Restore top-end performance on your ATV with the Namura NA-10005K top end kit. This 73.95 mm standard-bore kit is designed for the 11:1 compression configuration used in compatible Honda TRX300EX Sportrax applications. The kit includes the piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit needed for a comprehensive top-end rebuild.
The piston uses a hypereutectic casting process that increases silicon content to help control expansion, improve wear resistance, and withstand elevated cylinder temperatures. Its MOS2, or Teflon/molybdenum, coated skirts use a rolled-on application process for a durable coating bond. This design helps transfer heat, reduce friction, and minimize the risk of cold seizures during operation.
Machined smooth piston heads help reflect combustion heat and reduce carbon buildup, while the anodized dome improves heat resistance and durability. These features support dependable operation and help protect the piston in demanding riding conditions. The Namura NA-10005K top end kit fits 1993 through 2002 Honda TRX300EX Sportrax models. Verify the engine configuration and bore specification before installation to ensure proper fitment.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- 73.95 mm standard-bore piston designed for an 11:1 compression configuration
- 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, increased wear resistance, and improved high-temperature performance
- Fitment: 1993-2002 Honda TRX300EX Sportrax
- Brand: Namura
- Manufacturer part number: NA-10005K
- Vendor part number: 186-1005
Fitment:
1993 Honda TRX300EX Sportrax
1994 Honda TRX300EX Sportrax
1995 Honda TRX300EX Sportrax
1996 Honda TRX300EX Sportrax
1997 Honda TRX300EX Sportrax
1998 Honda TRX300EX Sportrax
1999 Honda TRX300EX Sportrax
2000 Honda TRX300EX Sportrax
2001 Honda TRX300EX Sportrax
2002 Honda TRX300EX Sportrax
2003 Honda TRX300EX Sportrax
2004 Honda TRX300EX Sportrax
2005 Honda TRX300EX Sportrax
2006 Honda TRX300EX Sportrax
2007 Honda TRX300EX Sportrax
2008 Honda TRX300EX Sportrax
2009 Honda TRX300EX Sportrax
2009 Honda TRX300X