This STD bore piston ring kit is designed specifically for Honda TRX500 Foreman 500 applications, covering FA, FE, FM, FPE, and FPM variants produced between 2005 and 2019. It targets the 92 mm bore and is built to restore compression, curb oil blow-by, and refresh idle and power for rugged trail riding or demanding farm work. The kit provides a reliable sealing package without the OEM sticker price, making top-end service more affordable and straightforward.

Engineered for real-world wear, this aftermarket replacement tackles common Foreman issues like compression loss, rising oil consumption, and reduced throttle response. It delivers a complete, ready-to-install ring set that reinstates the engine’s original sealing integrity, offering dependable performance on remote trails or busy workdays without excessive downtime.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit arrives as a complete ring set for the 92.00 mm STD bore.

• Ring Set for 92.00 mm STD bore

Note: Piston, cylinder block, gaskets, wrist pin, and circlips are not included unless the product page specifies a full top-end assembly.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Engineered to match OEM geometry for the TRX500 Foreman 500, ensuring straightforward installation.
• OEM Cross-Reference: Uses the established 13010-HP0-A01 reference to align with Honda's original specifications.
• Premium Materials & Build: Designed to withstand the wear of 499–500cc four-stroke engines in demanding trail and farm use.
• Performance Restoration: Restores compression sealing and reduces oil blow-by, returning throttle response and power.
• Cost-Effective Maintenance: High-quality alternative to OEM parts without the OEM price tag.
• Reliability in Harsh Environments: Built to endure dust, mud, and heavy workloads typical of outdoor work and adventure riding.

Installation Notes:

• Verify bore and standard size: Confirm a 92.00 mm STD bore before installation and ensure the kit matches the engine version (FA/FE/FM/FPE/FPM).
• Clean and prep: Thoroughly clean cylinder walls and ring grooves; remove carbon buildup to ensure proper ring seating.
• Lubrication during assembly: Apply clean engine assembly oil to rings and cylinder walls to prevent dry start.
• Ring orientation and placement: Install compression rings in their correct position and orientation; stagger ring gaps if required by service data.
• End-gap and seating checks: Check ring end-gap clearance if you have OEM specs; ensure rings seat evenly without binding.
• Reassembly best practices: Reassemble with correct torque for any accompanying fasteners and replace related gaskets if performing a full top-end service.

Why Upgrade?

Running a worn piston ring kit can allow compression loss and oil blow-by to steadily degrade engine performance, throttle response, and fuel efficiency. This replacement restores sealing integrity, reduces oil consumption, and brings back reliable power and idle stability for dependable trail or farm operation.