Ping Golf Club Serial Number Check. Finding out what year a Harley Davidson engine was made can be important for a number of reasons. However, decoding an engine’s vehicle identification number can be challenging and confusing. Hidden within a Harley’s engine VIN will be the year that engine was made. Warhammer 40000 Dawn Of War 1 Free Download Full Version on this page. But the decade the engine was made will determine where the year is located on the VIN and what it looks like. 1960s and Older Engines Look on left side of the engine case for the engine number. Harley engines that were made before or in the 1960s have the model year of the engine as the first two numbers of the engine number, which acts as a VIN. Download Nsf Iso Registration Bodies.