[custom_adv] Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom. [custom_adv] Some say the first motorcycle race was flagged off the moment a second motorcycle rolled down the assembly line and riders have been battling hammer and tongs ever since that seminal moment. [custom_adv] Whether that account is actually true is irrelevant because motorcycle racing is ever evolving, with new models and rules changes spawning disciplines spanning the past century as specific and unique as the very machines homologated for use in domestic and international competition. [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] A motorcycle, often called a bike, motorbike, or cycle, is a two- or three-wheeled motor vehicle. Motorcycle design varies greatly to suit a range of different purposes: long distance travel, commuting, cruising, sport including racing, and off-road riding. [custom_adv] Motorcycling is riding a motorcycle and related social activity such as joining a motorcycle club and attending motorcycle rallies. [custom_adv] In developing countries, motorcycles are considered utilitarian due to lower prices and greater fuel economy. Of all the motorcycles in the world, 58% are in the Asia-Pacific and Southern and Eastern Asia regions, excluding car-centric Japan.