This clutch is a centrifugal type that rotates anticlockwise when fitted 3 for Stronger Mini Moto centrifugal Clutchs Tempered heat treated springs with composite linings This clutch does not require a keyway when fitted but it may have the groove for one Fitment: For all 47cc 49cc cooled Mini Motos and Pocket bikes Will fit both woodruff and non-woodruff engines. Specifications: Condition: This is a new item. Color: Like the picture showed Size: 75x16mm/2.95x0.63" (DxT) Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you No Retail Package Package Contents: 1 x Minimoto Clutch