It appears you're interested in specifications for the Yamaha XS 750 US. Custom. This Custom / cruiser model is powered by a In-line three, four-stroke engine with 747.00 ccm (45.58 cubic inches) of actual displacement before 9.2:1 compression. Fueling is metered via allowing this machine to produce its 69.00 HP (50.4 kW) horsepower and torque. According to our records engine heat of the Yamaha XS 750 US. Custom is moderated by Air. You'll need to get familiar with the 5-speed transmission and pay attention to final drive Shaft drive (cardan) maintainence. Our best information shows that the front tire size is 3.25-19 and the rear is 4.00-18 . 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 Dual disc front brakes and Single disc rear brakes. The Yamaha XS 750 US. Custom was launched in 1980, 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.