The Namura NA-10001-3K Top End Kit is designed for 1995–2003 Honda TRX400FW Foreman 4x4 models. This complete kit includes the piston, piston rings, wrist pin, wrist pin clips, top end bearing, and gasket kit needed for a dependable top-end rebuild. The 86.72 mm piston size and 11:1 compression ratio are suited to applications requiring a reliable replacement piston assembly with upgraded durability.
The piston uses Namura’s hypereutectic casting process, which increases silicon content to help reduce expansion, improve wear resistance, and withstand elevated cylinder temperatures. MOS2, or Teflon/molybdenum, coated skirts are applied using a rolled-on process that creates a durable bond while helping reduce friction, improve heat transfer, and minimize the risk of cold seizures. Machined smooth heads help reflect combustion heat and reduce carbon buildup on the piston crown.
Anodized domes provide increased heat resistance and durability compared with non-anodized piston designs. The included rings, wrist pin, clips, top-end bearing, and gasket kit help simplify installation when servicing the upper engine assembly. Verify cylinder condition, piston clearance, compression requirements, and gasket specifications before installation.
Fitment: 1995–2003 Honda TRX400FW Foreman 4x4. This Namura top-end kit is intended for the listed Honda ATV applications and should be matched to the correct bore specification and engine configuration before purchase.
Features:
- Complete top-end kit includes piston, rings, wrist pin, clips, top-end bearing, and gasket kit
- 86.72 mm piston size with an 11:1 compression ratio for compatible Honda TRX400FW Foreman 4x4 applications
- 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, increased wear resistance, and improved high-temperature performance
- Fits 1995–2003 Honda TRX400FW Foreman 4x4 models
- Brand: Namura
- Manufacturer part number: NA-10001-3K
- Vendor part number: NA-10001-3K
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