2018 Honda® CBR® 300R ABS Aggressive styling, approachable performance Features may include: Engine & Drivetrain High performance The 286 cc single-cylinder engine boasts dual overhead camshafts driven by a Hy-Vo-type silent chain, forked roller rocker arms, a compact four-valve cylinder head, a counterbalance shaft for smoothness, and liquid cooling for optimum performance and durability. Light & compact The light and compact engine contributes to the CBR300R’s impressive power-to-weight ratio, allowing it to compete with twin-cylinder bikes of similar displacement. Easy inspection & maintenance Shim-style valve adjustment allows easy inspection and maintenance, although with a recommended inspection interval of 48,000 km, you’ll ride a long, long time between any needed adjustments. Stacked design The engine countershaft sits lower than the mainshaft in a “stacked” formation to reduce the engine’s front-to-rear dimensions. Easy city or highway ride The engine produces a remarkably broad torque curve for strong low-rpm performance, and peak horsepower kicks in at 8,500 rpm - well below redline. This wide spread of power makes the CBR300R easy and confidence-inspiring to ride, in both stop-and-go situations and on the highway, while also returning impressive fuel economy. High-performance engine The crankshaft runs in plain bearings for quieter operation and the big end of the connecting rod spins in a needle bearing, both contributing to the engine’s high-performance credentials. Enhanced rider comfort A gear-driven counterbalance shaft helps quell engine vibration for enhanced rider comfort. It’s located so close to the crankshaft that the balancer weight passes between the two crank weights to keep the engine as compact as possible while improving mass centralization. Quick acceleration for an edge The six-speed transmission works in concert with the engine’s broad power delivery to produce quick acceleration plus excellent fuel economy during highway cruising. Final drive gearing is also taller than the previous model (CBR250R) to further improve efficiency at highway speeds.