6S5-12121-00-00 Exhaust Valve for Yamaha FX Cruiser SVHO LTD 1800

Exhaust Valve for Yamaha FX Cruiser SVHO LTD 1800

This exhaust valve for Yamaha FX Cruiser SVHO LTD 1800 personal watercraft replaces OEM part 6S5-12121-00-00, controlling exhaust gas flow through the cylinder head for consistent engine breathing.

Overview

This exhaust valve for Yamaha FX Cruiser SVHO LTD 1800 is a direct-fit replacement for the original valve used in the 1800cc supercharged engine. It seals combustion pressure during the compression and power strokes and opens to release exhaust gases on schedule. Built for riders and mechanics servicing 2017 through 2026 models, this exhaust valve keeps valve timing accurate and engine output steady.

Built For Performance

• Precision-ground valve face for a positive seal against the valve seat
• Heat-resistant alloy construction suited to the SVHO's high exhaust temperatures
• Stem dimensions held to OEM 6S5-12121-00-00 tolerances for a drop-in fit
• Hardened tip resists wear from repeated camshaft contact
• Balanced for smooth operation at high RPM
• Corrosion-resistant finish for marine environments

Fits These Machines

• for Yamaha FX Cruiser SVHO LTD 1800, 2017-2026

On-The-Job Use

• Top-end rebuilds on supercharged 1800cc Yamaha PWC engines
• Valve replacement after compression loss or burnt valve symptoms
• Routine cylinder head servicing on FX Cruiser SVHO LTD models
• Performance maintenance for rental and personal watercraft fleets

Specs At A Glance

Good To Know

Q: Is this an original Yamaha part? A: This is an aftermarket exhaust valve made to replace OEM part 6S5-12121-00-00, not an original Yamaha product. It is designed to match factory fit and function for the listed FX Cruiser SVHO LTD 1800 models.

Q: Should I replace just one exhaust valve? A: Valve wear is usually consistent across the cylinder head, so replacing all exhaust valves at once is common during a rebuild. Check valve guides, seals, and seat condition while the head is off.

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