6S5-12121-00-00 Exhaust Valve for Yamaha 190 FSH Sport 1800 2016-2023

Exhaust Valve for Yamaha

This exhaust valve for Yamaha is a replacement engine component that manages exhaust gas flow from the combustion chamber, matching OEM part number 6S5-12121-00-00.

Overview

This exhaust valve for Yamaha is a direct-fit engine valve built to seal and release exhaust gases during engine operation. It is made to OEM dimensions so it seats properly in the cylinder head of the 1800 engine found in the 190 FSH Sport. This exhaust valve fits riders and technicians doing top-end service or an engine rebuild.

Built For Performance

• Precision-ground valve face for reliable sealing against the seat
• Heat-resistant steel construction for sustained exhaust temperatures
• Stem machined to OEM tolerances for correct valve guide fit
• Cross-references OEM part number 6S5-12121-00-00
• Balanced for consistent valve motion at high RPM

Fits These Machines

• for Yamaha 190 FSH Sport 1800, 2016-2023

On-The-Job Use

• Top-end rebuilds on the 1800 engine
• Valve replacement after compression loss or burnt valve diagnosis
• Cylinder head service on the 190 FSH Sport
• Maintenance for high-hour marine engines

Specs At A Glance

Good To Know

Q: Should exhaust valves be replaced as a set? A: Many engine builders replace all valves in the head at once so wear stays even across cylinders. Check the valve guides and seats before installing this exhaust valve.

Q: Does this valve need lapping after installation? A: A light lap is often used to confirm seat contact, and clearances should be verified against your service manual. Follow the engine manufacturer's torque and adjustment specs.

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