Complex sentence: The engine has dry sump lubrication, which is generally regarded as a better system for motorcycles than wet sump; but an unusual feature is that the oil tank is not remote, but is integral to the engine, sitting atop the gearbox.
Split into simpler sentences: The engine has dry sump lubrication, which is generally regarded as a better system for motorcycles than wet sump. Unusually, the oil tank is not remote, but is integral to the engine, sitting atop the gearbox.