style=color: rgb(0. 0. 0); font-family: Times; line-height: normal;>2012 Honda CB250R Key Features Engine / Drivetrain The 249 cc single-cylinder engine has been purpose-built for the CBR250R. and boasts such high-performance features as double overhead camshafts driven by a Hy-Vo-type silent chain. forked roller rocker arms. a compact four-valve cylinder head. a counterbalance shaft. and liquid cooling.. The light and compact engine contributes to the CBR250R? s nimble steering. intuitive handling and impressive power-to-weight ratio. which allows it to outperform twin-cylinder bikes of similar displacement.. 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.. The engine countershaft sits lower than the mainshaft in a ? stacked? formation ...
