420256606 Valve Seat Sleeve for Sea-Doo Speedster 430 1503 2008

Valve Seat Sleeve for Sea-Doo Speedster 430 1503

This valve seat sleeve is a replacement engine component for the Sea-Doo Speedster 430 1503, built to renew the valve sealing surface in the cylinder head and help the engine hold proper compression. It cross-references OEM part number 420256606.

Overview

This valve seat sleeve for Sea-Doo is a precision replacement that presses into the cylinder head to provide a fresh sealing surface for the valve. It suits riders and technicians rebuilding a 1503 engine who need reliable valve sealing without replacing the whole head. The valve seat sleeve is a direct-fit option for tired or damaged seats in the Sea-Doo Speedster 430.

Built For Performance

• Precision-machined seating surface for correct valve-to-seat contact
• Helps restore compression lost to worn or pitted seats
• Made from durable material suited to high combustion temperatures
• Direct replacement for OEM part number 420256606
• Built for the 1503 engine platform in the Speedster 430

Fits These Machines

• for Sea-Doo Speedster 430 1503 (2008)

On-The-Job Use

• Cylinder head rebuilds on the 1503 engine
• Valve job service when seats are worn, pitted, or recessed
• Restoring lost compression on a high-hour Speedster 430
• Top-end refresh during routine engine maintenance

Specs At A Glance

Good To Know

Q: Is this valve seat sleeve sold individually? A: Yes, this listing covers one valve seat sleeve matching OEM part number 420256606. Adjust the quantity to match the work your cylinder head needs.

Q: Will this sleeve drop straight into my head? A: Valve seat sleeves are generally pressed in and then cut to the correct valve angle and installed height by a machine shop. Check your service manual for the exact installation and finishing steps before ordering.

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