It appears you're interested in specifications for the BMW R 45. This Classic model is powered by a Two cylinder boxer, four-stroke engine with 473.00 ccm (28.86 cubic inches) of actual displacement before 9.2:1 compression. Fueling is metered via allowing this machine to produce its 35.00 HP (25.5 kW) horsepower and torque. According to our records engine heat of the BMW R 45 is moderated by Air. You'll need to get familiar with the 5-speed transmission and pay attention to final drive Shaft drive (cardan) maintainence. Our best information shows that the front tire size is 3.25-18 and the rear is 4.00-18 . 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 Single disc front brakes and Expanding brake rear brakes. The BMW R 45 was launched in 1983, 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.