6S5-12121-00-00 Exhaust Valve for Yamaha FZR 1800 2009-2016

Exhaust Valve for Yamaha

This exhaust valve, reference 6S5-12121-00-00, controls exhaust gas flow from the combustion chamber on Yamaha FZR 1800 watercraft.

Overview

The exhaust valve for Yamaha is a direct replacement component engineered to seat and seal against the cylinder head, regulating exhaust flow on the FZR 1800. This exhaust valve restores proper compression and combustion sealing for riders servicing top-end components. Built to OEM cross-reference 6S5-12121-00-00, it suits mechanics and owners doing routine valve service.

Built For Performance

• Machined valve head for a precise seat contact
• Heat-resistant alloy construction suited to exhaust temperatures
• Stem dimensions matched to OEM 6S5-12121-00-00 specifications
• Designed for consistent sealing across the combustion cycle
• Direct-fit replacement for worn or burned exhaust valves

Fits These Machines

• for Yamaha FZR 1800 (2009-2016)

On-The-Job Use

• Top-end rebuilds on Yamaha FZR 1800 watercraft
• Valve clearance adjustment service
• Cylinder head reconditioning
• Restoring compression after valve burn

Specs At A Glance

Good To Know

Q: Should exhaust valves be replaced in sets? A: Replacing all valves together during a top-end service keeps wear even and avoids repeat teardown. Inspect seats and guides at the same time.

Q: Is valve clearance adjustment needed after install? A: Yes, clearance should be checked and set to factory specification once the new valve is seated. Confirm the shim or adjustment method for your model.

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