
VERTEX cast piston designed for engine rebuilds of motocross machines. Made from aluminum, this piston Ø 66.340 mm (oversize letter A) corresponds to a specific bore size for the listed RM250 models and maintains the original standard compression. This part is intended for piston replacement and refurbishment after wear or repair, offering a suitable fit for cylinders machined to the indicated oversize.
Ideal for preparations and refurbishments on off-road circuits, this piston is aimed at riders and mechanics looking for a replacement part that meets machining specifications. Before ordering, check the cylinder bore and the ring gap to ensure compatibility with oversize A. The use of rings and proper installation (honing, axial play check) remains essential to guarantee correct operation of the piston/cylinder assembly.
Main compatibility: