The DYNA FLOW carburetor inlet valve design provides "shock absorber" needle damping and a varying size fuel outlet insuring dependable fuel flow under extreme vibration conditions. More consistent fuel flow exists at all engine operating conditions resulting in more consistent carburetion. The stability of the valve is especially beneficial at low speed and mid-range where the throttle response is crisper with smoother acceleration. Viton and steel tipped designs are available for Mikuni VM roundslide, Mikuni TM and TMX flatslide, and Keihin PWK flatslide in all Inlet opening sizes. Other designs available upon request.