Restore reliable top-end performance with the Namura NX-70004-BK Top End Kit, designed for 2003–2012 KTM 85 SX 17/14 motorcycles. This complete kit includes a piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit for a convenient engine rebuild solution. The kit is intended for use with the original Nikasil-plated cylinder and is engineered to provide dependable fit and function when servicing a worn or damaged top end.
The Namura piston uses a hypereutectic casting process that increases silicon content to help reduce expansion, improve wear resistance, and withstand elevated cylinder temperatures. Its MOS2, or Teflon/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 operation.
Additional piston features include machined-smooth heads to reflect combustion heat and help limit carbon buildup, along with anodized domes for improved heat resistance and durability. These design features support consistent combustion performance and long-term component protection. The included gasket kit, bearing, rings, wrist pin, and clips help provide the essential components needed for a comprehensive top-end service.
Fitment: Fits 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, and 2012 KTM 85 SX 17/14 models. Manufacturer part number: NX-70004-BK. Vendor part number: 185-7004B. Verify cylinder condition, piston clearance, and application details before installation.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- MOS2 Teflon/molybdenum-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 improves heat resistance and durability
- Hypereutectic casting process provides reduced expansion, increased wear resistance, and improved high-temperature performance
- Designed for 2003–2012 KTM 85 SX 17/14 models with a Nikasil-plated cylinder
- Brand: Namura
- Manufacturer part number: NX-70004-BK
- Vendor part number: 185-7004B
Fitment:
2003 KTM 85 SX (17/14)
2004 KTM 85 SX (17/14)
2005 KTM 85 SX (17/14)
2006 KTM 85 SX (17/14)
2007 KTM 85 SX (17/14)
2008 KTM 85 SX (17/14)
2008 KTM 85 XC
2009 KTM 85 SX (17/14)
2009 KTM 85 XC
2010 KTM 85 SX (17/14)
2011 KTM 85 SX (17/14)
2012 KTM 85 SX (17/14)