WÖSSNER Piston Kit for BETA RR 250 2013-2025

WÖSSNER offers this piston kit for BETA RR 250 2013-2025. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.

Why replace the piston?

The benefits:

• Restore compression, power and easy starting.
• A piston of the right size keeps the intended clearance in the cylinder: less noise and less oil consumption.
• A new piston with rings, pin and clips: nothing to reuse from the old one.

Why choose WÖSSNER?

Wössner has forged its own pistons since 1994: Molykote-coated skirt to reduce friction and ease running-in, kit supplied complete with rings, pin and clips.

When should you replace the piston on your BETA RR 250?

Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.

No manufacturer hour figure for this model. Cross-Mania guideline: compression check every 20 h in hard use and every 40 h for leisure.

Specifications and fitting tips

• Manufacturer part numbers: 8310DA (A), 8310DB (B), 8310DC (C)

Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 66.34 mm, B = 66.35 mm, C = 66.36 mm.

Spare parts and items to plan

• Piston rings : PROX · VERTEX
• Top-end gasket kit : ATHENA · PROX
• Small end needle bearing : PROX · ATHENA
• Spark plug : NGK 3961 · NGK 3035
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
BETA RR 250 2025
BETA RR 250 2024
BETA RR 250 2023
BETA RR 250 2022
BETA RR 250 2021
BETA RR 250 2020
BETA RR 250 2019
BETA RR 250 2018
BETA RR 250 2017
BETA RR 250 2016
BETA RR 250 2015
BETA RR 250 2014
BETA RR 250 2013