MB GY6 Forging Blue Titanium Clutch BellThe radiation type clutch bell has radiant design by its appearance and the support structure is lighter. The groove design inside the bowl is the essence of the product. This kind of groove is called "inertial groove design". There are four 0. 25mm grooves in every 1mm2 groove. This design enables the clutch to engage smoothly for the best results. The tornado type is about the effect of rapid heat dissipation brought about by the tornado shape. The