Originally Posted by Nougat
In general terms: The spinning of the clutch causes the clutch weights to overcome the spring pressure at high RPMs, which cause the clutches to come together. When the engine is turning at a lower RPM, there's not enough spin for the weights to overcome those springs' tension, and the clutches are apart.
No, not a centrifugal clutch. I understand the weights on a centrifugal. Look at the picture of the clutch I am talking about. Its a manual clutch with several stacked fiction plates. One set rides on the shaft the other the housing around the outside of the clutch. The only thing I dont understand is how the spring pressure is released