Restore engine compression and curb oil consumption with a piston ring kit designed for Honda TRX 300 ATVs produced from 1988 through 2000. This kit targets the 282cc single‑cylinder, air‑cooled powerplant found in the TRX 300 FourTrax family, covering both two‑wheel and four‑wheel drive variants. Expect noticeably crisper throttle response, smoother acceleration, and improved fuel economy after a proper rebuild with exact bore and ring‑profile matched parts.

This aftermarket piston ring kit is built to address common wear that robs performance on older TRX 300 engines, including ring groove erosion and cylinder scoring that lead to poor sealing and increased blow‑by. With a robust, durable design, it provides reliable sealing and durable oil control for trail riding or farm work, all at a price point that makes engine rebuilds practical rather than optional. The combination of high‑strength cast iron and chrome‑plated top rings delivers wear resistance and consistent sealing under off‑road conditions.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This piston ring kit comes as a complete set for a single piston rebuild.

• Two compression rings
• One oil control ring

Note: Piston, wrist pin, circlips, gaskets, and other related components are not included.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely matched to the Honda TRX 300 bore and ring profile for reliable sealing and easy installation on 1988–2000 models.
• OEM Cross-Reference: Strong cross‑references to Honda OEM parts ensure compatibility with factory specifications while saving on cost.
• Premium Materials: High‑strength cast iron with a chrome‑plated top ring delivers durability and oil‑control performance under off‑road conditions.
• Performance Restoration: Restores compression and minimizes blow‑by, returning power and efficiency lost to wear.
• Cost‑Effective Alternative: Durable aftermarket solution that meets or exceeds OEM‑level sealing at a lower price point.
• Reliability in Tough Conditions: Built for trail riding and farm work where dust, heat, and demanding duty cycles accelerate wear.

Installation Notes:

• Surface prep: Thoroughly clean the cylinder bore and piston grooves; hone or measure bore to ensure it remains within standard spec before ring seating.
• End gaps: Set ring end gaps to 0.25–0.40 mm and stagger gaps across the circumference to minimize blow‑by.
• Lubrication: Apply assembly lube or clean engine oil to rings and bores during installation to prevent dry startup.
• Ring orientation: Install compression rings with correct orientation; misoriented rings can cause sealing loss and uneven compression.
• Torque and seating: If applicable, follow service manual guidelines for piston's end‑clearance and ensure proper seating of rings during first startup.
• Post‑install check: After initial startup, recheck compression and perform a gentle break‑in period per engine rebuild best practices.

Why Upgrade?

Worn piston rings allow blow‑by to contaminate the intake and exhaust systems, reducing compression and accelerating oil consumption. Replacing with this kit revives sealing and compression, restoring reliable power delivery and engine efficiency for tough off‑road work and extended trail riding.