Namura .020 Over Bore Top End Rebuild Kit for Honda Rancher 400 2004-2007 85.5mm

Namura .020 Over Bore Top End Rebuild Kit 85.5mm for Honda

This top end rebuild kit provides all necessary components to restore compression and performance in Honda Rancher 400 ATVs from 2004-2007 with a .020 over bore and 85.5mm piston size.

Overview

This Namura .020 over bore top end rebuild kit is designed to refresh the cylinder and piston assembly on Honda Rancher 400 engines. The kit includes a piston, rings, wrist pin, circlips, and gaskets needed for a complete top end overhaul. Ideal for restoring lost power and reliability in 2004-2007 models.

Built For Performance

• Precision-machined 85.5mm piston for accurate fit
• .020 over bore configuration for worn cylinder bores
• Complete gasket set included for a leak-free seal
• Durable piston rings ensure long service life
• Wrist pin and circlips provided for secure assembly
• Engineered to match OEM specifications for Honda

Fits These Machines

• for Honda Rancher 400 (2004-2007)

On-The-Job Use

• Restoring top end compression on high-mileage ATVs
• Preparing machine for trail riding or utility work
• Rebuilding engine after a seizure or loss of power
• Completing a full top end refresh during seasonal maintenance

Specs At A Glance

Good To Know

Q: Does this kit include a cylinder? A: No, this is a top end rebuild kit that includes piston, rings, wrist pin, circlips, and gaskets; the cylinder is not included.

Q: Is this kit compatible with the original Honda cylinder? A: Yes, it is designed to fit a standard bore cylinder that has been machined .020 oversize; confirm your cylinder bore condition 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.