There are 5 condition grades for Harley-Davidson. There are many options that may affect the final value on Harley-Davidson motorcycles such as multi-speed transmissions, clutch assembly, electronics,engine options, dual brakes, side cars, etc. These options will be covered in upcoming editions. As you use this price guide for pre-1920 Harley-Davidson motorcycles, please keep in mind that some values indicated are based on the limited pricing data available. These prices will be updated as more data is collected. Your comments on the Harley-Davidson motorcycle values shown are very much welcomed.