HD bikes are made of about 77% Yankee parts and the rest Indonesian, Mexican, or Asian. Most of the electrical stuff is foreign. Also, about 12% of HD parts are made in Canada (i.e. NOT American). HD is no more "American" than most other bikes. It's all hype.
Not sure where you're getting your info from . I dont know what percentage of parts are foreign but well known fact is that companies outsource to other countries to get things made. Makes me freaking mad any american company would do this but happening everywhere, even hersheys chocolate is being made overseas. So I bet you dollars to doughnuts that harleys have more foreign parts (and all other so called american products) than you realize.