6S5-12121-00-00 Exhaust Valve for Yamaha 190 FSH Sport 1900 2024-2026

Exhaust Valve for Yamaha

This exhaust valve for Yamaha is a replacement engine component that controls exhaust gas flow out of the combustion chamber, and it cross-references OEM part number 6S5-12121-00-00.

Overview

This exhaust valve for Yamaha is a direct-fit engine valve designed to seal and release exhaust gases during the combustion cycle. It is built to OEM dimensions so it seats correctly in the cylinder head of the 1900 engine used in the 190 FSH Sport. This exhaust valve suits riders and mechanics handling top-end service or a full engine rebuild.

Built For Performance

• Precision-ground valve face for a clean seal against the valve seat
• Heat-resistant steel construction suited to continuous exhaust temperatures
• Stem dimensions machined to OEM tolerances for correct guide fit
• Cross-references OEM part number 6S5-12121-00-00
• Balanced for smooth, consistent valve operation at high RPM

Fits These Machines

• for Yamaha 190 FSH Sport 1900, 2024-2026

On-The-Job Use

• Top-end rebuilds on the 1900 engine
• Valve replacement after compression loss or burnt valve diagnosis
• Cylinder head service on the 190 FSH Sport
• Routine 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. Inspect 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 verify seat contact, and clearances should be checked 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.