Softail Fat Boy Lo The 2011 Harley-Davidson Softail Fat Boy Lo FLSTFB has all the features you expect on custom Harley motorcycles. Hearkening to the "hardtail" choppers of the '60s and '70s, the Fat Boy Lo is one of the custom Harley motorcycles that keeps that heritage alive more than 40 years later. And this special edition shows a darker side of the original "fat custom" bike — laid-back and blacked-out with an unmistakable profile on the road. Take a minute and learn about all the features of the Fat Boy Lo.