Prox Forged Piston Piston kitRef : PRO00570A / 1093381001

The PROX 01.2448.A forged piston is designed for motocross riders seeking a robust and precise replacement during an engine rebuild. Machined from a specific aluminum alloy, it offers a finish tailored to bore tolerances and aims to minimize friction to maintain reliability under intensive use. Designed to retain original characteristics, this piston is intended for 450 cc engines requiring an oversize A.

• Diameter: Ø 96.950 mm (Ø96.95 mm)
• Compression: standard
• Material: forged aluminum
• Supply: piston ring kit included
• Usage: equivalent to original equipment rebuild
• Manufacturer reference: 01.2448.A

This forged piston is particularly suitable for high-displacement and high-rev configurations typical of motocross. It is installed during an oversize A re-boring and fits into restorations where a geometry faithful to the original is expected: bore, piston clearance, and sealing via the provided rings. Check compatibility with your machine before ordering.

Main compatibilities (examples): YAMAHA WR 450 F (RE45) 2020, YAMAHA YZ 450 F (CJ23) 2019, YAMAHA YZ 450 F (CJ22) 2018.