HARLEY-DAVIDSON® FATBOY® One of the motorcycles contributing to the ongoing HARLEY-DAVIDSON® legend is the FAT BOY®. An instant hit when it was introduced in 1990, this hog has remained extremely popular and highly desirable ever since. The FAT BOY® is the epitome of HARLEY® styling. Though powered by a V-Twin engine, with dual exhausts, the bike takes its name from the fat rubber tires that roll down the road on solid disc wheels. You're sure to be in hog heaven with this HARLEY® model!