The Namura NX-10080K1 Top End Kit is designed for select Honda CR80R two-stroke motorcycles with a Nikasil-plated cylinder and a 46.94 mm standard bore. This complete top-end replacement kit includes a piston, piston rings, wrist pin, wrist-pin clips, top-end bearing, and gasket kit for a convenient engine rebuild solution. It fits 1992–2002 Honda CR80R models, including model years 1992 through 2002 as listed by the manufacturer.
Built using Namura's hypereutectic casting process, the piston provides increased silicon content to help reduce expansion, improve wear resistance, and withstand higher cylinder temperatures. The MOS2, or Teflon and molybdenum, coated skirts use a rolled-on application process designed to create a stronger bond than conventional spray-on coatings. This finish helps reduce friction, improve heat transfer, and minimize the risk of cold seizures during engine operation.
The piston also features a machined smooth head to reflect combustion heat and help reduce carbon buildup, supporting piston protection and consistent performance. An anodized dome improves heat resistance and durability, while providing greater strength than a non-anodized piston dome. The included components are engineered to work together for proper top-end service when rebuilding a compatible Honda CR80R engine. Verify cylinder condition, bore specifications, and model-year fitment before installation.
Features:
- Complete Top End Kit: Includes piston, rings, wrist pin, wrist-pin clips, top-end bearing, and gasket kit.
- Application: Fits 1992–2002 Honda CR80R models with a Nikasil-plated cylinder and 46.94 mm standard bore.
- MOS2-Coated Skirts: Rolled-on Teflon and molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk.
- Machined Smooth Head: Reflects combustion heat and helps reduce carbon buildup for improved piston protection.
- Anodized Dome: Increases heat resistance and durability compared with a non-anodized piston dome.
- Hypereutectic Construction: Higher silicon content helps reduce expansion, improve wear resistance, and withstand elevated cylinder temperatures.
Fitment:
1992 Honda CR80R
1993 Honda CR80R
1994 Honda CR80R
1995 Honda CR80R
1996 Honda CR80R
1997 Honda CR80R
1998 Honda CR80R
1999 Honda CR80R
2000 Honda CR80R
2001 Honda CR80R
2002 Honda CR80R