Top End Piston Bearing

WISECO Top End Piston Bearing (WB1013) is designed for riders and builders who demand reliable top-end performance under hard use. This bearing supports the piston/wrist-pin (small-end) interface, helping reduce friction and wear for smoother running and longer engine life. If you’re refreshing a top end or chasing consistent performance at high engine speeds, a quality piston bearing is a small part that makes a big difference.

Manufactured to high standards and case-hardened for maximum durability, it’s built to handle high-RPM operation while maintaining smooth movement and dependable service.

Key features:

• ✅ High-quality construction: made to strict standards for dependable fit and function
• ✅ Long service life: case-hardened to resist wear under load
• ✅ Smooth high-RPM operation: designed to run reliably at elevated engine speeds

Benefits of use:

• 🔹 More reliable top end: helps prevent premature wear in the wrist-pin/small-end area
• 🔹 Smoother engine feel: supports consistent movement under high load and speed
• 🔹 Smart rebuild choice: ideal to replace during top-end service for peace of mind

Technical specifications:

• 📌 Brand: WISECO
• 📌 Vendor part number: WB1013
• 📌 Application: Piston (Top End)
• 📌 Inside diameter: 15 mm
• 📌 Outside diameter: 19 mm
• 📌 Length: 20 mm
• 📌 Size: Standard
• 📌 Units: Each

Why choose this product?

• ⭐ Built for strength and dependable performance in demanding riding conditions
• ⭐ High-quality, case-hardened bearing for long-lasting service
• ⭐ Great preventative replacement during top-end rebuilds to avoid avoidable failures