It appears you're interested in specifications for the Harley-Davidson FL Hydra Glide. This Touring model is powered by a Knucklehead V-twin engine V2, four-stroke engine with 1208.00 ccm (73.71 cubic inches) of actual displacement before 7.0:1 compression. Fueling is metered via Carburettor allowing this machine to produce its 55.00 HP (40.1 kW) horsepower and torque. According to our records engine heat of the Harley-Davidson FL Hydra Glide is moderated by Air. You'll need to get familiar with the 4-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 5.00-16 and the rear is 5.00-16 . The entire package is supported by the frame, Steel double downtube. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Expanding brake (drum brake) front brakes and Expanding brake (drum brake) rear brakes. The Harley-Davidson FL Hydra Glide was launched in 1954, 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.