of fig1 14 in this embodiment the inner hub 11d has a pair of oppositely disposed flange portions 14d with diverging edges 34d having spring recesses 63d and corner notches 81 the arcuate periphery 35d has a notch 82 receiving a generally i shaped centrifugal weight 83 the notch 82 and weight 83 having facing spring recesses 84 84 on the opposite sides to receive retractor springs 85 the outer hub 38d includes an annular ring 39d having elongated notches 41d in the outer periphery for the stop pins 21d joining the clutch plate 15d and spring retainer plate 28d a generally circular inner periphery 42d interrupted by a pair of oppositely disposed inwardly extending flange portions 43d having converging edges 44d inward corner portions 86 adjacent the edges and adapted to be conformably received in the corner notches 81 and a recess 87 adapted to receive the outer edge of each weight 83 the edges 44d are provided with spring recesses 65d facing the recesses 63d to receive the idle rattle springs 58d the inner end of each flange portion 43d has an arcuate recess 88 providing a reduced thickness inner end with the recesses providing piloting of the friction plates 51d each flange portion having a central opening 89 to receive the inwardly bent tabs 52d of the friction plates the inner circumference of the friction plates acts to pilot rotation of the inner hub 11d and the gaps or spaces 49d are provided.