PROX

Japan-made PROX piston kit designed as an OEM replacement for 125cc 2-stroke engines, built from high-silicon aluminum and CNC-machined for precise fit. Ideal for a reliable top-end refresh with all key parts in one kit.

• Bore size: 54.00 mm (standard oversize)
• Kit includes: piston, ring kit, wrist pin & circlips
• Material: high-silicon aluminum alloy (OEM spec or better)

Japan-made PROX piston kit engineered as an OEM replacement for 250cc 2-stroke engines. High-silicon aluminum alloy and precise CNC machining help restore compression and reliability.

• 66.40 mm bore (standard) / 66.35 mm piston size
• Includes piston, ring kit, wrist pin & circlips
• Moly-coated skirt for reduced friction and wear

Japan-made PROX piston kit built as a precise OEM replacement for 125cc 2-stroke engines. High-silicon aluminum alloy and CNC machining deliver tight tolerances and reliable performance.

• Standard bore: 54.00 mm (piston: 53.96 mm, Size A)
• Includes piston, ring set, wrist pin and circlips
• Cast high-silicon alloy meets or exceeds OEM specs

PROX Piston Kit is a Japan-made OEM replacement solution for restoring crisp compression and reliable performance on 85cc 2-stroke engines. Cast from a high-silicon aluminum alloy and CNC-machined to tight tolerances for a precise fit and long service life.

• Size: 48.45 mm piston (48.50 mm bore)
• Application: 85 cc, 2-stroke, standard compression/standard oversize
• Includes: piston, ring kit, wrist pin and circlips

PROX piston kit manufactured in Japan as an OEM-quality replacement for 85cc 2-stroke engines. High-silicon aluminum alloy and precision CNC machining deliver reliable performance and long service life.

• Bore: 48.50 mm (Standard) / piston size 48.46 mm
• Kit contents: piston, ring kit, wrist pin & circlips
• Material: high-silicon aluminum alloy (OEM-spec)

PROX Japan-made OEM-replacement piston kit for 2-stroke 85cc engines, built from high-silicon cast aluminum and CNC-machined to tight tolerances for reliable performance.

• Includes piston, ring set, wrist pin & circlips
• Piston size: 48.46 mm (Size B) / Bore size: 48.50 mm
• Standard compression, non-coated skirt