It appears you're interested in specifications for the Aprilia SR 50 Factory. This Scooter model is powered by a Hi-Per 2 Pro engine Single cylinder, two-stroke engine with 49.0 ccm (2.99 cubic inches) of actual displacement before 12.1:1 compression. Fueling is metered via Carburettor allowing this machine to produce its 4.0 HP (2.9 kW) @ 7000 RPM horsepower and 4.0 Nm (0.4 kgf-m or 3.0 ft.lbs) @ 6500 RPM torque. According to our records engine heat of the Aprilia SR 50 Factory is moderated by Liquid. You'll need to get familiar with the Automatic transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 130/60-13 and the rear is 130/60-13 . The entire package is supported by the frame, Split single cradle frame in high tensile strength steel tube . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc. 2 opposing pistons front brakes and Single disc. 2 opposing pistons rear brakes. The Aprilia SR 50 Factory was launched in 2021, 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.