Upgrade your top-end with a Wossner Pro Series 4-stroke piston kit designed for efficient lubrication, reduced friction and consistent ring seal. This kit is a smart choice when you want a quieter-running engine and a reliable rebuild using parts that are engineered to work together.
Enhanced piston pin oiling slots, radial boss machining and annular grooves help improve wrist pin lubrication, while the coated skirt reduces friction for smoother break-in. Ring land treatment supports better ring seal and oil control—helping your engine maintain strong performance and durability over time.
Key features:
✅ Enhanced wrist pin lubrication (oiling slots + annular grooves)
✅ Lightweight forged aluminum alloy piston for quieter operation with tight wall clearance
✅ Skirt coating for reduced friction and improved break-in performance
Benefits of use:
🔹 Better lubrication where it matters for increased reliability
🔹 Improved ring seal and oil control for consistent power delivery
🔹 Complete, matched kit simplifies your rebuild and reduces guesswork
Technical specifications (as provided):
📌 Engine type: 4-Stroke
📌 Bore size: 77.00 mm (Standard)
📌 Piston size: 76.96 mm
📌 Compression ratio: 13.5:1
📌 Material: Forged aluminum alloy
📌 Model/series: Pro Series
📌 Kit contents: Piston #8635DA, Ring Set #RIK77.00D, Wrist Pin #WP059-SP, Retaining Clips #CW16
Why choose this product?
⭐ Pro Series quality with performance-focused machining and coatings
⭐ A complete kit (piston + rings + pin + clips) for a straightforward top-end service
⭐ Designed to improve break-in, sealing and long-term engine smoothness
