It appears you're interested in specifications for the Harley-Davidson Softail Fat Boy. This Custom / cruiser model is powered by a V2, four-stroke engine with 1690.00 ccm (103.12 cubic inches) of actual displacement before 10.0:1 compression. Fueling is metered via Injection. Electronic Sequential Port Fuel Injection allowing this machine to produce its 78.00 HP (56.9 kW) horsepower and 132.00 Nm (13.5 kgf-m or 97.4 ft.lbs) torque. According to our records engine heat of the Harley-Davidson Softail Fat Boy is moderated by Air. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 140/75-R17 and the rear is 200/55-R17 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Double disc. ABS. 4-piston. front brakes and Single disc. ABS. 2-piston. rear brakes. The Harley-Davidson Softail Fat Boy was launched in 2016, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.