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AJS 7R
The AJS 7R was a British 350 cc racing motorcycle built from 1948 to 1963 by Associated Motor Cycles. It was also commonly known as the ‘Boy Racer’, and won victories both for the factory and for privateers right from its introduction in 1948. The AJS 7R A new design by Phil Walker, the chain-driven overhead camshaft 7R had the history of the pre-war AJS ‘cammy’ singles behind it. Initially, the 7R was not quite as powerful as its competitors, producing at 7500 rpm. The duplex frame and Teledraulic front forks remained relatively unchanged during production, while the engine had a number of changes. The included valve angle was progressively narrowed, and the crankshaft strengthened. In 1956 the engine dimensions changed from the original long-stroke 74 x 81 mm to the ‘squarer’ 75.5 x 78 mm. The AMC gearbox replaced the older Burman unit in 1958. AJS 7R3 In 1951 AJS development engineer Ike Hatch developed a 75.5 mm bore x 78 mm stroke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Racing
Road racing is a form of motorsport racing held on a paved road surface. The races can be held either on a closed circuit or on a street circuit utilizing temporarily closed public roads. Originally, road races were held almost entirely on public roads. However, public safety concerns eventually led to most races being held on purpose-built racing circuits. Road racing's origins were centered in Western Europe and Great Britain as motor vehicles became more common in the early 20th century. After the Second World War, automobile road races were organized into a series called the Formula One world championship sanctioned by the Fédération Internationale de l'Automobile (FIA), while motorcycle road races were organized into the Grand Prix motorcycle racing series and sanctioned by the Fédération Internationale de Motocyclisme (FIM). The success and popularity of road racing has seen the sport spread across the globe with Grand Prix road races having been held on six continents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorcycle
A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising, sport (including racing), and off-road riding. Motorcycling is riding a motorcycle and being involved in other related social activity such as joining a motorcycle club and attending motorcycle rallies. The 1885 Daimler Reitwagen made by Gottlieb Daimler and Wilhelm Maybach in Germany was the first internal combustion, petroleum-fueled motorcycle. In 1894, Hildebrand & Wolfmüller became the first series production motorcycle. Globally, motorcycles are comparably popular to cars as a method of transport. In 2021, approximately 58.6 million new motorcycles were sold around the world, fewer than the 66.7 million cars sold over the same period. In 2014, the three top motorcycle producers globally by volume were Honda (28%), Yamaha (17 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Associated Motor Cycles
Associated Motor Cycles (AMC) was a British motorcycle manufacturer founded by the Collier brothers as a parent company for the Matchless and AJS motorcycle companies. It later absorbed Francis-Barnett, James, and Norton before incorporation into Norton-Villiers. Henry Herbert Collier founded Matchless as a cycle company in 1878. His sons Henry (Harry) and Charles (Charlie) joined him and the name was changed to H. Collier & Sons. History AJS had been bought by Matchless's owners, the Colliers, in 1931 and Sunbeam was added in 1937 from Imperial Chemical Industries. The name of the Matchless Motor Cycles company was changed to "Amalgamated Motor Cycles Ltd" in 1937 and "Associated Motor Cycles (AMC)" in 1938. AMC was not a manufacturer in its own right, but rather the parent company of a group of motorcycle manufacturers which included Matchless, AJS, Norton, James, Francis-Barnett, Sunbeam and others. In 1939 a 495 cc AJS V4 was built to compete against the supercharged ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crankshaft
A crankshaft is a mechanical component used in a piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating shaft containing one or more crankpins, that are driven by the pistons via the connecting rods. The crankpins are also called ''rod bearing journals'', and they rotate within the "big end" of the connecting rods. Most modern crankshafts are located in the engine block. They are made from steel or cast iron, using either a forging, casting or machining process. Design The crankshaft located within the engine block, held in place via main bearings which allow the crankshaft to rotate within the block. The up-down motion of each piston is transferred to the crankshaft via connecting rods. A flywheel is often attached to one end of the crankshaft, in order to smoothen the power delivery and reduce vibration. A crankshaft is subjected to enormous stresses, in some cases more than per cylinder. Crankshafts for single-cylin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gearbox
Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differential, and final drive shafts. In the United States the term is sometimes used in casual speech to refer more specifically to the gearbox alone, and detailed usage differs. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted. Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as the speed varies. This switching may be done manually (by the operator) or automatically (by a control unit). Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burman And Sons Ltd
Burman and Sons Ltd, of Ryland Road, Birmingham, West Midlands, manufactured Burman-Douglas steering gear. Their worm and nut design of steering gear was fitted to pre-war vehicles such as the Ford Eight and the Ford Prefect, the Bedford CA, plus heavy trucks and off-road vehicles - both pre and post-war. In its day, Burman-Douglas steering-gear was regarded as...''... a "quality" feature of a car chassis specification'', but the worm and nut design was eventually surpassed by the more direct rack and pinion A rack and pinion is a type of linear actuator that comprises a circular gear (the '' pinion'') engaging a linear gear (the ''rack''). Together, they convert rotational motion into linear motion. Rotating the pinion causes the rack to be driven ... design which dominates today. The company also manufactured motorcycle gearboxes during part of its history.http://www.barkshire.co.uk/bikes/Literature/Generic/Burman1926Sales/Burman1926_01.jpg References Automotive com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Man TT
The Isle of Man TT or Tourist Trophy races are an annual motorcycle racing event run on the Isle of Man in May/June of most years since its inaugural race in 1907. The event is often called one of the most dangerous racing events in the world as many competitors have died. Overview The Isle of Man TT is run in a time-trial format on public roads closed to the public by an Act of Tynwald (the parliament of the Isle of Man). The event consists of one week of practice sessions followed by one week of racing. It has been a tradition, perhaps started by racing competitors in the early 1920s, for spectators to tour the Snaefell Mountain Course on motorcycles during the Isle of Man TT on Mad Sunday, an informal and unofficial sanctioned event held on the Sunday between Practice Week and Race Week. The first Isle of Man TT race was held on Tuesday 28 May 1907 and was called the International Auto-Cycle Tourist Trophy. The event was organised by the Auto-Cycle Club over 10 laps o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matchless G50
The Matchless G50 is an historic racing British motorcycle made by Associated Motorcycles (AMC) at the former Matchless works in Plumstead, London. Developed in 1958 from the 350 cc AJS 7R, but with the engine capacity increased to 500 cc, 180 G50s were built in the next four years. Although less powerful than its main competitor the Norton Manx the G50 proved highly competitive at three hundred pounds and was faster round bends. If success is measured by longevity then this is the most successful Matchless motorcycle, and high specification replicas are still being produced to this day, although financial problems at AMC ended production in 1963. The G50 CSR In 1963, the AMA decided that the G50 should not be allowed to race in the USA as it was not based on a production street bike. Matchless solved the problem by creating a limited-production, street-legal G50 CSR, by fitting the G50 engine into the G80CS Scrambler frame. The designation "CSR" "In AMC parlance stoo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bill Nilsson
Bill Nilsson (17 December 1932 – 25 August 2013) was a Swedish professional motocross racer. He competed in the Motocross World Championships from 1952 to 1967. Nilsson was the first 500 cc motocross world champion after winning the inaugural 1957 championship sanctioned by the Fédération Internationale de Motocyclisme. Career Nilsson was born in Hallstavik, Sweden. In the 1955 European motocross championship, Nilsson finished in second place, one point behind his BSA teammate John Draper. Nilsson converted an AJS 7R road racing machine into a motocross bike and rode it to win the inaugural F.I.M. 500 cc Motocross World Championship held in 1957. Nilsson finished second to René Baeten in the 1958 world championship and second to Sten Lundin in the 1959 world championship before repeating as 500cc motocross world champion in 1960 riding a Husqvarna. In 1955, 1958 and 1961, he was a member of the Swedish teams that won the Motocross des Nations The Motocross ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motocross
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. History Motocross first evolved in Britain from motorcycle trials competitions, such as the Auto-Cycle Clubs's first quarterly trial in 1909 and the Scottish Six Days Trial that began in 1912. When organisers dispensed with delicate balancing and strict scoring of trials in favour of a race to become the fastest rider to the finish, the activity became known as "hare scrambles", said to have originated in the phrase, "a rare old scramble" describing one such early race. Though known as scrambles racing (or just scrambles) in the United Kingdom, the sport grew in popularity and the competitions became known internationally as "motocross racing", by combining the French word for motorcycle, ''motocyclette'', or ''moto'' for short, into a portmanteau with "cross country". The first known scramble race took place ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fédération Internationale De Motocyclisme
The Fédération Internationale de Motocyclisme (FIM; en, International Motorcycling Federation) is the global governing/sanctioning body of motorcycle racing. It represents 116 national motorcycle federations that are divided into six regional continental unions. There are seven motorcycle-racing disciplines that FIM covers, encompassing 82 world championships as well as hundreds of secondary championships: enduro, trial, circuit racing, motocross and supermoto, cross-country, e-bike, and track racing. FIM is also involved in many non-racing activities that promote the sport, its safety, and support relevant public policy. The FIM is also the first international sporting federation to publish an Environmental Code, in 1994. In 2007, a Commission for Women in Motorcycling was created by the FIM in order to promote the use of powered two-wheelers and the motorcycle sport among women. History The FIM was born from the ''Fédération Internationale des Clubs Motocyclistes'' (FI ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Motocross World Championship Results
FIM Motocross World Championship is the premier championship of motocross racing, organized by the Fédération Internationale de Motocyclisme (FIM), divided into two distinct classes: MXGP and MX2. Race duration is 30 minutes plus two laps per race. The series runs 18 events with two races per class at each round. History The FIM Motocross World Championship is a worldwide motocross series sanctioned by the F.I.M. It was inaugurated in 1957 using a 500 cc engine displacement formula. In 1962 a 250cc class was added and in 1975, a 125cc class was introduced. Prior to 1957, the championship was known as the European Championship. In 2004, the F.I.M. changed the displacement formulas to reflect the changes in engine technology and as a move towards environmentally friendlier four-stroke engines. The new MX1 class became the premier class, allowing two-stroke engines of up to 250cc and four-stroke engines of up to 450cc. The MX2 class allowed two-stroke engines of up to 125cc a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
