Namura Standard Bore Top End Repair Kit for Polaris 400 2-Stroke ATV's 83mm

Standard Bore Top End Repair Kit for Polaris

This standard bore top end repair kit provides a complete overhaul for Polaris 400 2-stroke ATV engines, including cylinder, piston, rings, gaskets, and wrist pin (83mm bore).

Overview

This standard bore top end repair kit is designed for Polaris 400 2-stroke ATVs, delivering all necessary components for a top end rebuild. The 83mm bore kit ensures a precise fit for the Polaris 400 engine, restoring power and reliability. Ideal for ATV owners maintaining their 2-stroke machines.

Built For Performance

• Includes cylinder, piston, rings, gaskets, and wrist pin
• Cast piston with durable ring set
• Precision-machined cylinder bore
• Complete gasket set included
• Designed for standard bore (83mm) Polaris 400 engines

Fits These Machines

• for Polaris 400 2-Stroke ATVs

On-The-Job Use

• Engine rebuilds after wear or seizure
• Trail riding and light off-road use
• Restoration of vintage Polaris ATVs

Specs At A Glance

Good To Know

Q: Does this kit include the cylinder? A: Yes, the top end repair kit includes a new cylinder along with piston, rings, gaskets, and wrist pin for a complete rebuild.

Q: Can I use this on a Polaris 400 with an aftermarket cylinder? A: This kit is designed for standard bore fitment; if your engine has been bored oversize, this kit will not fit. Always verify current bore size before purchase.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.