TRX400EX Big Bore Cylinder Piston Gasket Kit for Honda 1999-2008 89mm 440cc

Product Overview

This aftermarket replacement top end rebuild kit is intended for Honda TRX400EX applications from 1999 through 2008 and includes a big bore cylinder, piston, and gasket set with an 89mm bore and 440cc displacement. A top end kit of this type is used when servicing the cylinder, piston, and gasket components of a four-stroke ATV engine. The listed components are supplied for comparison with the corresponding Honda TRX400EX reference applications.

Key Features & Performance

• Includes a big bore cylinder, piston, and gasket kit for the listed Honda TRX400EX applications
• 89mm bore sizing provides a 440cc displacement for the top end assembly
• Gasket kit supports reassembly of the cylinder and head surfaces
• Applicable to top end rebuild or refresh work on the listed 1999 to 2008 models

Fitment & Compatibility

• for Honda TRX400EX 1999 applications
• for Honda TRX400EX 2000 applications
• for Honda TRX400EX 2001 applications
• for Honda TRX400EX 2002 applications
• for Honda TRX400EX 2003 applications
• for Honda TRX400EX 2004 applications
• for Honda TRX400EX 2005 applications
• for Honda TRX400EX 2006 applications
• for Honda TRX400EX 2007 applications
• for Honda TRX400EX 2008 applications

Common Uses

• Replacing a worn, damaged, or out-of-spec cylinder, piston, or gasket set on a Honda TRX400EX
• Top end refresh during engine service on the listed 1999 to 2008 models
• Restoring cylinder and piston function after the original components have failed

Technical Specifications

• Product Type: Big Bore Cylinder, Piston, and Gasket Kit
• Bore Size: 89mm
• Displacement: 440cc
• Model Application(s): Honda TRX400EX 1999-2008

Frequently Asked Questions

Q: What does a top end cylinder and piston kit do on an ATV engine? A: It provides the cylinder, piston, and gasket components used to seal and complete the combustion chamber at the top of a four-stroke engine so the engine can build compression and run normally.

Q: How can fitment be verified for this kit? A: Compare the existing cylinder and piston part numbers and the complete ATV model designation against the information listed in the title before ordering, since fitment can vary by model year and configuration.

This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.