8GL-12121-10-00 Exhaust Valve for Yamaha EX-R 1050 2019-2021

Exhaust Valve for Yamaha

This exhaust valve, part number 8GL-12121-10-00, controls exhaust flow on Yamaha EX-R 1050 watercraft so the engine breathes and runs as intended.

Overview

This exhaust valve for Yamaha fits the EX-R 1050 and carries OEM cross-reference 8GL-12121-10-00 for easy verification. It regulates exhaust gas flow from the cylinder, helping the engine maintain proper compression and power delivery. It is suited to riders who need a dependable replacement exhaust valve for Yamaha personal watercraft.

Built For Performance

• OEM cross-reference 8GL-12121-10-00 for straightforward part matching
• Constructed to withstand high exhaust temperatures
• Seals against the cylinder to maintain proper compression
• Precision dimensions for a correct fit in the cylinder head
• Direct replacement for the original exhaust valve

Fits These Machines

• for Yamaha EX-R 1050 (2019-2021)

On-The-Job Use

• Routine top-end maintenance on Yamaha EX-R 1050 watercraft
• Rebuilding a cylinder head after valve wear or damage
• Restoring proper exhaust flow for consistent engine performance

Specs At A Glance

Good To Know

Q: Is this an original Yamaha part? A: This is an aftermarket exhaust valve for Yamaha that matches OEM reference 8GL-12121-10-00. Confirm your engine serial number before ordering.

Q: How many exhaust valves does my engine need? A: Count the cylinders on your EX-R 1050 and order accordingly for a full top-end service. Replacing valves as a set is common practice.

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