8fun electric bike hub motor 42T gear set fits 8fun / busettii hub motor same day shipping order by 3PM ! The 2nd item free shipping ! From new motor , Unused ! But has some motor oil on surface. 42T X 14mm X 55mm fits old style 8fun / busettii motor. We have another size : 42T X 14mm X 54mm fits new style 8fun / busettii motor. Also we have this motor case for sale .