Namura .060 Over Bore Top End Rebuild Kit for Honda XR400R 1996-2004 86.5mm

Namura .060 Over Bore Top End Rebuild Kit for Honda XR400R

This .060 over bore top end rebuild kit for the Honda XR400R includes a piston, rings, and gaskets to restore engine performance for 1996-2004 models, with an 86.5mm bore size.

Overview

The Namura .060 over bore top end rebuild kit is designed for the Honda XR400R to increase displacement and refresh worn cylinders. This top end rebuild kit uses an 86.5mm bore size and .060 over specification to provide a precise fit after boring. It is ideal for off-road riders rebuilding their XR400R engine for reliable power delivery.

Built For Performance

• Includes piston, rings, wrist pin, circlips, and complete gasket set
• Machined from forged aluminum for strength
• .060 over bore size compensates for cylinder wear
• Designed for high-revving XR400R engine
• Coated piston skirt reduces friction
• Direct replacement for Honda XR400R 1996-2004

Fits These Machines

• for Honda XR400R 1996-2004

On-The-Job Use

• Rebuilding a top end for off-road trail riding
• Increasing engine displacement with a .060 over bore
• Replacing worn rings and piston in a high-mileage XR400R
• Restoring compression for better starting and throttle response
• Preparing a dual-sport XR400R for adventure riding

Specs At A Glance

Good To Know

Q: Is this kit suitable for a Honda XR400R with stock cylinder? A: The cylinder must be bored to .060 over to match this piston; do not install in an unmodified cylinder.

Q: Does the kit include head gasket? A: Yes, the top end rebuild kit includes a complete gasket set for the cylinder head and base.

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