It appears you're interested in specifications for the Derbi GP1 50 Racing. This Scooter model is powered by a Single cylinder, two-stroke engine with 49.38 ccm (3.01 cubic inches) of actual displacement before 10.5:1 compression. Fueling is metered via allowing this machine to produce its horsepower and torque. According to our records engine heat of the Derbi GP1 50 Racing is moderated by Liquid. You'll need to get familiar with the Automatic transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 120/70-14 and the rear is 140/60-14 . 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 Derbi GP1 50 Racing 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.