420256606 Valve Seat Sleeve for Sea-Doo RXT STD 1503 260 2017

Valve Seat Sleeve for Sea-Doo RXT STD 260 1503

This valve seat sleeve, part number 420256606, is a replacement engine component made to seat and guide the valve in the 1503 engine used by the Sea-Doo RXT STD 260.

Overview

This valve seat sleeve is a cylinder head component designed to give the valve a durable, precisely machined surface to seal against. Built as a direct reference to part 420256606, it suits the 1503 engine found in the Sea-Doo RXT STD 260 and helps restore proper valve seating during a top end rebuild. It is intended for riders, mechanics, and rebuilders servicing this engine platform.

Built For Performance

• Machined to match OEM reference 420256606 for the 1503 engine
• Provides a hardened seating surface for the valve to seal against
• Helps restore compression when the original seat is worn or damaged
• Designed for press fit installation into the cylinder head
• Sold as a single replacement sleeve

Fits These Machines

• for Sea-Doo RXT STD 260, 1503, 2017

On-The-Job Use

• Cylinder head service and valve jobs on the 1503 engine
• Top end rebuilds after valve seat wear or damage
• Shop repairs on Sea-Doo RXT STD 260 personal watercraft
• Restoring valve sealing and compression during engine refresh

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is an aftermarket valve seat sleeve made to reference part 420256606. Confirm it matches your engine and head before ordering.

Q: Do valve seat sleeves require machining after installation? A: Valve seat sleeves are typically pressed in and then cut or lapped so the valve seats correctly. Have the head serviced by a qualified machinist for proper sealing.

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