It appears you're interested in specifications for the Pitster Pro X5 155. This Minibike, cross model is powered by a Single cylinder, four-stroke engine with 140.00 ccm (8.54 cubic inches) of actual displacement before 9.2:1 compression. Fueling is metered via allowing this machine to produce its horsepower and torque. According to our records engine heat of the Pitster Pro X5 155 is moderated by Oil & 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 2.50-14 and the rear is 80/100-12 . The entire package is supported by the frame, Chromoly frame with engine cradle. Subframe: Chromoly Removable.. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc. Hydraulic. front brakes and Single disc. Hydraulic. rear brakes. The Pitster Pro X5 155 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.