It appears you're interested in specifications for the Polini 911 GP4 Reverse. This Minibike, sport model is powered by a Single cylinder, two-stroke engine with 39.90 ccm (2.43 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor. SHA 14.14 allowing this machine to produce its 6.20 HP (4.5 kW) horsepower and torque. According to our records engine heat of the Polini 911 GP4 Reverse is moderated by . You'll need to get familiar with the transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 90/65-R6.5 and the rear is 110/50-R6.5 . The entire package is supported by the frame, Latticed tubular 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 Polini 911 GP4 Reverse was launched in 2007, 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.