PROX offers you this original-type piston designed for 250cc BETA engines. With a diameter of 66 mm and a bi-segment 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 : 66.34 mm

B: 66.35 mm

C: 66.36 mm

Allow about 15 days for this type of piston.

Fits on:

BETA RR 250 2021 Oil mix

BETA RR 250 2021 Racing

BETA RR 250 2020 Oil mix

BETA RR 250 2020 Racing

BETA RR 250 2019 Racing

BETA RR 250 2019 Oil mix

BETA RR 250 2018

BETA RR 250 2018 Racing

BETA RR 250 2017

BETA RR 250 2017 Racing

BETA RR 250 2016

BETA RR 250 2016 Racing

BETA RR 250 2015

BETA RR 250 2015 Racing

BETA RR 250 2014

BETA RR 250 2014 Racing

BETA RR 250 2013

BETA XTRAINER 250 LC 2020 Oil mix EUROPE

BETA XTRAINER 250 LC 2019 Oil mix