YAMAHA YZ 250 FX 2024