Restore reliable engine performance with the NAMURA NA-10001K Top End Kit for Honda TRX400FW Foreman 4x4 models. Designed for an 85.97 mm standard-bore application with an 11:1 compression ratio, this complete kit includes the piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit needed for a comprehensive top-end rebuild. The kit is engineered for direct fitment on 1995-2003 Honda TRX400FW Foreman 4x4 vehicles.
The piston features MOS2, or Teflon/molybdenum, coated skirts applied through a rolled-on process that creates a durable bond. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures during operation. Machined smooth heads help reflect combustion heat and reduce carbon buildup, supporting piston protection and consistent engine performance. The anodized dome adds heat resistance and durability, while the hypereutectic casting process provides increased silicon content for controlled expansion and improved wear resistance at higher cylinder temperatures.
Use the NAMURA manufacturer part number NA-10001K and vendor part number 186-1001 when confirming application requirements. This top-end rebuild kit is intended for the following fitment: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, and 2003 Honda TRX400FW Foreman 4x4 models. Verify the existing cylinder, bore specification, compression requirements, and engine configuration before installation.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- 85.97 mm standard-bore piston designed for an 11:1 compression ratio
- MOS2 Teflon/molybdenum-coated skirts help 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 controlled expansion and increased wear resistance
- Fits 1995-2003 Honda TRX400FW Foreman 4x4 models
- Brand: NAMURA; manufacturer part number: NA-10001K; vendor part number: 186-1001
Fitment:
1995 Honda TRX400FW Foreman 4X4
1996 Honda TRX400FW Foreman 4X4
1997 Honda TRX400FW Foreman 4X4
1998 Honda TRX400FW Foreman 4X4
1999 Honda TRX400FW Foreman 4X4
2000 Honda TRX400FW Foreman 4X4
2001 Honda TRX400FW Foreman 4X4
2002 Honda TRX400FW Foreman 4X4
2003 Honda TRX400FW Foreman 4X4