Namura Big Bore Top End Gasket Kit for Honda XR400R fits 1996-2004 440cc 89mm

Big Bore Top End Gasket Kit for Honda

This big bore top end gasket kit contains all necessary gaskets and seals to upgrade a Honda XR400R to 440cc with an 89mm bore, providing a reliable top end rebuild for off-road use.

Overview

This big bore top end gasket kit is designed for the Honda XR400R, allowing an increase from stock displacement to 440cc using an 89mm piston. The kit includes all gaskets needed for a complete top end overhaul, making it ideal for riders looking to boost power and performance. This big bore top end gasket kit ensures a proper seal and long-lasting durability.

Built For Performance

• Includes head gasket, base gasket, and all necessary seals for a complete top end install
• Manufactured from high-quality materials to withstand high compression and heat
• Precise fitment for Honda XR400R 1996-2004 models
• Designed to work with 89mm big bore pistons for 440cc displacement
• Aftermarket replacement that meets or exceeds OEM specifications

Fits These Machines

• for Honda XR400R (1996-2004)

On-The-Job Use

• Trail riding and off-road racing where increased displacement provides more torque
• Engine rebuilds and top end overhauls for dirt bikes
• Competitive enduro and motocross applications
• Restoration projects requiring a big bore upgrade

Specs At A Glance

Good To Know

Q: Will this gasket kit fit a stock Honda XR400R? A: This kit is specifically designed for bikes that have been converted to 440cc with an 89mm big bore piston; it is not for stock displacement engines.

Q: What gaskets are included? A: The kit includes head gasket, base gasket, valve stem seals, and other necessary top end seals.

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