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.
- Brand: PROX
- Type: cast piston
- Diameter: Ø 53.950 mm (oversize letter A)
- Compression: standard
- Material: aluminium
- Specificity: flat crown / Mos2 treated skirt
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.
