The NAMURA VX-09521E Exhaust Valve is an OEM replacement valve designed for select Yamaha ATV applications. Manufactured for dependable fit and service performance, this valve fits the 2011 Yamaha YFZ450X SE and 2009–2017 Yamaha YFZ450R. It is suitable for restoring proper exhaust valve operation during engine rebuilding, cylinder head service, or routine powertrain maintenance.
Constructed from durable SUH35B heat-resistant steel, the valve features a full Nitride finish to improve durability and resistance to corrosion. The material and surface treatment are selected to withstand the demanding temperatures and operating conditions found in high-performance ATV engines. The valve is produced in an ISO 9001-certified factory for consistent manufacturing quality.
Feature: OEM replacement exhaust valve for select Yamaha YFZ450R and YFZ450X SE models.
Feature: Made from heat-resistant SUH35B steel for reliable service performance.
Feature: Full Nitride finish helps improve wear resistance and corrosion protection.
Feature: Manufactured in an ISO 9001-certified facility.
Feature: Manufacturer part number VX-09521E; vendor part number 183-09521E.
Verify the model year and engine application before installation. The NAMURA VX-09521E is intended for the listed Yamaha YFZ450 applications and should be installed according to the vehicle manufacturer's service procedures. This product is an exhaust valve replacement component and is not identified as a performance valve with Stellite-tipped construction.
Features:
- OEM replacement exhaust valve for the 2011 Yamaha YFZ450X SE and 2009–2017 Yamaha YFZ450R
- Constructed from durable SUH35B heat-resistant steel
- Full Nitride finish improves durability and resistance to corrosion
- Manufactured in an ISO 9001-certified factory
- Brand: NAMURA
- Manufacturer part number: VX-09521E
- Vendor part number: 183-09521E
Fitment:
2004 Yamaha YFZ450
2005 Yamaha YFZ450
2006 Yamaha YFZ450
2006 Yamaha YFZ450 Bill Balance Edition
2007 Yamaha YFZ450
2007 Yamaha YFZ450 Bill Balance Edition
2007 Yamaha YFZ450 SE
2008 Yamaha YFZ450
2008 Yamaha YFZ450 SE
2009 Yamaha YFZ450
2009 Yamaha YFZ450R
2009 Yamaha YFZ450R SE
2010 Yamaha YFZ450R
2010 Yamaha YFZ450R SE
2010 Yamaha YFZ450X
2010 Yamaha YFZ450X Bill Ballance
2011 Yamaha YFZ450R
2011 Yamaha YFZ450R SE
2011 Yamaha YFZ450X
2011 Yamaha YFZ450X SE
2012 Yamaha YFZ450R
2012 Yamaha YFZ450R SE
2013 Yamaha YFZ450R
2013 Yamaha YFZ450R SE
2014 Yamaha YFZ450R
2014 Yamaha YFZ450R SE
2015 Yamaha YFZ450R
2015 Yamaha YFZ450R SE
2016 Yamaha YFZ450R
2016 Yamaha YFZ450R SE
2017 Yamaha YFZ450R
2017 Yamaha YFZ450R SE
2018 Yamaha YFZ450R
2018 Yamaha YFZ450R SE