Namura NX-10000-BK1 53.95 mm Top End Kit for 2000–2002 Honda CR125R

Restore top-end performance and reliability with the Namura NX-10000-BK1 Top End Kit. Designed for the 2000, 2001, and 2002 Honda CR125R, this 53.95 mm kit includes the essential components needed for a complete top-end service, including a piston, piston rings, wrist pin, circlips, top-end bearing, and gasket kit. The kit is engineered for dependable fitment and consistent operation in compatible Honda two-stroke engines.

The Namura piston uses a hypereutectic casting process that provides increased silicon content for reduced expansion and improved wear resistance. This construction helps the piston withstand elevated cylinder temperatures while maintaining reliable performance. MOS2, or Teflon/molybdenum, coated skirts are applied using a rolled-on process that creates a stronger bond than conventional spray-on coatings. The coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures.

The piston also features a machined smooth head and anodized dome. The smooth head helps reflect combustion heat and reduce carbon buildup, while the anodized dome improves heat resistance and durability. Together, these features help protect the piston crown and support consistent combustion performance. The 11:1 compression configuration is suited to the specified Honda CR125R applications.

This Namura top-end kit is identified by manufacturer part number NX-10000-BK1 and vendor part number 185-1000B1. Verify engine specifications and existing bore size before installation to confirm proper fitment. The kit fits 2000 Honda CR125R, 2001 Honda CR125R, and 2002 Honda CR125R models.

Features:

• Complete top-end kit includes piston, rings, wrist pin, circlips, top-end bearing, and gasket kit
• 53.95 mm piston size with an 11:1 compression configuration
• MOS2 Teflon/molybdenum-coated skirt helps reduce friction, improve heat transfer, and minimize cold-seizure risk
• Machined smooth piston head helps reflect combustion heat and reduce carbon buildup
• Anodized dome improves heat resistance and piston durability
• Hypereutectic casting process provides reduced expansion and increased wear resistance
• Fits 2000, 2001, and 2002 Honda CR125R models
• Brand: Namura
• Manufacturer part number: NX-10000-BK1
• Vendor part number: 185-1000B1