Namura NA-10007-2 oversized piston kit for the Honda TRX350 Rancher series
Namura NA-10007-2 oversized piston kit for the Honda TRX350 Rancher series
The Namura NA-10007-2 is an oversized piston kit designed specifically for the Honda TRX350 Rancher series. The "-2" suffix indicates that this is a 0.50mm (0.020") oversize piston, which requires your engine cylinder to be bored and honed to match the larger diameter.
Vehicle Fitment
This kit fits all versions of the 350 Rancher produced between 2000 and 2006, including:
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Honda TRX350TM (FourTrax Rancher)
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Honda TRX350TE (FourTrax Rancher ES)
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Honda TRX350FM (FourTrax Rancher 4x4)
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Honda TRX350FE (FourTrax Rancher 4x4 ES)
Technical Specifications
| Feature | Measurement |
| Standard Bore | 78.50 mm |
| NA-10007-2 Bore | 79.00 mm (Actual piston is usually ~78.96mm to allow for clearance) |
| Piston Material | MOS2 (Molybdenum) Coated Skirts |
| Kit Contents | Piston, Rings, Wrist Pin, and Circlips |
Product Options
Based on your needs, you can choose between the standalone piston kit or a complete "Top End" repair kit, which includes the necessary gaskets for the job.
The Namura NA-10007-2 Piston Kit is the standard choice if you already have your gaskets. It features anodized domes for superior heat resistance and MOS2-coated skirts to reduce friction during the critical break-in period.
The Namura NA-10007-2K Top End Repair Kit is a more comprehensive solution. It includes the 0.50mm oversized piston kit along with a top-end gasket set, ensuring you have everything required to seal the engine back up after the cylinder is bored.
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