
PROX Cast Piston (manufacturer ref. 01.3224.A) — Replacement piston designed for motocross machines. Made from aluminium, this cast piston features a flat crown and a Mos2 treated skirt to enhance sliding in the cylinder and reduce wear. It is an oversize part "A" (Ø 53.95 mm) intended for standard compression fitting.
This piston is aimed at riders and workshops looking for a replacement part for high-performance engines on compatible 125 cm3 motocross bikes. It is suitable for the indicated oversize tolerances and fits in place of the original piston designed for A. For a complete replacement, consider the associated wear items: rings (ref. 260231), pin (032028), clips (CP1510), needle cage (400413), and top-end gasket set (603143).
Top known applications: SUZUKI RM 125 (2006, 2007, 2008). Always check the reference and dimensions before installation to ensure compatibility with your cylinder and piston-sleeve clearance.