2 SPI Piston Kits for 1978-1984 Moto-Ski Futura & Sonic L/C Standard Bore 69.5mm

SPI Piston Kits for Moto-Ski Futura & Sonic L/C (1978-1984)

These SPI piston kits replace OEM pistons for 1978-1984 Moto-Ski Futura and Sonic L/C snowmobiles with standard bore 69.5mm, providing reliable engine rebuild components.

Overview

These piston kits are aftermarket replacements designed for Moto-Ski Futura and Sonic L/C models. Each piston kit includes a piston, rings, and wrist pin for a standard bore of 69.5mm. Ideal for restoring compression and performance in 1978-1984 Moto-Ski snowmobiles.

Built For Performance

• Made from high-strength aluminum alloy for durability
• Precision-machined to exact standard bore dimensions (69.5mm)
• Includes premium piston rings for consistent compression
• Includes wrist pin and circlips for complete installation
• Designed to match OEM specifications for reliable fit

Fits These Machines

• for Moto-Ski Futura (1978-1984)
• for Moto-Ski Sonic L/C (1978-1984)

On-The-Job Use

• Engine rebuild for 1978-1984 Moto-Ski snowmobiles
• Top-end overhaul to restore compression
• Replacing worn pistons in high-mileage sleds

Specs At A Glance

Good To Know

Q: What is the bore size of these pistons? A: These pistons have a standard bore of 69.5mm, suitable for stock cylinders of 1978-1984 Moto-Ski Futura and Sonic L/C snowmobiles.

Q: Are these piston kits complete? A: Yes, each kit includes piston, rings, wrist pin, and circlips for a full top-end rebuild.

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