The NAMURA NA-10012-6K Top End Kit is a complete replacement solution for select Honda 680cc powersports applications. Designed with a 103.47 mm piston and 11:1 compression ratio, this kit includes the essential components needed to refresh the top end of the engine, including the piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit.
The piston features MOS2, or Teflon/molybdenum, coated skirts applied through a rolled-on process for a stronger bond than conventional spray-on coatings. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures. A hypereutectic casting process adds silicon for controlled expansion, increased wear resistance, and improved durability under higher cylinder temperatures.
Machined smooth heads help reflect combustion heat and reduce carbon buildup, while the anodized dome improves heat resistance and durability. These design features support reliable operation and long-term performance in demanding riding and utility conditions. The NAMURA NA-10012-6K is manufactured by NAMURA and is identified by manufacturer and vendor part number NA-10012-6K.
Fitment: This top-end kit fits select 2014–2016 Honda SXS700M2 Pioneer 700 models, 2010–2013 Honda MUV700 Big Red models, and 2006–2008 Honda TRX680FA Rincon IRS models. Confirm the vehicle model, year, engine configuration, and piston specifications before installation.
Features:
- Complete top-end kit: Includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- 103.47 mm piston size: Designed for compatible Honda 680cc engine applications
- 11:1 compression ratio: Supports the specified engine configuration and replacement requirements
- MOS2-coated skirts: Helps reduce friction, improve heat transfer, and minimize cold-seizure risk
- Machined smooth head: Helps reflect combustion heat and reduce carbon buildup
- Anodized dome: Improves heat resistance and piston durability
- Hypereutectic casting: Provides controlled expansion, wear resistance, and improved high-temperature performance
- Fitment: Fits select Honda Pioneer 700, MUV700 Big Red, and TRX680FA Rincon IRS models
- Brand: NAMURA
- Manufacturer and vendor part number: NA-10012-6K
Fitment:
2006 Honda TRX680FA Rincon [IRS]
2007 Honda TRX680FA Rincon [IRS]
2008 Honda TRX680FA Rincon [IRS]
2009 Honda TRX680FA Rincon [IRS]
2010 Honda Muv700 Big Red
2010 Honda TRX680FA Rincon [IRS]
2011 Honda Muv700 Big Red
2011 Honda TRX680FA Rincon [IRS]
2012 Honda Muv700 Big Red
2012 Honda TRX680FA Rincon [IRS]
2013 Honda Muv700 Big Red
2013 Honda TRX680FA Rincon [IRS]
2014 Honda SXS700M2 Pioneer 700
2014 Honda TRX680FA Rincon [IRS]
2015 Honda SXS700M2 Pioneer 700
2015 Honda TRX680FA Rincon [IRS]
2016 Honda SXS700M2 Pioneer 700
2016 Honda TRX680FA Rincon [IRS]
2017 Honda SXS700M2 Pioneer 700
2017 Honda TRX680FA Rincon [IRS]
2023 Honda SXS700M2 Pioneer 700
2023 Honda TRX680FA Rincon [IRS]