Valves are apportioned per cylinder of the engine. The engine in the Honda XR250RF is a four-stroke, single-cylinder, air-cooled engine that has a compression ratio of 10.2-to-1.
The valve configuration in the Honda XR250RF is a single overhead cam design, meaning the engine only possess one camshaft to perform all of the action.
The Honda XR250RF has four valves in its single cylinder.