Piston Kit

Restore like-new compression and performance with this PROX piston kit, manufactured in Japan and designed as a precise OEM replacement. The piston is cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances for dependable fit and long service life.

If your 85cc 2-stroke is losing power, getting harder to start, or due for a top-end refresh, this complete kit simplifies the job by supplying the key components in one package—helping you get back to consistent throttle response and reliability.

Key features:

• ✅ Japan-manufactured OEM-replacement quality
• ✅ High-silicon aluminum alloy construction, CNC-machined for accuracy
• ✅ Complete kit: piston, ring kit, wrist pin and circlips

Benefits of use:

• 🔹 Helps restore compression and overall engine efficiency
• 🔹 Accurate tolerances support correct fitment and smoother running
• 🔹 Complete kit reduces guesswork and saves time during rebuilds

Technical specifications (if needed):

• 📌 Displacement: 85 cc
• 📌 Engine type: 2-stroke
• 📌 Bore size: 48.50 mm (standard) / Piston size: 48.47 mm
• 📌 Skirt coating: non-coated
• 📌 Vendor part number: 01.4124.C

Why choose this product/service?

• ⭐ Built to meet or exceed OEM specifications for confident rebuilds
• ⭐ Proven PROX quality with complete, rebuild-ready contents
• ⭐ A smart choice for fast, correct top-end servicing and dependable riding