420924519 Reed Valve Assembly for Ski-Doo MXZ 550 TNT 2010-2012

Reed Valve Assembly for Ski-Doo

This reed valve assembly for Ski-Doo controls intake airflow into the engine crankcase and carries OEM cross-reference 420924519 for easy matching.

Overview

This reed valve assembly for Ski-Doo is a direct-fit intake component that regulates the air and fuel charge entering the crankcase on 550-series snowmobile engines. It replaces the factory reed cage and petals so the engine breathes correctly through the full throttle range. Riders servicing a Ski-Doo MXZ 550 TNT will find this reed valve assembly for Ski-Doo a practical replacement for worn or cracked originals.

Built For Performance

• Constructed to match the OEM 420924519 fitment and mounting pattern
• Reed petals seal against the cage for consistent intake control
• Designed to handle the vibration and temperature swings of two-stroke operation
• Lightweight assembly that installs in the stock intake location
• Compatible with factory intake boots and manifold on listed models

Fits These Machines

• for Ski-Doo MXZ 550 TNT 2010
• for Ski-Doo MXZ 550 TNT 2011
• for Ski-Doo MXZ 550 TNT 2012

On-The-Job Use

• Trail riding and groomed path touring
• Seasonal maintenance and top-end rebuilds
• Restoring proper idle and throttle response on high-mileage engines
• Replacing cracked or chipped reed petals after a lean-running event

Specs At A Glance

Good To Know

Q: How do I know if my reed valve needs replacing? A: Hard starting, poor idle, or a loss of low-end power often point to worn or cracked reed petals. Inspect the assembly for chips, gaps, or warping before ordering.

Q: Does this assembly include gaskets? A: Check the listing contents before ordering, since gasket inclusion varies. Reusing old gaskets is not advised because intake leaks can affect running.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.