It appears you're interested in specifications for the Sachs Roadster 650. This Naked bike model is powered by a Single cylinder, four-stroke engine with 644.00 ccm (39.30 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 Sachs Roadster 650 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 120/70-ZR17 and the rear is 160/60-ZR17 . 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 Single disc rear brakes. The Sachs Roadster 650 was launched in 2006, 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.