It appears you're interested in specifications for the Aprilia RX 50. This Enduro / offroad model is powered by a Reed intake valve Single cylinder, two-stroke engine with 50.0 ccm (3.05 cubic inches) of actual displacement before 11.5:1 compression. Fueling is metered via Carburettor. Electronically controlled Dell”™Orto PHVA 17.5 carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the Aprilia RX 50 is moderated by Liquid. You'll need to get familiar with the 6-speed transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 80/90-21 and the rear is 110/80-18 . The entire package is supported by the frame, Twin - tube steel. 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 piston floating calliper front brakes and Single disc. Floating calliper rear brakes. The Aprilia RX 50 was launched in 2020, 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.