
Replace your original piston with a replacement component designed for the motocross world: the WISECO forged piston, reference W643M04900. Made from forged aluminum, it features oversized machining dimensions indicated for setups requiring a different bore. Its finish and design make it suitable for the listed 80 cc engines and for maintenance or cylinder refurbishment interventions.
This piston is aimed at riders and mechanics looking for a replacement part that conforms to the +2.00 bore dimensions. Check the piston/ring clearance and manufacturer recommendations during installation, as well as the condition of the cylinder and rings. Compatible with several variants of HONDA CR 80 R (e.g., STD WHEELS 14/17, BIG WHEELS 16/19 and 18/21 depending on the year), this piston integrates into engine renovation operations on trails and motocross bikes equipped for this size.