Dated info Nate. Believe it or not, BMW and Triumph have a worse service record, over all, than Harley does. Make no mistake, Harley had some reliability issues over the years, and even as recently as the early Twin Cams. Virtually any 103, and M8 is a pretty solid platform. Like any bike, it's when you don't keep up with the scheduled service things go bad. I fully admit that, for the most part, the Japanese motorcycles are very reliable as far as motorcycles go. AND, that have been in the past when Harley ... not so much. And like with any motorcycle you purchase used, you really never know what you are buying until you know what you bought.Neither the 1300 nor the 1800 has more than two or three "common problems" (reality says the are maintenance or wear items - not problems).
Go own a Harley of the same model year as the VTX you're talking about and learn quickly about "far more problems".