Fuel Management

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake portsProvide quicker, sharper throttle response and more horsepower throughout rpm rangeSpecially-designed reed cage holds Boyesen's patented...

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake portsProvide quicker, sharper throttle response and more horsepower throughout rpm rangeSpecially-designed reed cage holds Boyesen's patented...

Long reed stops added to progressively slow reed petal tip velocity for increased petal durabilityReduced frontal area of the central wing combined with a more aerodynamic shapeAirfoil shape added to cage tip to increase velocity from outer portsCombined...

Long reed stops added to progressively slow petal tip velocity, for increased petal durabilityReduced frontal area of central wing by 15.6%, combined with a more aerodynamic shapeCombined reed tip area increased by 10.5%, resulting in increased total...

Long reed stops added to progressively slow reed petal tip velocity for increased petal durabilityReduced frontal area of the central wing combined with a more aerodynamic shapeAirfoil shape added to cage tip to increase velocity from outer portsCombined...

When ordering replacement reeds, order one set per reed cage and confirm replacement reeds have the same number of petals as the set you are replacingSnap-together cage uses symmetrical reed petals, eliminating the need for different "inner" and "outer"...

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake portsProvide quicker, sharper throttle response and more horsepower throughout rpm rangeSpecially-designed reed cage holds Boyesen's patented...

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake portsProvide quicker, sharper throttle response and more horsepower throughout rpm rangeSpecially-designed reed cage holds Boyesen's patented...

Used to install a stock CV carburetor on S&S 3.625", 4" and 4.125" bore motorsWill also fit S&S Hot Setup and Super Stock? head kitsMade in the U.S.A.Requires the use of S&S manifold O-rings and U-rings, sold separately.

Vforce/Moto Tassinari V-Force 4X Reed Valve Set - Yamaha V4X07Em Yamaha -- YZ 250 -- (2002, 2001, 2009, 2012, 2003, 2006, 2016, 2024, 2007, 2023, 2014, 2004, 2015, 2018, 1997, 1999, 2000, 2010, 2013, 2017, 2019, 2020, 1998, 2008, 2021, 2005, 2011, 2022);...

When ordering replacement reeds, order one set per reed cage and confirm replacement reeds have the same number of petals as the set you are replacingSnap-together cage uses symmetrical reed petals, eliminating the need for different "inner" and "outer"...

When ordering replacement reeds, order one set per reed cage and confirm replacement reeds have the same number of petals as the set you are replacingSnap-together cage uses symmetrical reed petals, eliminating the need for different "inner" and "outer"...