Restore compression and curb oil consumption with an oversize piston ring kit designed for the TRX 250 EX and Recon models. The OS 0.75 configuration is tailored to the 68.50 mm bore, delivering solid sealing and durable wear resistance to revitalize performance for trail rides or farm work. Expect improved throttle response, reduced blow-by under heavy loads, and a rebuild-ready seal that meets or exceeds OEM specifications. This kit is a value-focused rebuild option that helps bring tired top-end performance back to life.

Designed to address bore wear and ring-land degradation, this aftermarket replacement targets common symptoms like compression loss, power sag, and oil consumption while staying reliable in rugged conditions. The OS 0.75 rings provide a precise oversize fit that restores sealing without the cost of a full bore job, making it a dependable choice for riders who tackle muddy trails, heat, and heavy payloads.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit includes everything you need for a proper piston-ring end-to-end replacement. It includes:

• Piston Rings – Top compression ring
• Piston Ring – Second compression ring
• Oil Ring – Oil control ring

Note: Gaskets, pistons, wrist pins, circlips, and other related components are not included in this kit.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely sized OS 0.75 kit for TRX 250 Recon/EX platforms to restore seal without extensive modification.
• OEM Cross-Reference: Aligns with Honda part numbers 13041-HM8-003 and 13011-HM8-003 for reliable fitment reference.
• Premium Materials: High-grade cast iron with a chrome-faced top ring for durable sealing and wear resistance.
• Exact Oversize Fit: OS 0.75 configuration tailored to bore wear in TRX 250 engines, helping reclaim compression without premature bore replacement.
• Performance Restoration: Reclaims compression, reduces oil blow-by, and restores predictable power under load.
• Value-Focused Rebuild: A cost-effective option that breathes new life into rugged engines used on trails and in demanding farm work.

Installation Notes:

• Measure the bore with a calibrated bore gauge to confirm std vs. oversize needs before installing the OS 0.75 rings.
• Clean all ring grooves thoroughly; remove any carbon or debris that could prevent proper seating.
• Install the top ring with the beveled side facing the direction of rotation as per the OEM-style orientation; stagger end gaps by at least 120 degrees between rings.
• Apply a light film of assembly lubricant to the rings and piston skirts to aid seating during initial startup.
• Inspect ring end gaps after installation and ensure they fall within OEM tolerances for lightly worn bores.
• Ensure the oil-ring louvers and gaps align with the crankcase oil passages; verify proper seating of the oil-control ring to maintain oil control.
• Gaskets and related components are not included; use your existing gaskets or source OEM-style base and head gaskets separately for a proper seal.

Why Upgrade?

Running a worn piston-ring set can allow blow-by, leading to reduced compression, power loss, and higher oil consumption. Upgrading to this OS 0.75 piston-ring kit restores sealing effectiveness and durability, delivering repeatable performance in demanding conditions and helping prevent more costly engine damage down the line.