The bike shown in the crash scene was not the Captain America Harley. It was a Japanese bike with a tall sissy bar on it. See the scene where the bike is headed for the ditch without a rider. Look closely.
There are so many Captain America clones, I wouldn't bet even this one is correct. Give me a few$ and I will document anything you want!LOL. No one has mentioned engine serial numbers, but even they can be changed......................MO
......Grizzly Adams would kick your butt for calling him out on that, hehe......