This CD disk, contains exploded views and part numbers, for all Harley Hummer lightweight motorcycles, from 1948 to 1965. Also includes specific service instructions, for the 1959 -1966 models, which also applys to the 1948 to 1958 Harley Hummer models. The great feature of this complete CD disk, is that you can view all pages (parts and service) on your computer, and print off exactly what pages you need. If the pages get dirty, simply print off more! Less expensive than 1 book, and far more useful!