Piston Kit

This Wossner Pro Series Piston Kit is designed for riders and builders who want dependable top-end performance with reduced friction and improved mechanical refinement. A high-quality, permanent skirt coating helps minimize piston rock for quieter operation and smoother running—ideal when refreshing a worn top end or building for consistent performance.

Thanks to optimized machining, the piston stays lightweight without sacrificing strength where it matters most (crown and skirt wall cross-section). Forged from aerospace-grade aluminum alloy, it’s built to handle demanding riding conditions and high-stress engine operation.

Key features:

• ✅ Permanent skirt coating to reduce friction and piston rock
• ✅ Lightweight, optimized machining while maintaining strength in critical areas
• ✅ Forged aerospace-grade aluminum alloy construction

Benefits of use:

• 🔹 Smoother, quieter engine behavior thanks to reduced piston movement and friction
• 🔹 Reliable choice for top-end servicing—complete kit minimizes missing-parts hassle
• 🔹 Performance-focused design with a high 14.4:1 compression ratio

Technical specifications:

• 📌 Brand: Wossner
• 📌 Series/Model: Pro Series
• 📌 Engine type: 4-Stroke
• 📌 Displacement: 250 cc
• 📌 Bore size: 78.00 mm
• 📌 Piston diameter: 77.96 mm
• 📌 Compression ratio: 14.4:1
• 📌 Piston material: Forged aluminum alloy
• 📌 Ring material: Steel / cast
• 📌 Skirt coating: Molybdenum disulphite
• 📌 Design notes: Double bridge forging, two-ring design
• 📌 Kit includes: piston, rings, pin and clips
• 📌 Vendor part number: 8966DA

Why choose this product?

• ⭐ High-quality Wossner forging and performance-focused engineering
• ⭐ Complete piston kit for a cleaner, faster rebuild process
• ⭐ Built to deliver consistent performance and durability in demanding use