- Complete rebuild kit with O-rings, diaphragm, spring, and screws to restore carburetor air cut-off function
- Multi-carb models include components for all carbs; direct OEM replacement for reliable performance
- Fixes sticking valves causing poor idle, popping on deceleration, and lean running conditions
- Models with multiple carburetors include components to repair all carburetors
The QuadBoss Air Cut-Off Valve Kit is designed to rebuild the carburetor air cut-off valve circuit on select Yamaha powersports models. It includes the O-rings, diaphragm, spring, and screws necessary to restore air cut-off valve function and address sticking valves that may contribute to poor idle, lean running conditions, or popping during deceleration.
This kit is a direct OEM replacement for reliable performance. On models equipped with multiple carburetors, the kit includes components to repair all carburetors. It fits select 2000–2005 Yamaha YFM400 Big Bear 2x4 and 4x4 models and 2001–2005 Yamaha YFM660R Raptor models listed below. Manufacturer part number: 420588. Vendor part number: 420588.
Fitment includes the 2001–2005 Yamaha YFM660R Raptor; 2000–2002 Yamaha YFM400 Big Bear 2x4; and 2000–2002 Yamaha YFM400 Big Bear 4x4. Verify the model and year before ordering.
Features:
- Complete rebuild kit: Includes O-rings, diaphragm, spring, and screws for rebuilding the carburetor air cut-off valve circuit.
- Air cut-off valve restoration: Helps address sticking valves that can cause poor idle, lean running conditions, and popping during deceleration.
- Multi-carburetor coverage: Models with multiple carburetors include components to repair all carburetors.
- Replacement design: Direct OEM replacement for reliable performance.
- Fitment: Fits select Yamaha YFM400 Big Bear 2x4, Yamaha YFM400 Big Bear 4x4, and Yamaha YFM660R Raptor models from the listed years.
- Manufacturer part number: 420588.
- Vendor part number: 420588.
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1
Clearance Item: t
Fitment:
2000 Yamaha YFM400 Big Bear 2x4 Base
2000 Yamaha YFM400 Big Bear 4x4 Base
2001 Yamaha YFM400 Big Bear 2x4 Base
2001 Yamaha YFM400 Big Bear 4x4 Base
2001 Yamaha YFM660R Raptor Base
2002 Yamaha YFM400 Big Bear 2x4 Base
2002 Yamaha YFM400 Big Bear 4x4 Base
2002 Yamaha YFM660R Raptor Base
2003 Yamaha YFM400 Big Bear 2x4 Base
2003 Yamaha YFM400 Big Bear 4x4 Base
2003 Yamaha YFM660R Raptor Base
2004 Yamaha YFM400 Big Bear 2x4 Base
2004 Yamaha YFM400 Big Bear 4x4 Base
2004 Yamaha YFM660R Raptor Base
2005 Yamaha YFM400 Big Bear 4x4 Base
2005 Yamaha YFM660R Raptor Base
2006 Yamaha YFM400 Big Bear 4x4 Base
2007 Yamaha YFM250 Big Bear Base
2007 Yamaha YFM350 Grizzly IRS 4x4 Auto Base
2008 Yamaha YFM250 Big Bear Base
2008 Yamaha YFM350 Grizzly IRS 4x4 Auto Base
2009 Yamaha YFM250 Big Bear Base
2009 Yamaha YFM350 Grizzly IRS 4x4 Auto Base
2010 Yamaha YFM350 Grizzly IRS 4x4 Auto Base
2011 Yamaha YFM350 Grizzly IRS 4x4 Auto Base