6S5-12121-00-00 Exhaust Valve for Yamaha 252SD 1900 2024-2026

Exhaust Valve for Yamaha 252SD

This exhaust valve, reference 6S5-12121-00-00, controls exhaust flow in the 1900 engine used across 2024-2026 Yamaha 252SD models.

Overview

This exhaust valve is a replacement component for the Yamaha 252SD equipped with the 1900 engine. The exhaust valve opens and closes at the right moment to release combustion gases, helping the engine breathe and run cleanly. It suits owners maintaining or rebuilding a 2024-2026 Yamaha 252SD who need a fresh valve that matches the original fit.

Built For Performance

• Direct replacement for OEM reference 6S5-12121-00-00
• Precision-ground valve face for a clean seal against the seat
• Heat-resistant alloy construction suited to exhaust temperatures
• Stem dimensions matched to the 1900 cylinder head guide
• Designed to maintain proper compression and exhaust flow

Fits These Machines

• for Yamaha 252SD 1900 (2024-2026)

On-The-Job Use

• Top-end engine rebuilds on the 1900 powerplant
• Replacing a burned or leaking exhaust valve
• Routine maintenance for high-hour 252SD boats
• Restoring compression and exhaust sealing

Specs At A Glance

Good To Know

Q: Does this valve fit the 1900 engine in the 252SD? A: Yes, it is listed for the 2024-2026 Yamaha 252SD with the 1900 engine and matches reference 6S5-12121-00-00.

Q: Should valves be replaced as a set? A: Replacing all exhaust valves at once is common practice during a top-end rebuild to keep wear consistent across the head.

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