
S3 cast piston specially designed for 125cc 2-stroke trial and enduro singles. Manufacturer reference PI-BE-TR125-A, this piston features a precise diameter of Ø 53.95 mm and standard compression.
This piston replaces the original on several 125 models and is aimed at riders looking for a wear part that meets manufacturer specifications. Its aluminum-silicon construction offers a good mass/resistance compromise, and the surface treatment reduces adhesion and wear on the skirt. The nitrided rings enhance durability inside the cylinder.
Main compatibilities: BETA EVO 125 2T (2023), OSSA TR125I (2015), BETA EVO 125 2T FACTORY (2020). Always check the dimensions and engine specifications before installation.