It appears you're interested in specifications for the Pitster Pro X2 Mini GP. This Minibike, sport model is powered by a Single cylinder, four-stroke engine with 125.00 ccm (7.63 cubic inches) of actual displacement before 10.1:1 compression. Fueling is metered via Carburettor. Mikuni 26mm allowing this machine to produce its horsepower and torque. According to our records engine heat of the Pitster Pro X2 Mini GP is moderated by Air. You'll need to get familiar with the 4-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 100/80-12 and the rear is 120/80-12 . The entire package is supported by the frame, Chromo frame and subframe. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc. Vented Hydraulic Disc front brakes and Single disc. Vented Hydraulic Disc rear brakes. The Pitster Pro X2 Mini GP was launched in 2013, 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.