BSA Motorcycle Models Pre & Post WW11

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Motorcycle Workshop Manuals, Parts Manuals and Instruction Books,
Tee Shirts & Posters

Now available by post from the UK, these classic motorcycle manuals, in total 171 just for BSA's, have been reproduced from the original factory information, therefore they are very detailed & include many technical photos & illustrations to help guide you.

Example : - BSA All 1914 to 29 Shop manual, Hard cover softbound Shop manual (142 pages)

Manuals also for AJS, Norton, Royal Enfield, Triumph, Ariel, etc etc are also available

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Motorcycle CD's from KIM-THE-CD-MAN
The BSA DVD ( 5th Edition - 1 DVD - 70US$ )
This new Edition has 22 new files. Covers some of the 1930's models, the wartime SV's, and almost all models from 1945 to 1973. There is a HUGE Service Sheet section!
The NORTON DVD, ( 5th Edition 1 DVD - 70US$ )
There are twenty NEW files in this edition, including two in the Commando section.
The Triumph DVD ( 5th Edition - 1 DVD - 70US$ )
The Collection covers almost every Triumph model from 1935 to 1985, with Spare Parts Lists, Workshop Manuals, Service Sheets, or technical articles.
The AJS/Matchless CD ( - 1 CD - 70US$ )
Covers a large range of the singles and twins. As with the other CDs, workshop manuals and parts lists will help you restore or maintain your pride and joy. Includes technical data and rebuild information reprinted from rare out-of-print books.
The Lucas + Amal CD ( - 1 CD - 70US$)
This is a collection of Parts Lists, Workshop Manuals, specification sheets, and other useful data, all together on one CD for the first time. Such treasures as AMAL settings for almost all British bikes from 1933 to 1966, plus the later Concentrics, and Spare Parts lists for many of the models over the years. The Lucas files cover pretty much everything from 1936 to the 1970's, with Parts Lists, Maintenance and Repair Manuals and Technical Data sheets, and there is a SMITHS Parts List too which covers all the chronometric clocks and tachometer and speedo gearboxes from the 1950's to 1960's. Also included is data for other proprietary parts fitted to British bikes - Renolds, Girling, Champion.




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New Gold Star Cams 65-2442
120 Stlg Pounds Each
New Gold Star Cams 65-2446
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For Clearance - 75.00Stlg Pounds/20pc Standard ( Loose ) Set

+ 15.00 Stlg Pounds for Packing & Postage ( World Wide Rate )


BSA was for many years was the largest British motorcycle manufacturer.
In the 1850's a group of gunsmiths came together to form a Trade Association and in 1861 they founded  the BSA Company (Birmingham Small Arms).  As rifles tend to drop off in demand when there is no war, they decided to start making bicycles in 1880.
The first complete motorbike they built was produced in 1910. During the wars they produced both arms and motorcycles and in WW2 the main stay of the British Army became the BSA M20 with a side valve engine of 500cc. The Gold Stars became the name that will live for ever as they were the first of the production racing machines.
Despite entering the 1960s boasting record profits and a formidable reputation, by the end of the decade BSA were all but finished and production ceased in 1972/3.


Service Sheets for BSA MotorCyles and Lucas Electrical  for Sale.


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BSA M/Cycle Info is on my site)

NEW - BSA Std "B" Series -   Exploded Views and Part No's

For theoretical Maximum Speed in the Gears

download this .xls Worksheet

BSA Pre-Unit ( so called A10 ) 4 Speed GearBox
( Also shown is effect of Roy Shearwoods 5 Speed Cluster )

Some Early BSA's


1914 Model H

1914 Model K

1916 Model K 557cc

1917 550cc

1920 Model E

1921 5.57HP Engine

1923 V Twin 6HP

1924 BSA V Twin

1925 350cc

1925 B25 249cc

1925 E25 770cc

1925 E25 Light 770cc

1925 G25 986cc

1925 G25 Colonial 986cc

1925 H25 557cc

1925 H25 Light 557cc

1925 L25 Light 349cc

1925 S25 Colonial

1925 S25 Sports

1926 Sloper 500cc

1926 350cc O.H.V

1926 350cc S.V

1926 S6 Combination

1927 2.48HP

1927 2.48HP

1927 E 770cc

1929 Sloper

1929 S29

1929 A29 174cc Delux

1929 A29 174cc Delux

1929 S29 493cc 2 Port

1929 S29 493cc O.H.V

1930 S30 Sloper

1932 W32 500cc

1935 Blue Star

1937 B20

1937 B21 250cc

1937 B22 250cc Empire Star

1937 B23 350cc S.V

1937 B24 350cc Empire Star

1937 B25 350cc Competition

1937 B26 350cc O.H.V

1937 G14 1000cc V Twin

1937 M19 350cc

1937 M21 600cc

1937 M22 500cc

19?? M21

19?? WM20

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Post War ( WW 11 )

Up to 250cc

1963 K1 Beagle

1949 D1 Bantam
Rigid 125cc

1953 D1 Bantam
Plunger 125cc

1954 D3 Bantam
Major 150cc

1962 D7 Bantam

Another 1962 D7 Bantam


250cc Class

1947 C10

1950 C11 Rigid

1954 C11G Plunger
UK 250cc

1954 C11G Swinging-Arm
Export 250cc

1959 C15

1966 C15T

1968 B25 Starfire 

1971 B25SS Goldstar 

350cc to 500cc Class

1946 B31 Rigid

1949 A7 Star Twin

1953 B31 Plunger

1960 B33

1967 B40

1970 Fury

1967 B44 Shooting Star

1970 B44VS Victor

1955 B34

1950 M33 Rigid

1957 M33 Plunger

1959 DBD34 Goldstar

1962 A7

1969 A50R Royal Star


1971 B50SS Goldstar

1972 B50MX

2001 Regal SR 


650cc to 750cc Class

1950 A10 Golden Flash
Plunger 650cc

1960 A10 Golden Flash

1967 A65SS Spitfire Mk3

1967 A65 Hornet

1969 A65L Lightning

1969 A65 Thunderbird

1971 A65FS Firebird

1971 A65T Thunderbolt

1972 A65L Lightning

1970 A75 Rocket 3

1971 A75 Rocket 3
Vetter 750cc



BSA Model Reviews
Beagle 1963-66 75cc OHV single 4hp, 40mph, 125mpg 145lbs
In an attempt to compete with the Japanese 50cc & 90cc step-through BSA produce this model. Featuring roller main bearings, gear primary drive and a four speed box. It never caught on and is quite rare today.

Bantam Originally copied from the DKW RT125 and then developed on by BSA 

D1 1948-63, 125cc, 2-stroke single, 160lb, 125mpg, 50mph
Single saddle, rigid rear end and telescopic forks. Plunger rear end on later models. Unit single engine with 3 speed gear box. 

D3U 1958-61, 150cc, 2-stroke single, 180lb, 95mpg, 60mph
Rare, bored out version of the 125 with improved front forks and brake. Later model has a swinging arm frame. Engine had improved lubrication system means it is less prone to seizures. 

D5/7/10 1958-68, 175cc, 2-stroke single, 220lb, 95mpg, 65/70mph
The D7 benefited from better frame, forks and guards. Engine is a bored out version of the previous model. D10 had relatively modern chassis with much improved suspension and brakes. 

D14/175 1968-72, 175cc, 2-stroke single, 215lb, 55mpg, 75mph
The D14 was the best Bantam. The D14/4 has a 4speed gearbox. Most of the problems were now ironed out and this is a nice bike with good handling and reliability..

250cc Class

C10 1945-57, 249cc, sv single, 310lb, 75mpg, 55mph
A post-war utility bike with rigid frame, un-damped forks, minimal brakes and side-valve engine. Not the most reliable bike.

C11/C11G 1945-55, 249cc, ohv, 320lb, 8ompg, 60mph
Better than the C10 the motor has OHV. C11G was available as a 3 speeder with rigid frame or 4 speeder with plunger frame, both with a better front brake and generator electrics. Not a bad looking bike

C12 1956-58, 249cc, ohv single, 320lb, 75mpg, 67mph
Basically the same engine as the C11G but housed in modern chassis with reasonable suspension, better brakes and a more comfortable seat. This is the last pre-unit construction 250.

C15 Star 1959-67, 249cc, ohv single, 320lb, 70mpg, 75mph
A 250cc unit construction engine with neat  styling. In their day most models were prone to gearbox problems when treated harshly, but this should not be a problem now-a-days with an owner who rids the bike steadily. The sports version was the SS80 with roller big-ends which was quicker but was also less reliable, again this should not be a problem now-a-days. The standard models are easy to convert to 12v electrics, which improves lighting and allows the owner to fit electronic ignition. The C15T and Scrambles are more expensive to buy. An excellent classic to buy and own as there are plenty of models around and spares are easy to come by.

C25 Barracuda / B25 Starfire 1966-1970, 249cc, ohv single, 330lb, 60mpg, 75mph
Restyled C15 to try and keep up with the times. Tougher internals and castings, but less reliable due to the high compression engine, big-end problems being the most likely. The B25 Starfire introduced in 1968 is a better bet as it was more reliable and had less vibration following a mild de-tuning. Also sold as the Fleetstar for fleet users which was a de-tuned version which gives more reliability and in a modified frame.

B25SS Gold Star 1971-72, 249cc, ohv single, 320lb, 55mpg, 80mph
Last of the C15-based series with the new oil-bearing chassis and smart Street Scrambler styling for BSAs final fling. Nice bike which was let down by the leaky and out-of-date engine. Naming it the Gold Star 250 did not help sales or credibility. Badly assembled when new, but any that are still running should be OK.

350cc to 500cc Class

B31 1945-59, 348cc, ohv single, 365lb, 80mpg, 75mph
Basic but robust engine in pre-war rigid chassis fitted with telescopic forks. 1949 plunger suspension was fitted giving slightly more control. 1954 a swinging arm frame was fitted. Leaky and noisy with poor starting. The early rigid or plunger frame models are desirable.

B32 Gold Star 1949-57, 348cc, ohv single, 360lb, 65mpg, 85mph
Basically a B31 with more go, flashy bodywork and better brakes. The DB32 has a good duplex frame but the price is high and there are plenty to be had. Suffers from a 'cult status'.

Fury 1970-72, 349cc, ohc twin, 345lb, Prototype
Announced at the last Major Motor show, this twin was state of the art alloy engineering designed by Bert Hopwood. Carrying many of the now established Japanese components, such as electric start, indicators, twin overhead cams, it is a shame that it never made the production line, as tests proved it to be a good bike.

B40/SS90 1960-65, 343cc, ohv single, 305lb, 80mpg, 75mph
Bored out version of the C15 with greater torque and enclosed pushrods. Sound construction and usually reliable if treated kindly. WD version the best to ride. Sports SS90 version is pretty rare as the market did not welcome them.

B44 Victor (Shooting Star) 1966-70, 441cc, ohv single, 335lb, 65mpg, 85mph
B44 similar to C15 with stronger internals and modern chassis. Basically a stretch C15 with slightly more go and vibration. Engines can be fragile if abused. Sold initially in the USA as the Shooting Star, renamed in UK after 67 the later models had a good twin leading shoe front brake.

B33 1947-59, 499cc, ohv single, 420lb, 70mpg, 80mph
Bored out  B31 with more torque for the sidecar outfit. Later models had a swinging arm, and there is also TLS front drum conversion. This is the 1950s classic workhorse, which it will run for ever.

M33 1947-57, 499cc, ohv single, 370lb, 70mpg, 70mph
B33 engine inserted into a M21 bicycle. Intended to pep up performance for sidecar use. Not good on power or steering.

B34/DB34/DBD34 Gold Star 1950-62, 499cc, ohv single, 410lb, 55mpg, 110mph
These bikes has become legendary, expensive and somewhat over-rated. Fun on the open road, but exceptionally awkward in traffic and temperamental. Overpriced due to the vast over-reputation which masks their charm from many new riders. This was a racing road bike and has good looks.

B50SS Gold Star 1971-72, 499cc, ohv single, 340lb, 60mpg, 85mph
This was the last of the C15 stretches. It was a radical design change from the traditional British style, but in the fullness of time looks very nice. Built as a street scramble to meet the US market demands, the engine was over-stressed when pushed to the limit. Conversion to electronic ignition transforms it�s behaviour to one of GBs best ever singles. Starting requires the knack and vibration was still a problem at speed over 60 mph. There was also a B50T Victor model.

M20 1945-55, 496cc, sv single, 425lb, 55mpg, 65mph
The antiquated side valve engine, which was designed to meet the demands of the army and was sold off to the public after the war. Not fast and the brakes are adequate, but this is a very rugged machine. Stretched to 591cc in 1946 as the M21 until 1963, which raised the fuel consumption.

A7 Star Twin, Shooting Star 1946-61, 497cc, ohv twin, 420lb, 55mpg, 90mph
Splendid tough twin with smooth power up to 75mph. From 1954 with duplex frame, swinging arm, and better brakes gave good steering which was let down by poor lights. The A7SS Shooting Star is the tuned version sporty  (A7SS), which had an alloy head, improved suspension and full width hubs.

A50 Royal Star 1962-70, 499cc, ohv twin, 420lbs, 60mpg, 90mph
Unit construction replacement for the A7, that has little vibration and lacks in performance. A good looking bike which is reliable because its hard to thrash them. , if not sluggish machine. Became the Royal Star in 1965 after a brief sporting flurry as the A50C Cyclone and A50CC Cyclone Clubman, and then as the Wasp which was mainly for the USA. 

650cc to 750cc Class

A10 Golden Flash, Road Rocket, Super Rocket 1951-63, 646cc, ohv twin, 440lb, 55mpg, 105mph
Bored and stroked version of the A7. The A10 was sold as the Golden Flash with flash style. The Road Rocket had a bit more go and as the Super Rocket slightly better. 

A10 Rocket Gold Star 1962-64 646cc (70x84mm) OHV twin 51hp, 120mph, 45mpg, 390lbs
The Rocket Gold Star was a super-sports version and these can fetch up to 3 times as much. The A10 is a fine motorcycle and the only worry is the braking on the later ones which goes off quickly. Later swinging arm, duplex frame versions are better. The tuned up A10 motor dumped into Gold Star chassis resulted in a collector's piece. At high revs it has excess vibration and becomes unreliable if kept up length of time. There are some stock A10's in Goldie chassis with upgraded electrics that have all of the pose, style and none of the inherent hassles. Stock Rocket Gold Star's are too expensive but the fake stuff can be bought cheaply.

A65 Lightning,  Spitfire, Thunderbolt 1962-73, 654cc, ohv twin, 425lb, 55mpg, 120mph
Unit-construction replacement for the A10. The A65 has a reputation for vibration and  oil leak, but this is not justified. The Spitfire has stunning looks and excessive vibration from the engine. Late post 1971 bikes have an oil bearing frame which provides fine steering, although the seat height suffered with this design. The very late 1972 bikes are very good indeed and the Thunderbolt with a single carb gave a good compromise between power, reliability and economy.

A70 Lightning 1971, 751cc, ohv twin, 425lb, 50mpg, 120mph
This was a US only model, a special for racing in the states. Very rare and has been imitated, so beware. An obscure model which has a tendency towards high vibration.

A75R Rocket 3 1968-72, 740cc, ohv triple, 520lb, 35mpg, 125mph
Arguably the first Superbike, the Rocket 3 was quite a sensation when launched with its snappy acceleration, good styling, high top speed  for its day able, to cruise at 90 to 100mph with excellent steering. The bikes are becoming sought after and can be expensive to run. Rarer than the equivalent Triumphs Tridents as BSA stopped production in 1972.

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