
Motorcycle trials, also known as observed trials, is a non-speed event on specialized motorcycles. The sport is most popular in the United Kingdom and Spain, though there are participants around the globe.

Aprilia is an Italian motorcycle manufacturer founded immediately after World War II in Noale, Italy by Alberto Beggio. The company started as a manufacturer of bicycles and moved on to manufacture scooters and small-capacity motorcycles. In more recent times Aprilia has produced large sportbikes such as the 1,000 cc V-twin RSV Mille and the V4 RSV4.

Beta is an Italian motorcycle manufacturer, specialising in off-road motorcycles. Beta are best known for their popular trials bikes. In 2005, they launched a range of enduro motorcycles using KTM engines. In 2010 they launched the new RR series, with a new engine made in-house. Beta motorcycles have been used by world trials champions such as Jordi Tarrés, Dougie Lampkin, Albert Cabestany and Enduro riders Steve Holcombe and Brad Freeman. Production in 2018 was expected to be in excess of 20,000 motorcycles, ranging in size from 50 cc to 480 cc.

Bultaco was a Spanish manufacturer of two-stroke motorcycles from 1958 to 1983. In May 2014, a new Bultaco was announced.

FIM Europe is the FIM-affiliated organisation responsible for Motorcycle sport within Europe.

Gas Gas is a Spanish motorcycle manufacturer established in 1985 by Narcìs Casas and Josep Pibernat in Salt, Girona. The company specializes in off-road motorcycles for trials and enduro competitions. Gas Gas was purchased by KTM motorcycles in 2019.

Gimson was a Spanish bicycle and motorcycle brand, manufactured in Figueres by Gimbernat Hermanos S.R.C. in two distinct stages: the first in 1930 and the second from 1955 to 1982.

Montesa Honda is the Spanish subsidiary of Honda, which assembles several models of motorcycles, bicycles and parts at its Barcelona plant. The company exports 75 percent of its production to Europe.

The FIM Trial World Championship and FIM X-Trial World Championship are the most prestigious motorcycle trials tournaments of the world, organised by the Fédération Internationale de Motocyclisme. The outdoor championship is held since 1964 and the indoor (X-Trial) since 1993.

The North American Trials Council Championship is the official US National Trials Championship and has been held since 1974.
Ossa was a Spanish motorcycle manufacturer which was active from 1924 to 1982 and from 2010 to 2015. Founded by Manuel Giró, an industrialist from Barcelona, Ossa was best known for lightweight, two-stroke-engined bikes used in observed trials, motocross and enduro. The company was known originally as Orpheo Sincronic Sociedad Anónima (O.S.S.A.) and was later renamed Maquinaria Cinematográfica, S.A..
The Scott Trial is a British motorcycle trials competition dating from 1914 run over an off-road course of approximately 70 miles. One of the most challenging trials events in the UK, its appeal is to clubman riders as well as international professional riders. The Scott raises money for the "Scott charities", a range of local non-profit making organisations.

Sherco is a French motorcycle manufacturer, specialising in off-road motorbikes. Sherco are best known for their extremely popular trials bikes, although they also make enduro and supermoto bikes.

SV.VM was an Italian motorcycle manufacturer founded in 1971 by Piero Sironi and Fausto Vergani. Based in Milan, Italy, SWM manufactured Observed Trials, Enduro, Motocross and off-road motorcycles in the 1970s and 1980s. They started with small capacity Sachs engined enduro bikes and began making Rotax engined trials bikes in 1977. The other main manufacturers at this time included Fantic Motor, Bultaco and Montesa. Making the announcement during EICMA 2014 show in Milan, SWM are back on the market by introducing six street and off-road bikes with engine size between 300 and 650cc.

Zündapp was a major German motorcycle manufacturer founded in 1917 in Nuremberg by Fritz Neumeyer, together with the Friedrich Krupp AG and the machine tool manufacturer Thiel under the name "Zünder- und Apparatebau G.m.b.H." as a producer of detonators. In 1919, as the demand for weapons parts declined after World War I, Neumeyer became the sole proprietor of the company, and two years later he diversified into the construction of motorcycles.