2011 Harley-Davidson FLSTF Softail Fat Boy, The 2011 Harley-Davidson. Softail. Fat Boy. FLSTF is one of the quintessential cruiser motorcycles. Hearkening to the hardtail choppers of the '60s and '70s, the Harley-Davidson Fat Boy motorcycle keeps that heritage alive more than forty years later. The FLSTF Fat Boy is the original fat custom bike laid-back and luxurious with an unmistakable profile on the road. Take a seat on this Harley and get the experience of one of the 2011 Harley cruiser motorcycles.