It appears you're interested in specifications for the Sym HD 125. This Scooter model is powered by a Single cylinder, four-stroke engine with 125.00 ccm (7.63 cubic inches) of actual displacement before 10.5:1 compression. Fueling is metered via allowing this machine to produce its 11.40 HP (8.3 kW) horsepower and torque. According to our records engine heat of the Sym HD 125 is moderated by Liquid. 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 100/80-16 and the rear is 120/80-16 . The entire package is supported by the frame, Pipe under bone. 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 Sym HD 125 was launched in 2004, 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.