It appears you're interested in specifications for the Kawasaki ZR 550B Zephyr. 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 Carburettor allowing this machine to produce its 50.00 HP (36.5 kW) horsepower and torque. According to our records engine heat of the Kawasaki ZR 550B Zephyr is moderated by Oil & 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 and the rear is . 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 front brakes and rear brakes. The Kawasaki ZR 550B Zephyr was launched in 1990, 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.