Piston Kit for 4-Stroke

Bring your 4-stroke engine back to strong, consistent performance with the PROX Piston Kit. This kit is built for riders and mechanics who want a dependable top-end refresh using precisely manufactured components. The piston is CNC-machined on state-of-the-art equipment and made from a low-expansion, low-friction aluminum alloy, helping maintain correct clearances and smooth operation as temperatures rise.

Whether you’re rebuilding after hours of hard riding or replacing worn parts to prevent power loss, this complete kit simplifies the job by including the essential components needed for installation.

Key features:

• ✅ Complete kit included – piston, rings, wrist pin and circlips
• ✅ Precision CNC machining – designed for accurate fit and consistent results
• ✅ Low-expansion, low-friction alloy – supports durability and stable clearances

Benefits of use:

• 🔹 Reliable rebuild solution – ideal for restoring compression and performance on a worn top end
• 🔹 Less guesswork – matched kit components reduce sourcing time and installation hassle
• 🔹 Built for real riding conditions – materials and machining aimed at longevity under heat and load

Technical specifications:

• 📌 Brand: PROX
• 📌 Engine type: 4-Stroke
• 📌 Displacement: 450 cc
• 📌 Bore (oversize): Standard
• 📌 Bore size: 95.00 mm
• 📌 Piston size: 94.96 mm
• 📌 Compression ratio: 12.5:1
• 📌 Piston material: Aluminum alloy
• 📌 Skirt coating: Non-coated
• 📌 Type: Standard Size B
• 📌 Units: Kit
• 📌 Vendor part number: 01.2429.B

Why choose this product?

• ⭐ Quality-focused manufacturing with modern CNC machining for dependable fitment
• ⭐ All-in-one piston kit (rings, pin and clips included) for a cleaner rebuild process
• ⭐ Smart choice for maintenance when you want reliable parts for a 4-stroke top-end refresh