It appears you're interested in specifications for the Xmotos XB-21D. This Minibike, cross model is powered by a Single cylinder, four-stroke engine with 50.00 ccm (3.05 cubic inches) of actual displacement before 9.7:1 compression. Fueling is metered via allowing this machine to produce its 6.70 HP (4.9 kW) horsepower and torque. According to our records engine heat of the Xmotos XB-21D is moderated by Air. You'll need to get familiar with the Automatic transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is and the rear is . 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 Xmotos XB-21D was launched in 2008, 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.