1950 BSA ZB34 Cafe Racer

1950 BSA ZB34 Single Cylinder Custom Cafe Racer. Hand made by Rick Booth

1950 BSA  ZB34 Cafe Racer 

1950 BSA  ZB34 Cafe Racer 

1950 BSA  ZB34 Cafe Racer 




Wow, this would have to be one of the most radical BSA 500′s I’ve ever seen! In the owners words;

1950 BSA  ZB34 Cafe Racer 

1950 BSA  ZB34 Cafe Racer 

1950 BSA  ZB34 Cafe Racer 



“This bike started our a 1950 BSA -ZB34 …all that’s left is the crank,barrel and trans, the rest I made except for the tires, rubber is hard to work with…it’s been in a few shows a usually gets attention wherever I show it ….”I’d certainly stop and take a close look…very impressive indeed.

Found on SUPA CUSTOM

1952 BSA MC1 RACER

Simply coded MC1, BSA’s prototype 250cc racer of the early Fifties bristleswith progressive technical features. Its engine has a near-horizontal single cylinder with twin carburettors and four radial valves operated by two bevel-driven overhead camshafts. The whole machine is low-slung and extremely compact, even with a huge seven-gollon fuel tank. The steering head layout for the leading-link front fork is unconventional and the monoshock rear suspension predated its widespread adoption in racing by 30 years.

The radical MC1 was created by two of the postwar British Industry’s best-known engineers, Bert Hopwood and Doug Hele. In 1950, Hopwood, then BSA’s chief designer, sjetched out a high-performance 250cc single. His aim was to meet the challenge of Continental products and to lay foundations for a new generation of larger BSA sports models. Hopwood passed the project to his assistant Hele, giving him free rein to finalise design and conduct a development programme.

Three engines were built and aprototype lapped the Motor Industry Research Association’s banked test track at 104mph without streamlining. Reigning 500cc champion Geoff Duke took interest in the project and was given a test ride in the winter of 1954. He was greatly impressed by the MC1 and his association with it led to fevered speculation that BSA was about to enter the international racing arena.

Knowing that BSA bosses would expect nothing less than total success, Hopwood veoted a road racing programme because he felt the machine was insufficiently developed to guarantee victory in the Isle of Man TT. He saw the MC1 as the basis for advances sports roadsters but sadly, the company’s senior management did not share his vision.

Engine – 248cc (70 x 64.5mm) aur-cooled ohc four-valve single, 10:1 compression ratio, two Amal carburettors
Transmission – Chaion primary drive, dry multiplate clutch, four-speed gearbox, chain final drive
Chassis – Tubular double cradle frame, leading-link front suspension,monoshock rear suspension, drum brakes
Power – 32bhp @ 10,250rpm
Dry weight – 248lb (112kg)
Top Speed – 110mph
Via : National Motorcycle Museum in Birmingham.
 Image:GORDON

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The 1949 BSA B33

motorcycle was developed by one of England‘s oldest motorcycle companies. BSA grew out of a consortium of firearms manufacturers who first expanded into bicycles, then into the fledgling “motor bicycle” market by fitting a stronger frame with a Belgian-made Minerva engine.


That was in 1905; by 1910, Birmingham Small Arms was building its own 30-cubic-inch flat head single, and BSA was on its way to becoming a household name.

 Though the company also built large V-twins for 20 years before World War II, its stock in trade remained midsize singles. These were often available at bargain prices and thus sold in large volume.

 During the war, BSA supplied more than 120,000 of its M20 500-cc flathead singles to Allied forces, where their simple mechanicals made them reliable and easy to repair.

While contests of speed were typically won by other makes, BSAs had more than their share of success in endurance races, furthering their reputation for toughness that carried far more appeal to the everyday rider.



Typical of early postwar BSAs is the B33, which arrived in 1947 with a 500-cc (30-cubic-inch) overhead-valve single. Simple and stout, it formed the basis for a series of similar machines that carried on through the 1950s.
Modern telescopic forks were used in front, but early versions had a rigid frame and thus no rear suspension save for the sprung saddle.
Vertical twins joined the line after the war and became legends in their own right. And adding those to an early-1950s selection of popular small- to large-displacement singles briefly made BSA the largest motorcycle company in the world.
See the next page for a variety of pictures of the 1949 BSA B33 motorcycle.

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Black Out Of English-language Wikipedia for 24 hours -protesting SOPA/PIPA

To: 
English Wikipedia Readers and Community
Image representing Wikipedia as depicted in Cr...Image via CrunchBase





From: 
Sue Gardner
Executive Director
Wikimedia Foundation
Date: January 16, 2012


Today, the Wikipedia community announced its decision to black out the English-language Wikipedia for 24 hours, worldwide, beginning at 05:00 UTC on Wednesday, January 18 (you can read the statement from the Wikimedia Foundation here). The blackout is a protest against proposed legislation in the United States—theStop Online Piracy Act (SOPA) in the U.S. House of Representatives, and the PROTECTIP Act (PIPA) in the U.S. Senate—that, if passed, would seriously damage the free and open Internet, including Wikipedia.


This will be the first time the English Wikipedia has ever staged a public protest of this nature, and it’s a decision that wasn’t lightly made. Here’s how it’s been described by the three Wikipedia administrators who formally facilitated the community’s discussion. From the public statement, signed by User:NuclearWarfare, User:Risker and User:Billinghurst:It is the opinion of the English Wikipedia community that both of these bills, if passed, would be devastating to the free and open web.Over the course of the past 72 hours, over 1800 Wikipedians have joined together to discuss proposed actions that the community might wish to take against SOPA and PIPA. This is by far the largest level of participation in a community discussion ever seen on Wikipedia, which illustrates the level of concern that Wikipedians feel about this proposed legislation. The overwhelming majority of participants support community action to encourage greater public action in response to these two bills. Of the proposals considered by Wikipedians, those that would result in a “blackout” of the English Wikipedia, in concert with similar blackouts on other websites opposed to SOPA and PIPA, received the strongest support.On careful review of this discussion, the closing administrators note the broad-based support for action from Wikipedians around the world, not just from within the United States. The primary objection to a global blackout came from those who preferred that the blackout be limited to readers from the United States, with the rest of the world seeing a simple banner notice instead. We also noted that roughly 55% of those supporting a blackout preferred that it be a global one, with many pointing to concerns about similar legislation in other nations.


In making this decision, Wikipedians will be criticized for seeming to abandon neutrality to take a political position. That’s a real, legitimate issue. We want people to trust Wikipedia, not worry that it is trying to propagandize them.


But although Wikipedia’s articles are neutral, its existence is not. As Wikimedia Foundation board member Kat Walsh wrote on one of our mailing lists recently,We depend on a legal infrastructure that makes it possible for us to operate. And we depend on a legal infrastructure that also allows other sites to host user-contributed material, both information and expression. For the most part, Wikimedia projects are organizing and summarizing and collecting the world’s knowledge. We’re putting it in context, and showing people how to make to sense of it.But that knowledge has to be published somewhere for anyone to find and use it. Where it can be censored without due process, it hurts the speaker, the public, and Wikimedia. Where you can only speak if you have sufficient resources to fight legal challenges, or, if your views are pre-approved by someone who does, the same narrow set of ideas already popular will continue to be all anyone has meaningful access to.


The decision to shut down the English Wikipedia wasn’t made by me; it was made by editors, through a consensus decision-making process. But I support it.


Like Kat and the rest of the Wikimedia Foundation Board, I have increasingly begun to think of Wikipedia’s public voice, and the goodwill people have for Wikipedia, as a resource that wants to be used for the benefit of the public. Readers trust Wikipedia because they know that despite its faults, Wikipedia’s heart is in the right place. It’s not aiming to monetize their eyeballs or make them believe some particular thing, or sell them a product. Wikipedia has no hidden agenda: it just wants to be helpful.


That’s less true of other sites. Most are commercially motivated: their purpose is to make money. That doesn’t mean they don’t have a desire to make the world a better place—many do!—but it does mean that their positions and actions need to be understood in the context of conflicting interests.


My hope is that when Wikipedia shuts down on January 18, people will understand that we’re doing it for our readers. We support everyone’s right to freedom of thought and freedom of expression. We think everyone should have access to educational material on a wide range of subjects, even if they can’t pay for it. We believe in a free and open Internet where information can be shared without impediment. We believe that new proposed laws like SOPA—and PIPA, and other similar laws under discussion inside and outside the United States—don’t advance the interests of the general public. You can read a very good list of reasons to oppose SOPA and PIPA here, from the Electronic Frontier Foundation.


Why is this a global action, rather than US-only? And why now, if some American legislators appear to be in tactical retreat on SOPA?


The reality is that we don’t think SOPA is going away, and PIPA is still quite active. Moreover, SOPA and PIPA are just indicators of a much broader problem. All around the world, we’re seeing the development of legislation seeking to regulate the Internet in other ways while hurting our online freedoms. Our concern extends beyond SOPA and PIPA: they are just part of the problem. We want the Internet to remain free and open, everywhere, for everyone.


Make your voice heard!





On January 18, we hope you’ll agree with us, and will do what you can to make your own voice heard.


Sue Gardner,
Executive Director, Wikimedia Foundation

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BSA GOLD STAR


BSA Gold Star
From Wikipedia, the free encyclopedia
1956 BSA Gold Star DBD34
1956 BSA Gold Star
Manufacturer
Birmingham Small Arms Company(BSA)
Predecessor
1955 BSA Gold Star DB34
Successor
1971 BSA B50
Class
Clubmans racer
Engine
alloy air cooled ohv 499 cc single cylinder
Transmission
4-speed gearbox with wet multiplate clutch
Wheelbase
56 inches (1,400 mm)
Seat height
30.5 inches (770 mm)
Weight
380 lb (170 kg) (dry)
Fuel capacity
4 imperial gallons (18 l)

Related
BSA B33BSA Rocket Gold Star
The Gold Star is a motorcycle made by BSA from 1938–1963. They were 350 cc and 500 cc single-cylinder four-stroke production motorcycle known for being among the fastest bikes of the 1950s. They were hand built, with many optional performance modifications available, and came from the factory with documented dynamometer test results, allowing the new owner to see the horsepower produced.
Contents 


Origin
In 1937, Wal L. Handley lapped the Brooklands circuit at over 100 mph (160 km/h) on a BSA Empire Star, and was awarded one of the traditional Gold Star pins for the feat. That inspired BSA to produce the BSA Gold Star.The first Gold Star was an M24 model. It had an alloy 496 cc engine, an Electron alloy gearbox, and a light tube frame devoid of sidecar attachment lugs. This model continued up to the start of World War II.
1948 YB32
After the war, the all alloy 348 cc B32 Gold Star was released, with a very large list of optional components. Once ordered the bike was assembled by hand, and the engine bench tested. They were 20 lb (9.1 kg) lighter than the comparable cast iron barrel and head B series single. They were successful in the 350 class from 1949 to 1956. They could be specified in tourer, trials, ISDT, scrambles, racing or Clubmans trim. The YB is taken from the beginning of the engine number – YB is 1948, ZB is 1949.
1949 ZB34
The 499 cc B34 Gold Star had a modified crankshaft and a different design main bearing. The 350 continued. In 1950 both received larger front brakes. In 1952 the 500 gets a new Bert Hopwood design head, and the 350 had a new head of that design the following year.
1953 BB34 and BB32
In 1953, a swingarm duplex frame was introduced, along with an improved gearbox.
1954 CB34 and CB32
An optional CB engine was given more and squarer finning, a stronger crankshaft, a shorter connecting rod, oval flywheels (500), improved valve gear, and an Amal GP carburettor
1955 DB34
The DB Gold Star had an improved oil feed to the crankshaft, and finned front brakes. If the buyer specified Clubman cams and timing, he also received a special silencer. At the end of this year the BB and CB models were discontinued.
1956 DBD34
The 500 cc DBD34 was introduced in 1956, with clip-on handlebars, finned alloy engine, polished tank, 36 mm bell-mouth Amal carburettor and swept-back exhaust. The DBD34 had a 110 mph (180 km/h) top speed.The Gold Star dominated the Isle of Man Clubmans TT that year. Later models had a very high first gear, enabling 60 mph (97 km/h) plus before changing up to second. Production ended in 1963.
End of production
Towards the end the Gold Star was only offered in scrambles, or Clubmans trim. In 1963 Lucas ceased to produce the magneto used in the B series, and that line of singles was ended. Alternator models continued to be sold until 1961 as GB33 used BSA B50 bottom ends in their early specials.
The demise of the Lucas magneto was a prime reason that BSA and Triumph reconfigured their pre-unit-construction parallel twins into engines with integral gearboxes, simultaneously converting the ignition system from magneto to battery & coil. The Gold Star was not considered for progression to unit-construction, and instead the 250 cc BSA C15 was developed (via the B40) into the 500 cc B50. Although the B50 never attained the kudos of the DBD34, a B50 fielded by Mead & Tomkinson once held the class lap record in the Production TT, as well as gaining results at the 24-hour endurance races the Le Mans Bol d’Or and at the Montjuïc circuit in Barcelona












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