
PROX Cast Piston (manufacturer reference 01.3224.A) — Replacement piston designed for motocross machines. Made from aluminum, this cast piston features a flat crown and a Mos2 treated skirt to enhance sliding in the cylinder and reduce contact wear. It is an oversize part "A" (Ø 53.95 mm) intended for standard compression installation.
This piston is aimed at riders and workshops looking for a replacement part for the top-end on compatible 125 cc motocross bikes. It is suitable for the indicated oversize tolerances and can be installed in place of the original piston intended 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.