Namura NA-40004 Piston Kit 99.97mm for Yamaha
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The Namura NA-40004 Piston Kit 99.97mm is an application-specific engine component for Yamaha Rhino 660 Auto/XTZ660 Tenere. It is designed for the verified year, make and model combinations listed below.
Key Features
- Includes piston, rings, wrist pin and circlips for the listed application
- MOS2-coated skirt helps reduce friction, while the machined crown and anodized dome support heat resistance
- Confirm bore size and oversize specification in the fitment notes before ordering
- Fitment detail: Piston diameter: 99.97 mm
Manufacturer: Namura
Part Number: NA-40004
Vehicle Fitment
| Year | Make | Model | Fitment Notes |
|---|---|---|---|
| 2004-2007 | Yamaha | Rhino 660 Auto | Piston diameter: 99.97 mm |
| 1991-1998 | Yamaha | XTZ660 Tenere | Piston diameter: 99.97 mm |
| 2002-2008 | Yamaha | YFM660F Grizzly 4x4 | Piston diameter: 99.97 mm |
| 2001-2005 | Yamaha | YFM660R Raptor | Piston diameter: 99.97 mm |
Fitment note: Match the year, make, model and any listed specifications to your machine before ordering. Professional installation is recommended for internal engine components.
Shipping & Returns
- Most orders process within 1 business day.
- 30-day returns on new, unused items.
Once your Steel Steeds gear leaves our warehouse, it typically arrives at your doorstep within 2–4 business days, unless otherwise noted. We partner with trusted shipping carriers to ensure your off-road essentials get to you fast and hassle-free. So gear up with confidence—your next big adventure is just around the corner!
Changed your mind? No problem. Most new, unused, and uninstalled items can be returned within 30 days of delivery.
We do not charge a standard restocking fee. Customers are responsible for return shipping unless the item arrived damaged, defective, or incorrect.
Items must be returned in original packaging and in resalable condition.
We are committed to providing quality products and stand behind our items with a warranty. Exact coverage may vary, so please refer to our warranty page for more details!
