It appears you're interested in specifications for the Harley-Davidson Hummer. This Naked bike model is powered by a Single cylinder, two-stroke engine with 125.00 ccm (7.63 cubic inches) of actual displacement before 6.6:1 compression. Fueling is metered via allowing this machine to produce its horsepower and torque. According to our records engine heat of the Harley-Davidson Hummer is moderated by . You'll need to get familiar with the transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 3.25-19 and the rear is 3.25-19 . 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 Expanding brake (drum brake) front brakes and Expanding brake (drum brake) rear brakes. The Harley-Davidson Hummer was launched in 1959, 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.