The Namura NX-10070-8K Top End Kit is designed for select Honda CRF70F and XR70R models requiring a 48.97 mm, +2.00 mm replacement piston configuration with an 11:1 compression ratio. This complete kit includes the piston, piston rings, wrist pin, circlips, top-end bearing, and gasket kit for a convenient engine rebuild solution. The kit is engineered to support reliable performance, improved durability, and proper top-end fitment when installed according to the manufacturer’s specifications.
Namura uses a hypereutectic casting process to provide increased silicon content, helping reduce piston expansion and improve wear resistance under elevated cylinder temperatures. The piston features MOS2, or Teflon/molybdenum, coated skirts applied through a rolled-on process designed to create a durable bond. This coating helps reduce friction, improve heat transfer, and minimize the risk of cold seizures during engine operation.
The machined smooth head is designed to reflect combustion heat and help reduce carbon buildup, supporting piston protection and consistent combustion performance. An anodized dome adds heat resistance and durability, making the piston suitable for demanding off-road and recreational riding applications. This Namura top-end kit fits 2004–2009, 2011, and 2012 Honda CRF70F models, as well as 2000 and 2001 Honda XR70R models. Verify the model year, bore specification, and engine requirements before installation.
Features:
- Complete Top End Kit: Includes piston, rings, wrist pin, circlips, top-end bearing, and gasket kit.
- MOS2-Coated Skirts: Rolled-on Teflon and molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk.
- Machined Smooth Head: Helps reflect combustion heat and reduce carbon buildup for improved piston protection.
- Anodized Dome: Increases heat resistance and piston durability under demanding operating conditions.
- Hypereutectic Casting: Higher silicon content helps reduce expansion, improve wear resistance, and withstand elevated cylinder temperatures.
- Fitment: Fits select 2004–2009, 2011, and 2012 Honda CRF70F models and 2000–2001 Honda XR70R models.
- Brand: Namura.
- Manufacturer Part Number: NX-10070-8K.
- Vendor Part Number: 185-10708.
Fitment:
1997 Honda XR70R
1998 Honda XR70R
1999 Honda XR70R
2000 Honda XR70R
2001 Honda XR70R
2002 Honda XR70R
2003 Honda XR70R
2004 Honda CRF70F
2005 Honda CRF70F
2006 Honda CRF70F
2007 Honda CRF70F
2008 Honda CRF70F
2009 Honda CRF70F
2011 Honda CRF70F
2012 Honda CRF70F