It appears you're interested in specifications for the Yamaha C3. This Scooter model is powered by a Reed-valve induction Single cylinder, four-stroke engine with 49.00 ccm (2.99 cubic inches) of actual displacement before 12.0:1 compression. Fueling is metered via Injection. Electronic fuel injection allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha C3 is moderated by Liquid. You'll need to get familiar with the Automatic transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 120/90-10 and the rear is 120/90-10 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Expanding brake (drum brake) front brakes and Expanding brake (drum brake) rear brakes. The Yamaha C3 was launched in 2011, 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.