It appears you're interested in specifications for the BMW R12 Single Carb. This Allround model is powered by a Two cylinder boxer, four-stroke engine with 745.00 ccm (45.46 cubic inches) of actual displacement before 5.2:1 compression. Fueling is metered via Carburettor. CK 25mm allowing this machine to produce its 18.00 HP (13.1 kW) horsepower and torque. According to our records engine heat of the BMW R12 Single Carb 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 3.5-19 and the rear is 3.5-19 . The entire package is supported by the frame, Steel-pressed-loop. 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 BMW R12 Single Carb was launched in 1935, 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.