Restore reliable top-end performance with the NAMURA Top End Kit, manufacturer part number NA-11001-2K. Designed for select Arctic Cat 300 ATV applications, this kit includes the piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit needed for a comprehensive top-end rebuild. The 68.97 mm (+0.50 mm) piston size and 11:1 compression ratio are intended for compatible overbore applications and should be matched to the cylinder condition and engine specifications before installation.
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 and molybdenum, coated skirts use a rolled-on application process designed to create a stronger bond than conventional spray-on coatings. This coating helps reduce friction, improve heat transfer, and minimize the risk of cold seizures during engine operation.
Additional piston features include a machined smooth head to reflect combustion heat and help reduce carbon buildup, along with an anodized dome engineered for improved heat resistance and durability. These design features support consistent performance and long-term protection in demanding ATV use. The kit fits 1998–2005 Arctic Cat 300 4X4 models and 2001–2002 Arctic Cat 300 2X4 models. Confirm the year, model, cylinder bore, and required oversize before ordering. Vendor part number: 186-11012.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- Size: 68.97 mm (+0.50 mm) piston for compatible overbore applications
- Compression: 11:1 ratio for select Arctic Cat 300 engine configurations
- Brand: NAMURA
- Manufacturer Part Number: NA-11001-2K
- Vendor Part Number: 186-11012
- MOS2-coated piston 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 piston dome provides increased heat resistance and durability
- Hypereutectic casting process helps control expansion and improve wear resistance
- Fitment: 1998–2005 Arctic Cat 300 4X4 and 2001–2002 Arctic Cat 300 2X4
Fitment:
1998 Arctic Cat 300 2X4
1998 Arctic Cat 300 4X4
1999 Arctic Cat 300 2X4
1999 Arctic Cat 300 4X4
2000 Arctic Cat 300 2X4
2000 Arctic Cat 300 4X4
2001 Arctic Cat 300 2X4
2001 Arctic Cat 300 4X4
2002 Arctic Cat 300 2X4
2002 Arctic Cat 300 4X4
2003 Arctic Cat 300 2X4
2003 Arctic Cat 300 4X4
2004 Arctic Cat 300 4X4
2005 Arctic Cat 300 4X4