JLO Cuyuna Rockwell 440 cc .020 Piston 2F440/2 LR440/2 for JLO Cuyuna

Piston for JLO, Cuyuna, and Rockwell Engines

This new .020 oversize piston is a replacement engine component for 440 cc JLO, Cuyuna, and Rockwell two-stroke engines, and it cross-references OEM numbers 2F440/2 and LR440/2.

Overview

This piston fits 440 cc JLO, Cuyuna, and Rockwell engines and replaces original pistons that are worn or scored. The .020 oversize bore restores compression on cylinders that have been honed or re-bored to the next size. It suits mechanics rebuilding vintage snowmobile and small engine powerplants for these brands.

Built For Performance

• .020 inch oversize diameter for honed or re-bored cylinders
• Cross-references OEM numbers 2F440/2 and LR440/2
• New component, not a used take-off
• Fits 440 cc JLO, Cuyuna, and Rockwell engine families
• Intended for two-stroke engine rebuilds

Fits These Machines

• for JLO 440 cc engines calling for 2F440/2
• for Cuyuna 440 cc engines calling for LR440/2
• for Rockwell 440 cc engines calling for 2F440/2 or LR440/2

On-The-Job Use

• Top-end rebuilds on vintage 440 cc two-stroke engines
• Replacing scored or worn pistons after cylinder honing
• Restoring compression on re-bored cylinders
• Shop and garage engine repair work

Specs At A Glance

Good To Know

Q: Does this piston need a matching ring? A: Pistons are normally matched with rings sized for the same .020 oversize bore. Confirm your ring size before assembly.

Q: Is the bore size correct for my engine? A: This is a .020 oversize piston, so the cylinder must be honed or re-bored to that size. Measure the bore before ordering.

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