Restore OEM-level performance and reliability with the PROX Piston Kit, manufactured in Japan and designed as a true OEM replacement for 250cc 2-stroke engines. It’s cast from a high-silicon aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely tight tolerances—helping you bring back strong compression, smooth running, and consistent power delivery.
This complete kit simplifies your top-end service by including the essential components in one package, saving time and helping ensure proper fit and function during rebuilds.
Key features:
✅ Japan-made OEM replacement design
✅ High-silicon aluminum alloy, CNC-machined to close tolerances
✅ Complete kit: piston, ring kit, wrist pin, and circlips
Benefits of use:
🔹 Helps restore compression and engine responsiveness after wear
🔹 Reduced friction and improved durability thanks to moly-coated skirt
🔹 Convenient all-in-one kit for faster, cleaner top-end rebuild planning
Technical specifications (where applicable):
📌 Displacement: 250 cc
📌 Engine type: 2-Stroke
📌 Bore size: 66.40 mm (Standard)
📌 Piston material: Aluminum alloy
📌 Skirt coating: Moly coated
📌 Vendor part number: 01.4322.B
Why choose this product/service?
⭐ Built to meet or exceed OEM specifications for dependable fitment and performance
⭐ Precision machining supports consistent operation and long service life
⭐ Complete kit contents help reduce sourcing mistakes during rebuilds
