Vintage Motorcycle Parts BMI Karts and Parts has one of the largest inventories of vintage motorcycle parts in the USA. BMI has an enormous selection of parts for vintage Harley-Davidsons including: Knuckleheads, Panheads, Shovelheads, Servi-cars, Sportsters, and more. Including OEM packaged Harley parts that date back to WWII. Sub-Categories Motorcycle Tire Sale Event!