2 SPI Standard Bore Piston Kits for Yamaha Exciter 570 / II EX570 1987-1993 73mm

2 SPI Standard Bore Piston Kits for Yamaha

This set of two standard bore piston kits, sized 73mm, is designed for use with Yamaha Exciter 570 and EX570 snowmobiles from 1987 to 1993.

Overview

These SPI standard bore piston kits deliver a direct replacement for worn pistons in Yamaha Exciter 570 and EX570 engines. Each kit includes a piston, rings, and wrist pin for a complete top-end rebuild. They restore compression and power for reliable snowmobile performance season after season.

Built For Performance

• Standard bore 73mm diameter for factory-spec fitment
• Includes piston, rings, and wrist pin per kit
• High-strength aluminum alloy construction for durability
• Precision-machined ring grooves ensure proper sealing
• Two kits included for a full twin-cylinder rebuild

Fits These Machines

• for Yamaha Exciter 570 (1987-1993)
• for Yamaha Exciter II EX570 (1987-1993)

On-The-Job Use

• Snowmobile trail riding and recreational touring
• High-performance lake running and ice racing
• Engine rebuilds during off-season maintenance
• Backup set for spare parts on long-distance trips

Specs At A Glance

Good To Know

Q: Do these piston kits include the wrist pin bearings? A: Each kit comes with a wrist pin, but you may need to reuse or purchase the wrist pin bearings separately – check your engine's requirements.

Q: Can I use these piston kits for a bore-up or oversize rebuild? A: No, these are standard bore 73mm pistons intended for cylinders that have not been overbored; use oversize pistons if your cylinder has been machined larger.

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