Piston Kit

Restore like-new compression and reliability with this PROX piston kit, manufactured in Japan and designed as a direct OEM replacement for 250cc 2-stroke engines. It’s cast from a high-silicon-content aluminum alloy and CNC-machined to extremely close tolerances, helping you achieve consistent fitment and dependable engine performance.

If your top end is tired, starting becomes harder, power fades, or piston wear is a concern, this complete kit makes a rebuild straightforward—providing the key components in one package so you can get back to riding with confidence.

Key features:

• ✅ OEM replacement design manufactured in Japan for dependable fit and function
• ✅ High-silicon aluminum alloy + CNC machining to meet or exceed OEM specifications
• ✅ Complete kit including piston, ring kit, wrist pin and circlips

Benefits of use:

• 🔹 Reliable rebuild choice for restoring compression and throttle response
• 🔹 Reduced friction thanks to the moly-coated skirt for smoother operation
• 🔹 Time-saving service—critical top-end parts included in one kit

Technical specifications:

• 📌 Displacement: 250 cc
• 📌 Engine type: 2-Stroke
• 📌 Bore size: 66.40 mm
• 📌 Piston size: 66.36 mm
• 📌 Type: Standard Size C (Standard oversize / standard compression)
• 📌 Skirt coating: Moly coated
• 📌 Material: Aluminum alloy

Why choose this product/service?!

• ⭐ Japan-made PROX quality designed to meet or exceed OEM specs
• ⭐ Ideal for routine top-end rebuilds where correct tolerances matter
• ⭐ Complete kit contents help ensure you have what you need for installation