Namura .020 Over Bore Piston Kit for Yamaha 660 Raptor, Grizzly & Rhino 100.5mm
Namura .020 Over Bore Piston Kit for Yamaha 660 Raptor, Grizzly & Rhino 100.5mm
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Namura .020 Over Bore Piston Kit for Yamaha
This .020 over bore piston kit for Yamaha 660 Raptor, Grizzly, and Rhino models provides a 100.5mm bore size to restore engine performance during a rebuild. It includes a high-quality piston, rings, and wrist pin for a reliable top-end overhaul.
Overview
The Namura .020 over bore piston kit is designed for Yamaha 660 Raptor, Grizzly, and Rhino ATVs and UTVs. This .020 over bore piston kit increases displacement slightly while refreshing worn cylinders. It is an ideal choice for rebuilds requiring a 100.5mm piston.
Built For Performance
- 100.5mm bore diameter for .020 over stock
- Includes piston, rings, and wrist pin
- High-strength aluminum alloy construction
- Precision-machined for accurate fitment
- Designed for Yamaha 660 Raptor, Grizzly, and Rhino
Fits These Machines
- for Yamaha 660 Raptor
- for Yamaha Grizzly 660
- for Yamaha Rhino 660
On-The-Job Use
- Engine rebuild for Yamaha 660 Raptor sport ATVs
- Top-end overhaul for Yamaha Grizzly utility ATVs
- Restoring compression in Yamaha Rhino UTVs
- Performance rebuilds requiring a .020 over bore
Specs At A Glance
| Bore Size | 100.5mm |
| Oversize | .020 in (0.5mm) |
| Application | Yamaha 660 Raptor, Grizzly, Rhino |
| Includes | Piston, rings, wrist pin |
Good To Know
Q: Will this piston kit work with stock cylinder? A: This .020 over bore piston kit requires the cylinder to be bored to 100.5mm, so a stock cylinder must be machined to the proper oversize.
Q: Does it include circlips? A: Yes, the kit comes with the wrist pin and circlips for secure installation.
Slight variation in finish or dimensions may occur between production runs, and serial number can affect fitment, so confirm compatibility before ordering.
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