Namura .060 Over Bore Top End Repair Kit fits Polaris 400 2-Stroke ATV's 84.5mm

Namura .060 Over Bore Top End Repair Kit for Polaris

This Namura .060 over bore top end repair kit is a piston assembly for Polaris 400 2-stroke ATVs, sized at 84.5mm to renew worn cylinders.

Overview

The Namura .060 Over Bore Top End Repair Kit is a replacement piston and ring set for Polaris 400 2-stroke ATV engines. This top end repair kit is designed to restore compression and power after cylinder wear, using an 84.5mm bore size. It is a cost-effective solution for rebuilding the top end of a Polaris ATV.

Built For Performance

• Includes piston, piston rings, and wrist pin for a complete top-end overhaul
• 0.060 over bore size allows for machining of worn cylinders
• Precision-cast from durable aluminum alloy
• Engineered to meet or exceed OEM specifications
• Designed specifically for Polaris 400 2-stroke engines

Fits These Machines

• for Polaris 400 2-Stroke ATV

On-The-Job Use

• Trail riding and recreational ATV use
• Utility work on farms and ranches
• Dune riding and off-road exploration
• Engine rebuild for restoring performance

Specs At A Glance

Good To Know

Q: Does this kit include a cylinder? A: This top end repair kit includes the piston, rings, and wrist pin. The cylinder is not included and must be re-bored or replaced separately.

Q: Is this kit suitable for a stock Polaris 400 engine? A: Yes, this kit is designed for a .060 over bore application, which requires cylinder machining. It is intended for engines that need a bore increase due to wear.

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