Namura Standard Bore Size B Top End Kit for Polaris Sportsman 850 Scrambler 87mm

Namura Standard Bore Size B Top End Kit for Polaris Sportsman 850 Scrambler 87mm

This top end kit is a complete cylinder and piston assembly for Polaris Sportsman 850 and Scrambler 850 engines, with a standard bore size of 87mm (Size B).

Overview

This top end kit from Namura provides all necessary components for rebuilding the top end of your Polaris Sportsman 850 or Scrambler 850 engine. It includes a cylinder, piston, rings, wrist pin, clips, and gaskets machined to standard 87mm bore specifications. Restore factory compression and performance with this reliable kit.

Built For Performance

• Precision-machined cylinder matches OEM bore dimensions
• High-quality piston rings ensure proper sealing
• Complete gasket set prevents oil and compression leaks
• Includes wrist pin and clips for easy assembly
• Standard bore design for direct replacement of worn components

Fits These Machines

• for Polaris Sportsman 850
• for Polaris Scrambler 850

On-The-Job Use

• Trail riding and recreational off-road use
• Utility and farm work requiring reliable power
• Engine rebuilds after high mileage or overheating
• Restoring compression and performance in worn engines

Specs At A Glance

Good To Know

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

Q: Can I use this kit if my cylinder is slightly scored? A: This kit is intended for standard bore applications; if your cylinder is scored, you may need an overbore kit or cylinder repair.

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