OS 1.00 piston ring kit for the TRX 500 Foreman four-stroke ATV family, covering FA, FE, FM, FPE, and FPM model lines from 2005 through 2019. This aftermarket replacement restores compression and piston sealing, bringing back steady power and fuel-efficient combustion on rugged trails and long workdays. Built to match the original bore dynamics, the OS 1.00 rings resist wear and oil blow-by, delivering reliable seal under load. A cost-effective alternative to OEM bundles, designed for field use and dependable long-term performance. Wear and tear on the top end can creep up gradually, with ring tension loss, bore wear, and increasing oil consumption that fades power on steep climbs or heavy loads. This OS 1.00 piston ring kit is engineered to reestablish a precise seal and restore consistent combustion, so you can trust your foreman to perform when it matters most. It’s designed for rugged use in the field and on the trail, delivering reliable return-to-power without the premium OEM price.

Comprehensive Vehicle Fitment

Manufacturer	Models / Series	Years / Details
Honda	TRX 500 Foreman FA	2005-2019
Honda	TRX 500 Foreman FE	2005-2019
Honda	TRX 500 Foreman FM	2005-2019
Honda	TRX 500 Foreman FPE	2005-2013
Honda	TRX 500 Foreman FPM	2005-2013

Product Specifications

Attribute	Details
OEM Reference Part Numbers	13014-HP0-A01
Type	Piston Ring Set
Manufacturer	Aftermarket Replacement
Application	Honda TRX 500 Foreman (FA/FE/FM/FPE/FPM) 2005-2019
Material	Piston rings manufactured for high wear resistance (cast iron common in aftermarket sets)
Bore Size	OS 1.00 / Standard bore 92.00 mm (3.622")
Oversize	OS 1.00
Ring Count	5 rings included
Packaging	1 kit per box

OEM & Aftermarket Cross-Reference Information

Part Number	Brand / Type	Cross-Reference Notes
13014-HP0-A01	Honda OEM	OEM TRX 500 Foreman piston ring set cross-reference for 2005-2019 models.
13010-HP0-A01	Aftermarket Replacement	Common aftermarket cross-reference for TRX 500 Foreman ring sets; associated with OS 1.00 bore sizing.

What's Included

Here's what you get in the box — a ready-to-install kit designed to refresh the TRX 500 Foreman's top end. It includes:

• 5 x Piston Rings — OS 1.00 oversize, designed for a 92.00 mm standard bore

Note: This kit is rings-only. Piston, wrist pin, circlips, and gaskets are not included.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility — engineered to match the TRX 500 Foreman engines across FA/FE/FM/FPE/FPM years 2005-2019 for a straightforward top-end rebuild.
• OEM Cross-Reference — aligns with Honda’s OEM part references to simplify replacement guidance and future maintenance planning.
• Premium Materials — made for durable wear resistance in four-stroke engine top ends, built to endure trail and farm use.
• OS 1.00 Oversize Restoration — restore compression after bore wear or ring land fatigue without paying OEM-price premiums.
• Cost-Effective Performance — delivers reliable engine sealing and power restoration without the OEM cost delta.
• Engine-Build Confidence — a fit-for-purpose kit with tested seating characteristics to support reliable break-in and long-term use.

Installation Notes:

• Inspect the cylinder bore for scoring, scuffing, or core damage; bore reconditioning may be required before installation.
• Verify ring end gaps on the piston and bore; adjust per the engine’s service manual recommendations to ensure proper sealing.
• Clean all bore grooves and piston lands thoroughly; remove all debris and oil residues before ring installation.
• Orient each ring correctly (top rings vs. second rings) and use a proper ring expander to avoid bending or nicking edges.
• Lightly oil the rings and piston skirts before installation to reduce initial seating wear and promote even seating during first start.
• Install with even, stepped seating during the break-in period; avoid high RPM loads until rings have properly seated to the bore.

Why Upgrade?

Running a worn piston ring set in this engine can lead to gradual compression loss, increased oil consumption, and power fade under load. Replacing with this OS 1.00 piston ring kit restores compression, reduces blow-by, and brings back reliable power and efficiency for long days on the trail or in the field. This upgrade helps ensure consistent combustion sealing and predictable performance after a top-end refresh.