It appears you're interested in specifications for the Yamaha Bolt R-Spec. This Custom / cruiser model is powered by a V2, four-stroke engine with 942.0 ccm (57.48 cubic inches) of actual displacement before 9.0:1 compression. Fueling is metered via Injection allowing this machine to produce its horsepower and 80.4 Nm (8.2 kgf-m or 59.3 ft.lbs) @ 3000 RPM torque. According to our records engine heat of the Yamaha Bolt R-Spec is moderated by Air. You'll need to get familiar with the 5-speed transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 100/90-19 and the rear is 150/80-16 . The entire package is supported by the frame, Aluminum 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. Wave-type disc front brakes and Single disc. Wave-type disc rear brakes. The Yamaha Bolt R-Spec 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.