6S5-12121-00-00 Exhaust Valve for Yamaha 222SE 1800 2023

Exhaust Valve for Yamaha

The Exhaust Valve is an OEM cross-reference 6S5-12121-00-00 replacement component that regulates exhaust gas flow from the combustion chamber in Yamaha marine engines.

Overview

This exhaust valve is a direct-fit replacement for Yamaha personal watercraft and jet boat applications. The exhaust valve for Yamaha engines helps maintain proper compression and exhaust scavenging, supporting smooth engine operation. It suits owners performing top-end rebuilds or replacing a burned or worn exhaust valve.

Built For Performance

• OEM cross-reference 6S5-12121-00-00 for exact fitment
• Constructed from heat-resistant steel alloy for high-temperature exhaust exposure
• Precision-ground valve face for reliable sealing against the valve seat
• Designed to withstand sustained marine engine RPM ranges
• Direct replacement without modification to the cylinder head

Fits These Machines

• for Yamaha 222SE 1800 (2023)

On-The-Job Use

• Top-end engine rebuilds on Yamaha jet boats
• Replacing burned or compression-loss exhaust valves
• Routine valve train maintenance at service intervals
• Cylinder head refurbishment projects

Specs At A Glance

Good To Know

Q: Does this valve require lapping during installation? A: Valve lapping is recommended to ensure a proper seal against the seat, and checking valve clearance after installation is essential for correct engine operation.

Q: Can I replace just one exhaust valve? A: Replacing a single valve is possible, but inspecting all valves and seats in the cylinder head at the same time is advised to avoid repeat labor.

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