Upgrade and refresh your 4-stroke top end with a Wossner Pro Series forged piston kit built for durability, efficient lubrication and consistent sealing. The lightweight forged aluminum-alloy piston is designed with tight wall clearance to help the engine run quieter, while the coated skirt reduces friction and supports a smoother break-in. If you’re rebuilding after wear or chasing reliable performance under load, this kit delivers the key components in one matched package.
Enhanced wrist pin lubrication features—such as piston pin oiling slots, radial boss machining and annular grooves—help improve oil delivery where it matters most. Ring land treatment supports better ring seal and oil control, contributing to stable compression and clean running over time.
Key features:
✅ Enhanced wrist pin lubrication design (oiling slots, radial boss machining, annular grooves)
✅ Lightweight forged piston with tight clearance for quieter operation
✅ Coated skirt to reduce friction and improve break-in performance
Benefits of use:
🔹 Better lubrication at the wrist pin area for improved longevity under stress
🔹 Reduced friction for smoother running and more efficient break-in
🔹 Matched kit components help simplify top-end service and reduce fitment guesswork
Technical specifications (as provided):
📌 Brand: WOSSNER (Pro Series)
📌 Engine type: 4-Stroke
📌 Bore size: 77.02 mm (+0.02 mm oversize), Style: Standard Size C
📌 Compression ratio: 13.5:1
📌 Material: Forged aluminum alloy
📌 Two-ring design
Kit includes:
📌 Piston #8635DC
📌 Ring Set #RIK77.00D
📌 Wrist Pin #WP059-SP
📌 Retaining Clips #CW16
Why choose this product?
⭐ Pro Series forged construction for demanding 4-stroke riding and rebuilds
⭐ Complete kit (piston, rings, pin, locks) for a straightforward top-end refresh
⭐ Designed to improve sealing, lubrication and break-in for dependable performance
