For HiSun 500 HS YS MASSIMO MSU BENNCHE Cylinder Piston Top End Kit 500cc 84.5mm

Cylinder Piston Top End Kit for HiSun 500

This 84.5mm cylinder piston top end kit for HiSun 500 restores compression on 500cc HS, YS, Massimo, MSU, and Bennche engines with a fresh piston, rings, cylinder, and gasket set.

Overview

This top end kit for HiSun 500 brings a 500cc engine back to life after wear, overheating, or a failed piston. Each 84.5mm cylinder piston top end kit for HiSun 500 includes the piston, rings, pin, clips, cylinder, and gaskets needed for a complete rebuild. Ideal for riders and shops servicing HS, YS, Massimo, MSU, and Bennche machines.

Built For Performance

• 84.5mm bore matches the original 500cc cylinder displacement
• Piston and ring set sized for a true 500cc cylinder bore
• Cylinder casting built for consistent wall thickness and cooling
• Gasket set included to seal the top end on reassembly
• Wrist pin and clips supplied for a complete install

Fits These Machines

• for HiSun 500 HS
• for HiSun 500 YS
• for Massimo MSU 500
• for Bennche 500

On-The-Job Use

• Top end rebuilds after low compression or oil burning
• Routine engine refresh on high-hour ATV and UTV units
• Repair shop rebuilds on 500cc utility machines
• Trail and farm use where dependable compression matters

Specs At A Glance

Good To Know

Q: Why is the bore size important? A: The piston and rings must match the cylinder bore, and this kit is built at 84.5mm to suit 500cc engines. Confirm your existing bore before ordering.

Q: Is this an original brand part? A: No, this is an aftermarket top end kit made for the listed machines. Verify your model and displacement before purchase.

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