The CB500 trio-made up of the fully faired CBR500R, naked CB500F, and adventure-themed CB500X-are virtually identical under the skin yet are the "game changers" for Honda this year. A fresh parallel-twin engine features a 180-degree crank configuration and a counterbalancer to quell vibration. Fuel injected and liquid cooled, the mill's twin cams bear down on eight valves through rocker arms (and shim adjustment), an arrangement similar to the CBR250R's designed for low cost and simplified maintenance. The nearly square bore/stroke dimensions (67mm bore, 66.8mm stroke) and modest 10.7:1 compression ratio suggest an engine designed for a broad torque curve rather than peak horsepower. Honda did not release power figures, but 45-48 bhp seems a reasonable estimate. Drive comes via a wet clutch, six-speed transmission, and an O-ring chain.