It appears you're interested in specifications for the Yamaha R3. This Sport model is powered by a In-line four, four-stroke engine with 321.0 ccm (19.59 cubic inches) of actual displacement before 11.2:1 compression. Fueling is metered via Injection. Electronic injection allowing this machine to produce its 41.4 HP (30.2 kW) @ 10750 RPM horsepower and 28.8 Nm (2.9 kgf-m or 21.2 ft.lbs) @ 9000 RPM torque. According to our records engine heat of the Yamaha R3 is moderated by Liquid. You'll need to get familiar with the transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 110/70-ZR17M/C and the rear is 140/70-ZR17/C . The entire package is supported by the frame, Diamond. 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 Single disc. Hydraulic. rear brakes. The Yamaha R3 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.