It appears you're interested in specifications for the Yamaha XJ 650 Maxim. This Custom / cruiser model is powered by a In-line four, four-stroke engine with 650.00 ccm (39.66 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor. YICS, Mikuni CV allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha XJ 650 Maxim 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 -19 and the rear is 130/90-16 . The entire package is supported by the frame, Steel tubing. 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 single-piston front brakes and Expanding brake (drum brake). Mechanical actuator rear brakes. The Yamaha XJ 650 Maxim 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.