A vehicle comprising a seat defining a driver seat portion and a passenger seat portion, an electronic stability system, adapted to receive inputs from a load sensor, a wheel rotation sensor and a lateral acceleration sensor, the electronic stability system adapted to provide outputs to at least one of the brake system for braking the vehicle, and the engine control unit to change the power output transmitted to the wheels by the engine, the electronic stability system using a first calibration to determine the outputs when the load sensor is in a non-loaded state and a second calibration to determine the outputs when the load sensor is in a loaded state.