2 Sets SPI Standard Bore Piston Rings for Polaris 800 most 2000-2005 Twins 85mm

2 Sets SPI Standard Bore Piston Rings for Polaris 800 Twins 85mm

These 2 sets of SPI standard bore piston rings are designed for Polaris 800 twin-cylinder engines from 2000-2005 with an 85mm bore size.

Overview

These 2 sets SPI standard bore piston rings are a direct replacement for Polaris 800 twin engines manufactured between 2000 and 2005. The rings seal the combustion chamber to maximize compression and reduce oil consumption. Installing these 2 sets of piston rings helps restore engine performance in older Polaris twins.

Built For Performance

• Manufactured from high‑ductile iron for durability
• Standard bore size 85mm with proper ring gap
• Includes top and second rings for each cylinder
• Designed for use with SPI pistons or OEM equivalents
• Reduces blow‑by and oil consumption

Fits These Machines

• for Polaris 800 Twin (2000-2005) with 85mm bore

On-The-Job Use

• Engine rebuild or top‑end overhaul
• Snowmobile engine restoration
• ATV performance restoration
• Dyno tuning and racing preparation

Specs At A Glance

Good To Know

Q: Do I need to file the ring gaps before installation? A: Always measure and adjust ring end gaps according to the engine manufacturer’s specifications. These rings may require slight filing to achieve the correct gap.

Q: Are these rings compatible with Nikasil‑coated cylinders? A: Yes, they are suitable for use in Nikasil, steel, or iron cylinder bores provided the bore is within tolerance and properly honed.

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