Terry's Tech - Harley VIN Numbers. The engine number is the VIN and is located on left case. There are no frame numbers until the 1970 model year. Feb 16, 2010  How do I break down the serial # on a harley evo, trans, primary etc. To determine year model etc? - Answered by a verified Motorcycle Mechanic. Trans, primary etc. To determine year model etc? Submitted: 8 years ago. X is a 1999 (last of the EVO's), and 937872 is the sequential serial number and matches the last 6 numbers of.

Tech's Web Harley-Davidson® Vehicle Identification Number (VIN) Info 1970-1980 Harley Davidson ® VIN Identification Guide This list is unofficial and is not gospel, only what I have been able to cross in various manuals, web sites and dealerships. If you have more updated info on this data, please let me know. Year Groups Model Info VIN Info • Numbers on both frame and engine.

From the factory, the numbers on the frame and engine matched exactly*. (There is an exception to this. See ' The 1979 Exception' below). The legal VIN number is on the frame.