The NAMURA NA-11001K top-end kit is designed for compatible Arctic Cat 300 ATV applications requiring a standard-bore piston assembly. This kit includes the piston, piston rings, wrist pin, wrist-pin clips, top-end bearing, and gasket kit for a comprehensive upper-engine rebuild. It is engineered for 11:1 compression and helps restore dependable performance, compression, and durability in properly serviced engines.
Fitment includes the 1998–2005 Arctic Cat 300 4X4 and the 2001–2002 Arctic Cat 300 2X4. Verify the model year, engine configuration, bore specification, and existing component measurements before installation to ensure correct application. The standard 68.47 mm piston size is intended for compatible, unmodified standard-bore cylinders.
The piston uses a hypereutectic casting process that increases silicon content to help control expansion, improve wear resistance, and withstand higher cylinder temperatures. MOS2, or Teflon/molybdenum, coated skirts help reduce friction, improve heat transfer, and minimize the risk of cold seizure. The rolled-on coating process provides a stronger bond than many spray-applied alternatives.
Machined smooth heads help reflect combustion heat and reduce carbon buildup around the piston crown, while the anodized dome improves heat resistance and durability. NAMURA manufactures this kit for reliable service in demanding ATV applications. Follow the manufacturer’s installation procedures, inspect cylinder condition and clearances, and use the included gasket components as appropriate for the rebuild.
Features:
- Complete top-end kit: Includes piston, rings, wrist pin, clips, top-end bearing, and gasket kit
- Standard bore: 68.47 mm piston specification for compatible Arctic Cat 300 cylinders
- 11:1 compression: Supports proper compression for specified applications
- MOS2-coated skirts: Helps reduce friction, improve heat transfer, and minimize cold-seizure risk
- Machined smooth heads: Reflects combustion heat and helps reduce carbon buildup
- Anodized dome: Improves heat resistance and piston durability
- Hypereutectic construction: Provides controlled expansion, added wear resistance, and improved high-temperature capability
- Fitment: Fits 1998–2005 Arctic Cat 300 4X4 and 2001–2002 Arctic Cat 300 2X4 models
- Brand: NAMURA
- Manufacturer part number: NA-11001K
- Vendor part number: 186-1101
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