It appears you're interested in specifications for the DKW Hummel. This Sport model is powered by a Single cylinder, two-stroke engine with 49.00 ccm (2.99 cubic inches) of actual displacement before 1.3:1 compression. Fueling is metered via Carburettor. Bing allowing this machine to produce its horsepower and torque. According to our records engine heat of the DKW Hummel is moderated by Air. 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 and the rear is . The entire package is supported by the frame, Pressed steel . 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 DKW Hummel was launched in 1957, 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.