Restore peak compression and oil control on your Honda TRX450 Foreman with this OS 0.75 piston ring kit. Engineered specifically for FM/FE models built from 1998 through 2004, it revives top-end sealing and throttle response for demanding trails or long days on the farm. The true oversize 0.75 mm rings fit the bore precisely, delivering reliable compression without paying OEM prices, and are manufactured with Teikoku-grade materials for durable, repeatable performance.

Built to address the wear-and-tear realities of a high-mileage TRX450, this aftermarket kit targets common culprits like worn ring lands, blow-by, and creeping oil consumption. With tight manufacturing tolerances and high-quality Teikoku-grade alloy rings, you’ll restore consistent power and oil separation—whether you’re navigating rough terrain or mowing through a full workday on the farm. It’s a dependable, value-driven choice for riders who demand steady power and easy maintenance.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit includes the essential piston rings required to refresh the top end on your TRX450 Foreman. In the box you’ll find:

• 2 x Compression Rings
• 1 x Oil Control Ring

Note: Piston, wrist pin, circlips, and base/gasket components are not included and must be sourced separately.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely matched OS 0.75 ring set for Honda TRX450 FM/FE Foreman, 1998-2004.
• OEM Cross-Reference: Backed by Honda OEM references 13013-HN0-A01 / 13013-HN0-A02 with reliable aftermarket parity.
• Premium Materials: Teikoku-grade alloy rings deliver durable wear resistance and reliable sealing under tough use.
• Accurate Oversize Restoration: OS 0.75 restores top-end sealing and oil separation for crisp power recovery.
• Performance Restoration: Reclaims compression and throttle response for confident trail or farm operation.
• Cost-Effective: A value-driven alternative to OEM pricing without compromising fit or material quality.

Installation Notes:

• Clean and inspect the piston ring grooves thoroughly before installation to prevent ring binding.
• Lubricate the new rings with a light film of engine oil or assembly lube before fitting into the skirt grooves.
• Install the rings with the markings facing up and avoid mixing top and second rings (the top ring is typically narrower).
• Space the ring end gaps roughly 120 degrees apart to promote even sealing and burn-free combustion.
• Use a proper piston ring expander or a carefully controlled technique to avoid bending or nicking rings during installation.
• For OS kits, verify bore diameter and bevel wear; ensure the bore is within service limits and the oversize fits the piston that accompanies the kit if used together.

Why Upgrade?

Running a worn piston ring set undermines compression, increases blow-by, and accelerates oil consumption, all of which dull throttle response and reduce reliability on rugged trails or long farm days. This OS 0.75 replacement restores top-end sealing and oil management, delivering dependable power and smoother operation when you need it most.