It appears you're interested in specifications for the Harley-Davidson Model A. This Sport model is powered by a Single cylinder, four-stroke engine with 345.00 ccm (21.05 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the Harley-Davidson Model A is moderated by . You'll need to get familiar with the transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 27-Mar and the rear is 27-Mar. 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 front brakes and rear brakes. The Harley-Davidson Model A was launched in 1926, 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.