It appears you're interested in specifications for the Kawasaki Zephyr 550. This Naked bike model is powered by a In-line four, four-stroke engine with 553.00 ccm (33.74 cubic inches) of actual displacement before 9.5:1 compression. Fueling is metered via allowing this machine to produce its 50.00 HP (36.5 kW) horsepower and 40.00 Nm (4.1 kgf-m or 29.5 ft.lbs) torque. According to our records engine heat of the Kawasaki Zephyr 550 is moderated by Air. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 110/80-17 and the rear is 140/70-18 . 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 Kawasaki Zephyr 550 was launched in 1999, 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.