Namura .040 Over Bore Piston Kit for Polaris 300 Xplorer Xpress Big Boss 75.5mm
Namura .040 Over Bore Piston Kit for Polaris 300 Xplorer Xpress Big Boss 75.5mm
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.040 Over Bore Piston Kit for Polaris
This .040 over bore piston kit, manufactured by Namura, is designed to fit Polaris 300 Xplorer, Xpress, and Big Boss ATVs, offering a reliable replacement with a 75.5mm bore size.
Overview
The Namura .040 over bore piston kit is a high-quality aftermarket component for Polaris 300 models. It provides a cost-effective solution to restore engine performance after cylinder wear. The kit includes piston, rings, and wrist pin for a complete rebuild.
Built For Performance
- Precision machined from high-silicone aluminum alloy for durability
- .040 over bore increases displacement for improved power
- Plasma-moly rings reduce friction and enhance sealing
- Includes wrist pin and circlips for easy installation
Fits These Machines
- for Polaris 300 Xplorer
- for Polaris 300 Xpress
- for Polaris Big Boss
On-The-Job Use
- ATV trail riding and utility work
- Engine rebuilds and top-end overhauls
- Restoring compression on high-mileage engines
Specs At A Glance
| Bore Size | 75.5mm |
| Overbore | .040 |
Good To Know
Q: Does this kit include rings? A: Yes, the kit includes piston rings and wrist pin for a complete installation.
Q: Is this compatible with stock cylinder? A: The cylinder must be bored to 75.5mm to accommodate this .040 over piston kit.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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