Piston Pin Bearing

Restore smooth, reliable top-end operation with a PROX piston pin bearing manufactured in leading Japanese OEM factories. Designed to exact OEM specifications, it delivers a precise, direct-fit solution when rebuilding or refreshing your engine—helping reduce friction and wear at the piston pin/small-end interface.

If your engine is being serviced (or you’re performing a top-end rebuild), replacing the piston pin bearing is a smart preventative step that can help protect expensive components and keep performance consistent ride after ride.

Key features:

• ✅ OEM-spec fitment – designed to match original dimensions for straightforward installation
• ✅ Japanese OEM-level manufacturing – produced by leading OEM factories for dependable quality
• ✅ Cost-effective replacement – direct OEM replacement without unnecessary complexity

Benefits of use:

• 🔹 Helps reduce friction and wear in the small-end/piston pin area
• 🔹 Supports smooth engine operation and consistent performance after rebuilds
• 🔹 A reliable choice for routine engine maintenance and preventative servicing

Technical specifications:

• 📌 Brand: PROX
• 📌 Vendor part number: 21.4204
• 📌 Product type: Bearing (piston pin / small-end)
• 📌 Units: Each
• 📌 Application: Upper pushrod (as listed by supplier)

Why choose this product?

• ⭐ Built to OEM specifications for correct fit and function
• ⭐ Made in leading Japanese OEM factories for trusted manufacturing quality
• ⭐ A smart maintenance part to include during engine servicing and rebuilds