6S5-12121-00-00 Exhaust Valve for Yamaha VXS 1800 2011-2016 PWC

Exhaust Valve for Yamaha

This exhaust valve replaces OEM part 6S5-12121-00-00 for Yamaha VXS 1800 watercraft, controlling exhaust flow out of the combustion chamber for reliable engine operation.

Overview

This exhaust valve is a direct replacement component for Yamaha VXS 1800 personal watercraft, cross-referenced to OEM part number 6S5-12121-00-00. It manages the release of exhaust gases from the cylinder head, helping maintain proper compression and engine timing. Built for riders and mechanics servicing 2011 through 2016 models who need a dependable valve without paying original equipment pricing.

Built For Performance

• Cross-referenced to OEM part number 6S5-12121-00-00 for direct fitment
• Constructed from heat-resistant alloy steel to withstand combustion temperatures
• Precision-ground valve face for a consistent seal against the valve seat
• Designed to match factory stem dimensions for correct guide fitment
• Resists carbon buildup and pitting under sustained high-RPM use

Fits These Machines

• for Yamaha VXS 1800 (2011-2016)

On-The-Job Use

• Top-end rebuilds on Yamaha 1800cc marine engines
• Routine valve service and clearance adjustments
• Restoring compression on high-hour watercraft
• Cylinder head refurbishment projects

Specs At A Glance

Good To Know

Q: Do I need to replace all valves at once? A: It is generally recommended to inspect and replace valves as a set when doing a top-end rebuild, since wear tends to be even across the cylinder head.

Q: Does this valve require lapping or adjustment after install? A: Yes, valve clearance should be checked and set to factory specification after installation, and the valve face may benefit from lapping to ensure a proper seal.

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