Harley-Davidson motorcycles are among the most customized vehicles in the world. No, not just the motorcycling world- the entire vehicular industry.
From Hondas to Ferraris, Suzukis to freakin' Trek bicycles, of all the vehicles that propel mankind, Harley-Davidsons are among those few makes that just demand their owners tailor them to their own personalities. Whether that's something small like a different windscreen or set of handlebars, to far larger, more one-off setups, like a fully custom front end, rear, tank, etc, Harleys see it all, and lend themselves to doing it all. They're very much like the Lego of the motorcycling world. You just swap one part for another and, bing, bang, boom, you've got a custom bike.