World's Fastest Indian?

My grandfather used to race motorbikes on the beach here. It was a thing in New Zealand that people did, a little bit like racing out on the Salt Flats of Utah. Have you seen World's Fastest Indian? First of all, I don't think you can say Indian anymore. And secondly... Is it from Indian? If you're from India. The film is called World's Quick Moving Native American. Not yet, but it's on my list.