Namura NX-10000-4K Top End Kit 54.94 mm, 11:1 Compression for Honda CR125R

Restore dependable top-end performance with the Namura NX-10000-4K Top End Kit for select Honda CR125R two-stroke motorcycles. This kit includes a piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit for a comprehensive rebuild solution. The 54.94 mm piston size and 11:1 compression ratio are designed for the specified application and provide a precise fit when rebuilding the engine.

The Namura piston uses a hypereutectic casting process with increased silicon content to help control expansion, improve wear resistance, and withstand elevated cylinder temperatures. Its MOS2, or Teflon/Molybdenum, coated skirts use a rolled-on application process that creates a durable bond while helping reduce friction, improve heat transfer, and minimize the risk of cold seizures. The anodized dome adds heat resistance and durability, while the machined smooth head helps reflect combustion heat and reduce carbon buildup.

This Namura top-end kit fits 1992-1999 Honda CR125R models, including model years 1992, 1993, 1994, 1995, 1996, 1997, 1998, and 1999. Verify the motorcycle model year, cylinder condition, and required piston size before installation. The manufacturer part number is NX-10000-4K, and the vendor part number is 185-10004.

Features:

• Complete top-end kit: Includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
• Piston size: 54.94 mm piston for the specified Honda CR125R application
• Compression ratio: 11:1 design for compatible engine configurations
• MOS2-coated skirts: Rolled-on Teflon/Molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk
• Machined smooth head: Reflects combustion heat and helps reduce carbon buildup
• Anodized dome: Improves heat resistance and piston durability
• Hypereutectic construction: Higher silicon content helps control expansion and increase wear resistance
• Fitment: Fits 1992-1999 Honda CR125R models
• Brand: Namura
• Manufacturer part number: NX-10000-4K
• Vendor part number: 185-10004