420924519 Reed Valve Assembly for Ski-Doo Grand Touring 550 2003-2015

Reed Valve Assembly for Ski-Doo Grand Touring 550

This reed valve assembly is a direct replacement intake component for 2003 through 2015 Ski-Doo Grand Touring 550 snowmobiles, carrying OEM cross-reference 420924519.

Overview

The reed valve assembly regulates the air and fuel charge entering the crankcase of a two-stroke engine, sealing on the return pulse and opening on intake vacuum to keep combustion consistent. This replacement reed valve assembly brings back steady idle and sharp throttle pickup when original petals wear, chip, or fail to seal. It suits owners of a Ski-Doo Grand Touring 550 who want a dependable intake part keyed to the correct number.

Built For Performance

• Cross-referenced to OEM part number 420924519 for straightforward sourcing
• Reed petals flex-controlled to seal hard on compression and open fully on intake
• Mounting cage machined to the factory bolt pattern for a no-modification fit
• Supplied as a complete assembly to simplify service work
• Built to handle the intake cycles of the 550cc two-stroke engine

Fits These Machines

• for Ski-Doo Grand Touring 550, model years 2003 to 2015

On-The-Job Use

• Replacing tired reed petals found during routine engine teardown
• Fixing rough idle or hesitation caused by poor reed sealing
• Intake service on a long-running trail and touring sled

Specs At A Glance

Good To Know

Q: Can a worn reed valve assembly cause hard starting? A: Yes, petals that no longer seal allow the intake charge to escape, which often shows up as hard starting and a weak low-end pull. Q: Is it worth checking the whole intake tract at the same time? A: Inspect the boots, gaskets, and airbox connection for cracks or leaks while the assembly is off, since any air leak will affect how the new reed valve assembly performs.

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