Keihin PWK carburetors is the dominant carb on the factory machines. In short because of their great performance they come stock on a lot of the leading brand bikes. Above All PWK Features are.
Chromed semi-flat (D) throttle valve for excellent response and more flow at high RPM. Throttle bores sized to give maximum power. Easy jetting with jetting parts available. Quad Vents: Eliminates post jump bogging from fuel plugged vent passages.