It appears you're interested in specifications for the Yamaha WR155R. This Enduro / offroad model is powered by a Forward-inclined cylinder Single cylinder, four-stroke engine with 155.0 ccm (9.46 cubic inches) of actual displacement before 11.6:1 compression. Fueling is metered via Injection allowing this machine to produce its 16.5 HP (12.0 kW) @ 10000 RPM horsepower and 14.3 Nm (1.5 kgf-m or 10.5 ft.lbs) @ 6500 RPM torque. According to our records engine heat of the Yamaha WR155R is moderated by Liquid. 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 2.75-21 and the rear is 4.10-18 . The entire package is supported by the frame, Steel double cradle. 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 WR155R 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.