It appears you're interested in specifications for the Yamaha PW50. This Enduro / offroad model is powered by a Reed-valve inducted Single cylinder, two-stroke engine with 49.00 ccm (2.99 cubic inches) of actual displacement before 6.0:1 compression. Fueling is metered via Carburettor. VM12 allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha PW50 is moderated by Air. You'll need to get familiar with the Automatic transmission and pay attention to final drive Shaft drive (cardan) maintainence. Our best information shows that the front tire size is 2.50-10 and the rear is 2.50-10 . 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 PW50 was launched in 2014, 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.