For HONDA TRX400EX 1999-2008 85MM Bore Cylinder Piston Rings Top End Rebuild Kit

85MM Bore Cylinder Piston Rings Top End Rebuild Kit for Honda TRX400EX

This 85MM bore cylinder piston rings top end rebuild kit is built for Honda TRX400EX models from 1999 to 2008, supplying the upper engine components needed to restore compression and reliable running.

Overview

This top end rebuild kit is intended for the Honda TRX400EX from 1999 to 2008 and features an 85MM bore cylinder with matching piston and rings. It gives the engine the core wear parts required for a top end refresh. Owners of Honda TRX400EX machines looking to rebuild with a larger 85MM bore setup will find this kit a direct way to source the main components together.

Built For Performance

• 85MM bore cylinder for the stated displacement
• Piston sized to match the 85MM bore
• Piston rings included for compression sealing
• Kit covers the upper cylinder assembly wear parts
• Intended for the 1999 to 2008 Honda TRX400EX platform

Fits These Machines

• for Honda TRX400EX 1999
• for Honda TRX400EX 2000 to 2008

On-The-Job Use

• Rebuilding a top end after compression loss
• Sport ATV engine refresh on a trail ridden machine
• Shop builds that need an 85MM bore cylinder and piston set
• Replacing worn piston rings and cylinder together

Specs At A Glance

Good To Know

Q: Will this 85MM bore kit fit my stock TRX400EX? A: It is built for the 1999 to 2008 Honda TRX400EX with an 85MM bore, so verify your current bore and model year before ordering. Any required machine work should be confirmed by a technician.

Q: Are piston rings included with the cylinder? A: Yes, the top end rebuild kit pairs the 85MM cylinder and piston with matching rings for proper sealing. Check that the bore matches your engine before installation.

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