Restore peak compression and flawless oil control on your Honda TRX 350 four-stroke with this OS 0.75 piston ring kit. Designed for TRX 350 FM, TM, FE and TE models manufactured from 2000 through 2006, this aftermarket replacement brings engine performance back to near OEM levels by renewing the crucial piston-to-cylinder seal. If you’re chasing smoother idle, better throttle response, and reliable power on tough trails or farm duty, this OS 0.75 ring kit is built to deliver.

This aftermarket replacement focuses on delivering a precise restoration where wear takes its toll—lost compression, increased blow-by, and rising oil consumption. By renewing the compression rings and oil ring with exacting tolerances, it offers dependable sealing, improved burning efficiency, and consistent power delivery. It’s a reliable choice for riders and rural workers who need a cost-effective, readily available solution that keeps their TRX 350 engine performing under demanding conditions.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit is designed to replace the piston rings for the TRX 350 OS 0.75 build. The box includes:

• 2 x Compression Rings
• 1 x Oil Ring

Note: Piston, piston pin, and circlips are not included. See packaging or your supplier for a full top-end rebuild kit if those components are required.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Engineered to install on Honda TRX 350 FM/TM/FE/TE models from 2000–2006 without modification.
• OEM Cross-Reference Alignment: Matches Honda OEM references 13013-HN5-671/672 to ensure correct sealing geometry and fit.
• Premium Materials (for this part type): Cast iron rings with precision finish for durable sealing and consistent wear resistance.
• Performance Restoration: Restores compression and oil control, reducing blow-by and restoring steady power output under load.
• Cost-Effective Alternative: Provides reliable, factory-tolerant performance at a value-conscious price point.
• Supply Stability: Backed by ongoing aftermarket availability to keep maintenance schedules on track.

Installation Notes:

• Inspect bore and rings before installation: Check cylinder bore for wear and scoring; ensure ring grooves are clean and free of debris.
• Proper ring orientation: Install compression rings with correct orientation marks; stagger end gaps to minimize blow-by pathways.
• Lubricate generously: Apply clean engine oil to rings and piston skirts during installation to reduce initial seating wear.
• Check end gaps: For oversize rings, verify end-gap specs per OEM guidance and adjust if necessary with the appropriate oversize set.
• Avoid ring twist: Use a proper ring expander to avoid nicking or bending rings during installation.
• Clean assembly area: Wipe down all components and ensure no metal shavings or debris remain in the cylinder or crankcase before final assembly.

Why Upgrade?

Running a worn piston ring set in the TRX 350 can lead to reduced compression, higher oil consumption, and increased blow-by, which degrade power and overall reliability. Upgrading to this OS 0.75 piston ring kit restores sealing performance and consistency, helping the engine perform predictably on demanding trails or farm tasks and extending service life between major overhauls.