6S5-12121-00-00 Exhaust Valve for Yamaha FX HO 1800 2009-2023

Exhaust Valve for Yamaha

This exhaust valve for Yamaha is a direct replacement component designed to control exhaust flow in the engine's breathing system, cross-referencing OEM part number 6S5-12121-00-00.

Overview

This exhaust valve for Yamaha is a replacement engine component that regulates exhaust gas flow through the cylinder head. Built to match the 6S5-12121-00-00 specification, this exhaust valve for Yamaha helps restore proper combustion sealing and exhaust scavenging. It suits riders performing top-end service on their personal watercraft engine.

Built For Performance

• Constructed from heat-resistant alloy steel to withstand exhaust gas temperatures
• Precision-ground stem for smooth movement within the valve guide
• Machined face for a consistent sealing surface against the valve seat
• Cross-references OEM part number 6S5-12121-00-00
• Designed as a direct-fit replacement for the original exhaust valve

Fits These Machines

• for Yamaha FX HO 1800 (2009-2023)

On-The-Job Use

• Top-end engine rebuilds and valve service
• Restoring compression after valve wear or burn
• Routine maintenance on Yamaha FX HO 1800 watercraft
• Cylinder head refresh during seasonal servicing

Specs At A Glance

Good To Know

Q: Is this an original Yamaha part? A: No, this is an aftermarket exhaust valve made to the 6S5-12121-00-00 specification for Yamaha applications. It is not manufactured or branded by Yamaha.

Q: How many exhaust valves does my engine need? A: Exhaust valves are typically replaced as a set along with intake valves during a top-end rebuild. Confirm the quantity required for your specific engine 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.