Restore peak compression and curb oil consumption with this OS 0.75 Piston Ring Kit. Engineered for the 450cc four-stroke platforms used in the Kodiak and Rhino family from 2003 through 2014, this kit replaces worn rings to revive throttle response, compression, and overall reliability. The OS 0.75 oversize rings deliver a precise bore seal and reduced ring-end gaps, helping restore power without paying OEM prices.

Designed to tackle common wear on high-mileage engines—like ring recession, increased blow-by, and oil burning that can foul plugs and blue-smoke—the aftermarket kit provides a dependable, trail- and farm-ready solution. It’s built to endure dirt, dust, and demanding use, offering a reliable path back to smooth operation and consistent compression in rugged environments.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

Inside the box you’ll find a complete ring set for the YFM450 OS 0.75 kit:

• Top compression ring
• Second compression ring
• Oil ring

Note: Piston, wrist pin, circlips, and any other related components are not included in this kit.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely engineered for the 2003–2014 Kodiak and Rhino platforms, ensuring correct groove seating and sealing.
• OEM Cross-Reference: Aligns with the OEM reference 5ND-11607-00-00 for reliable cross-compatibility with dealer catalogs.
• Premium Materials & Construction: High-quality ring set designed to withstand the heat and friction of a four-stroke 450cc engine.
• Accurate Oversize for Seal Integrity: OS 0.75 provides proper bore sealing without creating overly tight or uneven gaps that cause blow-by.
• Performance Restoration: Restores compression, reduces oil consumption, and improves throttle response and power delivery.
• Trail- and Farm-Ready Durability: Built to endure dirt, dust, and heavy-duty use typical of work and recreational environments.

Installation Notes:

• Use a proper ring compressor and lubricate the rings with clean engine oil before installation.
• Inspect the cylinder bore for wear and measure to ensure it remains within the OEM range before installing OS rings.
• Install rings with correct orientation; align gap positions to avoid concurrent gaps that can lead to blow-by.
• Clean all debris from the piston grooves and ring lands prior to seating the rings.
• Do not force rings into place; verify that each ring sits flat and evenly seated in its groove.
• After installation, perform a careful hand-turn of the engine to ensure smooth operation before starting the bike.

Why Upgrade?

Running a worn piston-ring set in a high-mileage 450cc engine invites rising oil consumption, reduced compression, and diminishing power. Replacing with the OS 0.75 kit restores sealing pressure and compression, delivering reliable throttle response and extended engine life in demanding trail or farm conditions.