The NAMURA NA-10025K Top End Kit is designed for select Honda TRX250TM Recon models from 1997 through 2001. This standard-bore replacement kit features a 68.45 mm piston with an 11:1 compression ratio and includes the essential components needed for a dependable top-end rebuild. The kit includes the piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit.
Built using NAMURA’s hypereutectic casting process, the piston provides increased silicon content to help control expansion, improve wear resistance, and withstand elevated cylinder temperatures. The piston skirt uses a rolled-on MOS2 coating made from Teflon and molybdenum. This application method creates a durable bond while helping reduce friction, improve heat transfer, and minimize the risk of cold seizures during operation.
The piston also features a machined smooth head to reflect combustion heat and help reduce carbon buildup. Its anodized dome improves heat resistance and durability, offering greater strength than a non-anodized piston dome. Together, these features support consistent performance and long-term reliability in demanding recreational and utility ATV applications.
Manufacturer and vendor part number: NAMURA NA-10025K. Fitment includes the 1997, 1998, 1999, 2000, and 2001 Honda TRX250TM Recon with SRA suspension. Verify the model and year before installation to ensure correct application.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- Piston Size: 68.45 mm standard bore
- Compression Ratio: 11:1
- MOS2 Coated Skirt: Rolled-on Teflon and 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, durability, and piston strength
- Hypereutectic Casting: Higher silicon content helps control expansion and increase wear resistance
- Fitment: 1997–2001 Honda TRX250TM Recon with SRA suspension
- Brand: NAMURA
- Manufacturer Part Number: NA-10025K
- Vendor Part Number: NA-10025K
Fitment:
1997 Honda TRX250TM Recon [SRA]
1998 Honda TRX250TM Recon [SRA]
1999 Honda TRX250TM Recon [SRA]
2000 Honda TRX250TM Recon [SRA]
2001 Honda TRX250TM Recon [SRA]