The V-twin Crocker Special was America’s first true Superbike. These bikes were built in limited numbers from 1936 to 1942. Each one was hand assembled and the customer could specify engine sizes from 61 cubic inches up to 91 cubic inches. The vast majority of the Crocker Specials were 61s. No bike produced by Indian or Harley could come close to matching the performance of a Crocker Special, not even the famed Harley Knucklehead. A bone stock 61 Crocker Special put out 60 horsepower to the Knucklehead’s 40 and could do 120 MPH off the showroom floor.