[custom_adv] Motorsport or motor sport is a global term used to encompass the group of competitive sporting events which primarily involve the use of motorised vehicles, whether for racing or non-racing competition. [custom_adv] The terminology can also be used to describe forms of competition of two-wheeled motorised vehicles under the banner of motorcycle racing, and includes off-road racing such as motocross. [custom_adv] The terminology can also be used to describe forms of competition of two-wheeled motorised vehicles under the banner of motorcycle racing, and includes off-road racing such as motocross. [custom_adv] Motorcycle racing (also called moto racing and motorbike racing) is the motorcycle sport of racing motorcycles. Major genres include motorcycle road racing and off-road racing, both either on circuits or open courses, and track racing. [custom_adv] Road racing is a form of motorcycle racing held on a paved road surfaces. The races can be held either on a purpose-built closed circuit or on a street circuit utilizing temporarily closed public roads. [custom_adv] Historically, "road racing" meant a course on closed public roads. This was once commonplace but currently only a few such circuits have survived, mostly in Europe. [custom_adv] Superbike racing is the category of motorcycle road racing that employs modified production motorcycles. Superbike racing motorcycles must have four stroke engines of between 800 cc and 1200 cc for twins, and between 750 cc and 1000 cc for four cylinder machines. [custom_adv] Motorsport or motor sport is a global term used to encompass the group of competitive sporting events which primarily involve the use of motorised vehicles, whether for racing or non-racing competition. [custom_adv] The terminology can also be used to describe forms of competition of two-wheeled motorised vehicles under the banner of motorcycle racing, and includes off-road racing such as motocross. [custom_adv] The overall appearance, seen from the front, rear and sides, must correspond to that of the bike homologated for use on public roads even though the mechanical elements of the machine have been modified.