It appears you're interested in specifications for the Yamaha XJ 900 F. This Enduro / offroad model is powered by a In-line four, four-stroke engine with 891.00 ccm (54.37 cubic inches) of actual displacement before 9.6:1 compression. Fueling is metered via allowing this machine to produce its 98.00 HP (71.5 kW) horsepower and torque. According to our records engine heat of the Yamaha XJ 900 F 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 100/90-18 and the rear is 120/90-18 . 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 XJ 900 F was launched in 1985, 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.