Namura .020 Over Piston Kit for Polaris 325 Magnum Trail Boss Xpedition 78.5mm
Namura .020 Over Piston Kit for Polaris 325 Magnum Trail Boss Xpedition 78.5mm
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.020 Over Piston Kit for Polaris
This .020 over piston kit with 78.5mm bore diameter replaces the original piston in Polaris ATV engines, restoring compression and power for models like the 325 Magnum, Trail Boss, and Xpedition.
Overview
The Namura .020 Over Piston Kit for Polaris 325 Magnum, Trail Boss, and Xpedition provides an oversize piston for engines needing an extra 0.020-inch bore. This piston kit includes rings, wrist pin, and clips for a complete top-end rebuild, delivering consistent performance and reliability.
Built For Performance
- Hypereutectic aluminum alloy casting for strength and heat dissipation
- Precision-machined ring grooves for optimal seal
- Moly-coated rings reduce friction and wear
- Includes wrist pin and circlips for hassle-free installation
- Balanced and weight-matched to OEM specifications
Fits These Machines
- for Polaris Magnum 325
- for Polaris Trail Boss
- for Polaris Xpedition
On-The-Job Use
- Trail riding and utility work
- Engine overhauls and top-end rebuilds
- General ATV maintenance and performance restoration
- Aggressive off-road riding requiring reliable piston performance
Specs At A Glance
| Bore Size | 78.5mm |
| Oversize | .020 (0.020 inch) |
Good To Know
Q: Does this piston kit include the piston rings? A: Yes, the kit includes high-quality moly-coated rings pre-gapped for the specified oversize.
Q: Is this piston kit compatible with the original cylinder? A: It requires the cylinder to be bored to 78.5mm by a qualified machinist to ensure proper clearance.
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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