It appears you're interested in specifications for the Yamaha YS125. This Allround model is powered by a Reed-valve-inducted Single cylinder, two-stroke engine with 125.0 ccm (7.63 cubic inches) of actual displacement before 10.0:1 compression. Fueling is metered via Injection allowing this machine to produce its 10.5 HP (7.6 kW) @ 7500 RPM horsepower and 10.8 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 6000 RPM torque. According to our records engine heat of the Yamaha YS125 is moderated by Air. 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 2.75-18 and the rear is 100/80-18 . 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 Single disc. Hydraulic. front brakes and Expanding brake (drum brake). Hydraulic. rear brakes. The Yamaha YS125 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.