



WISECO Forged Piston — Manufacturer part number W4921M07700B. Designed for motocross and engine preparations, this WISECO forged piston is aimed at riders who are replacing a worn part or looking for a robust base for their setup. Made from forged aluminum, it benefits from the brand's recognized expertise, a global reference for nearly 50 years.
This piston features a precise size: Ø 76.960 mm (oversize letter B), supplied with its ring kit. Its forged design ensures better mechanical strength under high stress compared to cast pistons, making it a relevant choice for intensive motocross use.
Compatibility (examples): SUZUKI RM‑Z 250 (2007, 2008, 2009). For safe installation, follow the manufacturer's recommendations regarding bore, piston/cylinder clearance, and break-in. If in doubt, entrust the installation to your tuner or qualified workshop.