PROX

Japan-made PROX piston kit designed as an OEM replacement for 300cc 2-stroke engines. High-silicon aluminum alloy and CNC machining deliver reliable fit and consistent performance.

• 72.00 mm bore (standard), piston size 71.94 mm
• Includes piston, ring kit, wrist pin & circlips
• Standard compression ratio, non-coated skirt

PROX Piston Kit made in Japan for OEM-style performance and reliability in 300cc 2-stroke engines. High-silicon aluminum alloy and precise CNC machining ensure excellent fit and long service life.

• 72.00 mm bore / 71.95 mm piston (Standard, Size B)
• Includes piston, ring kit, wrist pin & circlips
• Cast high-silicon aluminum alloy, CNC-machined to tight tolerances

Refresh your 300cc 2-stroke top end with this Japan-made PROX OEM-replacement piston kit, cast from high-silicon aluminum and CNC-machined to tight tolerances for reliable fit and performance.

• 72.00 mm bore (standard), Standard Size C piston (71.96 mm)
• Complete kit: piston, ring set, wrist pin & circlips
• High-silicon aluminum alloy meets/exceeds OEM specs

Refresh your 250cc 2-stroke top end with this PROX OEM-replacement piston kit, made in Japan for reliable fit and performance. High-silicon cast aluminum is CNC-machined to tight tolerances and finished with a moly-coated skirt for reduced friction.

• 66.40 mm bore (standard), Standard Size A
• Includes piston, ring set, wrist pin & circlips
• High-silicon aluminum alloy; OEM-spec precision

PROX Piston Kit manufactured in Japan as a high-quality OEM replacement for reliable performance and long service life. Cast from high-silicon aluminum alloy and CNC-machined to extremely close tolerances for consistent fit.

• 66.35 mm bore/piston diameter (Standard Size B)
• High-silicon aluminum alloy construction
• Includes piston, ring kit, wrist pin & circlips

PROX Japan-made piston kit engineered as an OEM replacement for 250cc 2-stroke engines. High-silicon aluminum alloy and CNC machining deliver tight tolerances and reliable performance.

• 66.40 mm bore / 66.36 mm piston size (Standard Size C)
• Moly-coated skirt for reduced friction and wear
• Kit includes piston, ring set, wrist pin & circlips