21-532: B50 or B-50 may refer to: B-50 Superfortress , an airplane BSA B50 , 500cc motorcycle International Statistical Classification of Diseases and Related Health Problems (ICD-10), code for Plasmodium falciparum malaria Leyland Royal Tiger , a UK bus Sicilian Defence , an Encyclopaedia of Chess Openings code A Vietnamese RPG-2 rocket-propelled grenade launcher B-50, alias of Gap-43 protein HLA-B50 ,
42-661: A HLA-B serotype Bestune B50 , a compact sedan [REDACTED] Topics referred to by the same term This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=B50&oldid=1228263887 " Category : Letter–number combination disambiguation pages Hidden categories: Short description matches Wikidata All article disambiguation pages All disambiguation pages BSA B50 The BSA B50
63-516: A few prototype P92 models. This model comprised a B50 engine in a BSA Fury / Triumph Bandit frame using Isolastic mountings from the Norton Commando . The US DOT had mandated that all motorcycles sold in the US should have a left hand gear change. The B50 had the gear lever on the right, so to comply with this requirement, the engine was tilted forward in the frame and a gear linkage run under
84-439: A single removable 'pod'. BSA kept production costs down by using parts across a range of models, launched in 1971. About 5,700 were built. Some B50s were modified for off-road use by specialist builders such as Eric Cheney . B50 bikes were successful in both road-racing and off-road events. A modestly modified B50 Gold Star 500 entered by Mead & Tomkinson of Hereford, England and ridden by Nigel Rollason and Clive Brown won
105-706: A variety of engine suppliers including Rotax , Suzuki and Kymco . Alan Clews was a successful Trials and Scrambles competitor in the late 1960s. He wanted a lighter, more nimble and modern motocross bike, like the custom-built 500 cc motorcycles used by the BSA factory racing team. When the BSA Competition Department was disbanded in 1971, he saw his opportunity and bought all the factory parts that were available. Clews started building motocross bikes in his garage. Having no access to BSA works engines, Clews made his own extensive improvements to
126-505: Is now built by Kymco in Taiwan. The CCM has received very favourable comments on its lightness, the engine's responsiveness, and the excellent handling both on- and off-road. The factory team of 11 workers is currently producing eight bikes per week. 2016 saw an "RS" version produced which had 17" wheels instead of the standard 21/18" setup. Production of the GP450 ceased in 2017 due to
147-716: The 500cc class in both the Thruxton 500 miler and the Barcelona 24 hours ( at the Montjuïc circuit ), and won the Zolder 24-hour race outright. Also, a B50 fielded by Mead & Tomkinson once held the class lap record in the Production Isle of Man TT . After the demise of BSA, Alan Clews bought up remaining B50 part stocks and set up Clews Competition Motorcycles , producing successful CCM motocross bikes based on
168-608: The B50. The BSA B50SS 'street scrambler' Gold Star was designed for road use and was partly aimed at the US market and proved its credentials by winning the 500cc class in the Thruxton 500 miler and the Barcelona 24-hour endurance race. Trail version The B50T was specifically designed with the fast-growing trail riding boom in mind in the US, with the bike using many parts common to both
189-627: The Italian SWM XN Tornado, to which Armstrong acquired the rights in 1984 when SWM liquidated, and Armstrong modified it for military use. Harley-Davidson bought the production rights to the MT-500 in 1987 when NATO chose the machine, and created a 350 cc version that reduced weight, added an electric start, and upgrading pollution standards, which was named the Harley-Davidson MT350E . The CCM company
210-535: The SS and MX versions. The B50MX was designed for off-road competition and produced between 1971 and 1973. The very last MX's produced were therefore coming off the production line after the demise of BSA and were 'badged' as the Triumph TR5MX. In an attempt to make new models from existing BSA/Triumph parts, a Triumph T100C engine was fitted into modified B50 cycle parts. Launched in late 1972 (1973 model year),
231-571: The firm used Rotax engines during the 1980s and 1990s when production reached a peak of 3,500 annually. Between 1983 and 1985, over 4,000 CCM motorcycles were licensed to export bikes to North America badged as Can-Am motorcycles . In 1984, the firm secured a contract to produce the Rotax-engined Armstrong MT500 bikes for the British Army , and through overseas sales won a Queen's Export Award. The MT500 began as
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#1732773370387252-457: The first bikes rolled off the production line in November 2014. The GP450 is very light at 125kg (dry), which is 98kg lighter than the popular BMW R1200GS Adventure. The GP450 has a frame of " Bond-Lite " aluminium, which CCM claim as a world first. The bought-in engine is a BMW 450cc 4-stroke single, detuned from 51hp to 41hp. Originally used in the discontinued BMW GP450X, the 450cc engine
273-503: The gearbox to provide a left hand gear change. The model never progressed to production. Specialist motorcycle designer Gerald Fitzpatrick created a 1000 cc BSA V-twin using parts from two B50 engines in 1977. The frame was a slimline featherbed Norton Atlas . Triumph considered putting the B100 into production but were not able to finance re-tooling costs. The B100 prototype was ridden for two years and has been stored since but
294-421: The military once again, with a contract of 1500 motorcycles, however CCM weren't just content with military sales, they went on to secure their first ACU British Indoor Motocross Championship with Tom Church on board a CCM. In 2013 CCM announced plans for a GP450 machine to meet a market demand for a road legal middleweight adventure bike . A prototype was made available to journalists for testing in 2014, and
315-712: The new model was called the Triumph Adventurer in the UK and the Trophy Trail in the US, where most of the machines were sold on the East Coast. The model used Lucas electrics, Nippon Denso Speedo and rev counter and handlebar switches from Yamaha . Production continued into 1974, after which the model was dropped. A British team finished second in the 1973 IDST on these machines. As part of an attempt to produce new models from existing parts, NVT produced
336-457: The replacement of Euro 3 with Euro 4 emission standards and the engine not being able to meet the stricter certification standards. Due to the Euro 4 emissions standards the GP450 was phased out since the engine was not compliant with this regulation. A group of CCM employees set about designing a new machine which was to be hand welded from T45 carbon steel and covered with a clear lacquer enabling
357-484: The standard BSA B50 500 cc engine, obtained by breaking up B50 MX bikes. His reputation grew as a builder of four-stroke motocross bikes that were capable of competing with the dominant two-stroke bikes. In the mid-1970s, the CCM racing team achieved respectable results in the 500 cc Motocross World Championship , with rider John Banks placing in the top five several times. Initially powered by BSA engines,
378-596: Was a single-cylinder 499 cc (30.5 cu in) ohv motorcycle , produced by BSA at their factory in Small Heath , Birmingham . The last of the big capacity unit-construction singles from the Birmingham Small Arms company , it had an alloy engine with a bore of 84 mm (3.3 in) and a stroke of 90 mm (3.5 in). As well as the road version, special models were produced for off-road competition use. BSA's earlier 500cc single
399-637: Was acquired by the Robson family in 1998 who procured Suzuki DR-Z400 engines. In 2004, the company ceased operations and its assets were bought back by the original owner, Alan Clews. In 2005 the company launched two new bikes, the R35 Supermoto and the FT35 flat tracker. The firm returned to world champion competition, fielding a team in the 2009 FIM Motocross World Championship with riders Tom Church, Jason Dougan and Ray Rowson. 2010 saw CCM working with
420-539: Was featured in the magazine British Bike Mechanics in April 1978 and January 1988. Clews Competition Motorcycles Clews Competition Machines ( CCM ) is a British motorcycle manufacturer based in Bolton , England. CCM was founded in 1971 by Alan Clews and gained notability for producing specialised BSA powered motocross machines. The company has produced a variety of motorcycle models over its history using
441-581: Was the BSA Gold Star , a pre-unit machine with a duplex frame similar to that of the Golden Flash twin . The Gold Star was not considered suitable for the progression to unit construction . The name was revived when the 250 cc BSA C15/Starfire was eventually developed into the 500 cc B50 (via the B40 & B44 ). The dry sump B50 included features such as "oil in the frame" and the electrics in
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