V FORCE 4R REED KIT YAMAHA YZ125X 19-ON YZ125 05-ON Category_Fatigue Mats The difference in stiffness between

The difference in stiffness between the top reed and the bottom reed allow the reeds to respond quickly and accurately to changes in engine pressure

the Buckin’ Roll is the ideal choice

Designed to fit OE perch

adjust the volume

Double density rubber sole

V FORCE 4R REED KIT YAMAHA YZ125X 19-ON YZ125 05-ON Category_Fatigue Mats The difference in stiffness betweenThe VForce4 is built upon the solid foundation that made the VForce3 reed valve system such a success for over fifteen years. While the VForce3 has been continually refined over the years (including the latest VForce3R models), this is a complete redesign of the entire system. We jokingly say, "The only thing we didn't change is the bolt pattern." However this is actually quite true. All the components that go into making a VForce reed valve system