It appears you're interested in specifications for the Vespa PX 150. This Scooter model is powered by a Rotary valve induction in crankcase Single cylinder, two-stroke engine with 149.60 ccm (9.13 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the Vespa PX 150 is moderated by Air. You'll need to get familiar with the 4-speed transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 3.50-10 and the rear is 3.50-10 . The entire package is supported by the frame, Monocoque steel 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 Expanding brake (drum brake) rear brakes. The Vespa PX 150 was launched in 2013, 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.