Single-Cylinder
Honda CRF230F Motorcycles
2004 CRF230F ENGINE Engine Type 223cc air-cooled single-cylinder four-stroke Bore and Stroke 65.5mm x 66.2mm Compression Ratio 9.0:1 Valve Train SOHC; two-valve Fuel Delivery 26mm piston-valve Ignition CDI DRIVETRAIN Transmission Six-speed Final Drive #520 O-ring-sealed chain; 13T/50T CHASSIS / SUSPENSION / BRAKES Front Suspension 37mm leading-axle Showa fork; 9.5-inch travel Rear Suspension Pro-Link Showa single-shock …
1961 Matchless G80 Typhoon
1961 MATCHLESS G80 TYPHOON BACKGROUND Parent-company AMC knew how to build big singles. Despite now having a nice lineup of vertical twins, the real money was made selling Matchless and AJS singles. For Matchless, the top of the heap was the 500cc G80, and the best of those was the Typhoon. The AJS version was …
1945 BSA M20
The 1945 BSA M20 was the last year of production during World War 2 and and just a part of BSA’s massive wartime contribution to Britain’s war effort. 1937 was its first year of production that would last until the late 1950s. Designed to be simple, rugged and reliable, the WM20 was a side-valve (flathead) …
1968 Rickman-BSA 441
This 1968 Rickman-BSA 441 represents years of development. After years of racing motocross in the 1950s in England and Europe, brothers Don and Derek Rickman decided to design their own frame. At the time, most dirt bikes were simply stripped-down street bikes, which were too heavy and not ideal for racing in the dirt. They …
Royal Enfield Bullet
ROYAL ENFIELD BULLET BACKGROUND Royal Enfield had been building sturdy, reliable motorcycles since the turn of the century. They produced military motorcycles for the British army in both world wars. They struggled at the edge of insolvency throughout most of the 1930s but managed to hang on until the the second world war boosted their …
1964 Velocette Venom
1964 Velocette Venom 1964 VELOCETTE VENOM BACKGROUND By the time Venom production began in 1965, Velocette was almost at the end of its long road of singles. And it represented everything that Velo had learned about building a big single. They were fast, light, handled well, and were very reliable. Since Velocette never made a …
1953 BSA Gold Star
1953 BSA Gold Star 1953 BSA GOLD STAR BACKGROUND Throughout the 1930s, BSA created and developed a strong line of single-cylinder motorcycles. In 1937, they introduced the 500cc Empire Star. When Wal Handley lapped the Brooklands racetrack at over 100 mph average speed, he was awarded a Gold Star. The name stuck and was applied …
1969 Velocette Venom
1969 Velocette Venom 1969 VELOCETTE VENOM By 1969, Velocette was a year from closing its doors. Whether they knew that in 1969 or not is questionable, but surely they realized they were in dire straights, financially. Velocette was the one British brand still building bikes in the 1960s that never fielded a vertical twin. The …
2007 Royal Enfield Bullet
2007 Royal Enfield Bullet 2007 ROYAL ENFIELD BULLET BACKGROUND Like all modern, Indian-built Royal Enfields, the 500 Bullet is a descendant of the original British-built Enfields of the late 1940s. Despite being completely redesigned in modern times by parent company Madras Motors, and sprouting modern features like electric starters and electronic fuel injection, Royal Enfields …
1946 Velocette KSS
1946 Velocette KSS 1946 VELOCETTE KSS BACKGROUND The Velocette KSS debuted in 1925 as an OHC (overhead cam) 350cc air-cooled single. Being OHC placed it at the cutting edge of engine technology at a time when most machines still used side-valve designs or pushrods. The name KSS breaks down to the K for overhead cam …
1959 Velocette Venom
1959 Velocette Venom 1959 VELOCETTE VENOM BACKGROUND The Venom was Velocette’s hottest bike from its inception in 1955. In 1961 a factory-prepared Venom with a small fairing set the world’s 24-hour endurance speed record of 100.05 MPH at the Montlhery race track in France. The record stood until 2008 for 500cc motorcycles. The 499cc Venom …
1973 Rickman 250MX
1973 Rickman 250MX 1973 Rickman 250MX Background This 1973 Rickman 250MX is the product of years of development. Brothers Don and Derek Rickman were successful motocross racers in the 1950s in England and Europe. They began building racing frames in 1959, and created a line of frames that were designed to accept almost any engine …
1973 BSA B50MX
1973 BSA B50MX 1973 BSA B50MX BACKGROUND BSA produced one of the world’s most successful 500cc singles in the Gold Star starting in 1938 and running all the way through 1963 when production ended. The entire BSA product line was being converted from non-unit construction to unit-construction and the ancient non-unit Gold Star had to …
A Brief History of BSA Bantam Motorcycles
BSA Bantam History ABOVE: 1950 BSA Bantam D1 123cc. SPOILS OF WAR The birth of the BSA Bantam line did not take place in England after the war. Indeed it started out as a pre-war Germany design, the DKW RT125, and DKW was taken over by the Allies as part of the war reparations Germany …
1950 Vincent Comet
1950 VINCENT COMET RUNNING GEAR The Vincent Comet had frame similar in layout to the V-twin Vincent Black Shadow which included Vincent’s proprietary cantilever rear suspension and Vincent’s Girdraulic forks up front. And, like the big V-twins, the engine was a stressed member of the frame, eliminating the need for front downtubes and an engine …
1936 Vincent Comet
1936 VINCENT COMET FRAME & CYCLE GEAR The Vincent Comet had frame similar in layout to the V-twin Vincent Black Shadow which included Vincent’s proprietary cantilever rear suspension and Vincent’s Girdraulic forks up front. Also typical of Vincent motorcycles, the Comet had two Single Leading-Shoe (SLS) front drum brakes, one on each side. 1936 VINCENT …
1935 Vincent Comet
1935 VINCENT COMET RUNNING GEAR The Vincent Comet had frame similar in layout to the V-twin Vincent Black Shadow which included Vincent’s proprietary cantilever rear suspension and Vincent’s Girdraulic forks up front. Also typical of Vincent motorcycles, the Comet had two Single Leading-Shoe (SLS) front drum brakes, one on each side. COMET ENGINE DESIGN The …
1949 Vincent Comet
1949 VINCENT COMET RUNNING GEAR The Vincent Comet had frame similar in layout to the V-twin Vincent Black Shadow which included Vincent’s proprietary cantilever rear suspension and Vincent’s Girdraulic forks up front. And, like the big V-twins, the engine was a stressed member of the frame, eliminating the need for front downtubes and an engine …
1951 Vincent Comet
1951 VINCENT COMET RUNNING GEAR The Vincent Comet had frame similar in layout to the V-twin Vincent Black Shadow which included Vincent’s proprietary cantilever rear suspension and Vincent’s Girdraulic forks up front. And, like the big V-twins, the engine was a stressed member of the frame, eliminating the need for front downtubes and an engine …
Ariel Red Hunter
ARIEL RED HUNTER BACKGROUND The 1930s were indeed the Golden Age for the British motorcycle industry. At the time, nearly all of them relied heavily on one basic engine architecture: the air-cooled, pushrod OHV single, and most marques had built their lineup of 350 and 500 singles. As the 1930s opened, Ariel’s product line was …
1964 AJS Model 16
1964 AJS MODEL 16 BACKGROUND Parent-company AMC secured some lucrative contracts from the British government to build, among other things 80,000 Matchless G3s and G3/Ls. After the war, these became the basis for their civilian middleweight line. As always, every Matchless motorcycle had a near-identical twin in the AJS lineup. This was the AJS Model …
1927 AJS Model H4
1927 AJS MODEL H4 AJS built a fine line of motorcycles in the late 1920s, including side-valve (SV) and overhead valve (OHV) singles ranging in engine size and output. Horsepower was in the single digits across the board. The H4 was a 350cc SV single with advanced features for the day. Special alloys were used …
BSA Gold Star
ABOVE: The 1960 BSA Gold Star Clubman was a high-performance roadster. The Gold Star also earned major off-road competition cred during its 25-year career. GOLDIE LORE The BSA Gold Star was one of the most successful motorcycles of all time, both in the showroom & on the track. It’s ancient design was outdated almost at …
Matchless G3
1936 Matchless G3C Trials. MATCHLESS G3 EARLY HISTORY In the early 1930’s Matchless was enjoying great success with its side-valve & later OHV singles. It was only natural to continue to develop this line, and in 1936 Matchless introduced two new distinct ‘families’ of motorcycles: The “Clubman”, and the “Tourist”. Available in 250, 350 & …
1946 AJS Model 18
1946 AJS MODEL 18 BACKGROUND Immediately following the end of World War II in 1945, every British motorcycle manufacturer rushed to convert from war production back to making civilian products. Millions of British troops were coming home, and they would all need transportation. But economic times were tough in England after the war, and many …
BSA B50
BSA B50 BACKGROUND BSA built its business and its reputation on big singles. The 350cc and 500cc Gold Star dominated the off-road market from the late 1930s to the early 1960s. By this time of course, the state of the art had moved forward considerably, and the heavy Gold Star couldn’t compete with lighter 2-strokes …
1947 BSA C10
1947 BSA C10 BACKGROUND With the exception of their exciting new vertical twin, the A7, BSA’s postwar lineup was pretty pedestrian. They were feeding the biggest market in England at the time: low-cost commuter bikes. While England emerged from World War II as one of the victors, they were shattered economically. So millions of returning …
Velocette KSS
VELOCETTE KSS – WHAT’S IN A NAME? In case you were wondering, the letters “KSS” stand for Kamshaft Super Sport or Camshaft Super Sport. The original owners of Velocette were German, and the German spelling is with a K. The KSS was the final development of the K-series, and it stayed in series production until …
1950 AJS 7R Boy Racer
1950 AJS 7R BOY RACER BACKGROUND The 7R was a factory road racer produced by AJS from 1948 through 1963. It’s 348cc displacement put it in the middleweight, or ‘junior’ class of racing, and hence the nickname “Boy Racer”. With up to 40 horsepower and weighing only 285 pounds, they were fast (120 mph top …
1959 AJS Model 16
1959 AJS MODEL 16 BACKGROUND The Model 16 was AJS’s middleweight 350 single. They were rugged, well-designed and fast for their era and class. Since AMC owned both companies, both AJS and Matchless had nearly identical bikes. Matchless called theirs the G3 and besides styling, the only mechanical difference between the two was that AJS …
1953 AJS Model 18
1953 AJS Model 18S 1953 AJS Model 18C 1953 AJS MODEL 18 BACKGROUND Since AMC owned both brands, the AJS Model 18 is almost mechanically identical to the Matchless G80. Besides styling, the only real difference between the two is that AJS mounted it’s magneto in front of the cylinder, and Matchless mounted theirs behind. …
1964 Matchless G3C
1964 MATCHLESS G3C BACKGROUND Parent-company AMC got a contract to build 80,000 Matchless G3s and G3/Ls for the British government during World War II. When the war ended, these became the foundation of AMC’s middleweight line, including both the 350cc Matchless G3 and the AJS Model 16. As always, both were solid, well-built machines that …
1955 BSA Gold Star
1955 BSA GOLD STAR BACKGROUND By 1955, the Gold Star was well-sorted and had turned into a fine machine. All Goldies were special to begin with, each engine being hand-assembled and dyno-tested at the factory. A copy of the dyno test was included with each new Gold Star. They were powerful and reliable, and they …
1953 Velocette MAC
1953 Velocette MAC 1953 VELOCETTE MAC IS A TOP-SELLER The Velocette MAC debuted in 1933. It had an air-cooled OHV 350cc single cylinder engine that was capable of hustling the 280-pound MAC to 75mph. It was developed out of the 250cc Velocette MOV by lengthening its stroke for the 1934 model year, and the new …
1958 Triumph Tiger Cub
1958 Triumph Tiger Cub 1958 TRIUMPH TIGER CUB BACKGROUND The 200cc T20 Tiger Cub was produced from 1956 through 1968 and sold quite well for Triumph. The original Cub was introduced in 1953 at the Earls Court Motorcycle Show in London England as a 150cc commuter, at a time when there was a very big …
1962 Velocette Venom
1962 Velocette Venom 1962 Velocette Venom CLUBMAN 1962 VELOCETTE VENOM CLUBMAN The Venom was already a fairly low-volume bike, but the Clubman option was even more rare. Just 36 Venom Clubmans were built in 1962. The Clubman package included rearset footpegs and controls, early-style upswept exhaust, TLS (Twin Leading Shoe) front drum brake with cooling …
1957 Norton Manx
1957 Norton Manx 1957 NORTON MANX BACKGROUND The Norton Manx was developed in 1937, in both SOHC and DOHC form, to compete in and win the Isle of Man TT. Before fully developed, World War II intervened, and production of the Manx was delayed until 1946. The Manx quickly gained a reputation for its speed …
1939 BSA Gold Star
1939 BSA Gold Star THE 1939 BSA GOLD STAR IS FAST! The BSA Gold Star was introduced in 1938 in both 350cc and 500cc form. They were hand-built as high-performance machines. The BSA factory offered several performance modifications as options. Every bike was run on a dyno, and came from the factory with a printout …
1961 Triumph Cub
1961 Triumph Cub 1961 TRIUMPH CUB BACKGROUND The 200cc T20 Tiger Cub was produced from 1956 through 1968 and sold quite well for Triumph. The original Cub was introduced in 1953 at the Earls Court Motorcycle Show in London England as a 150cc commuter, at a time when there was a very big market for …
2007 Royal Enfield Bullet Sidecar Rig
2007 Royal Enfield Bullet Sidecar Rig 2007 ROYAL ENFIELD BULLET SIDECAR RIG BACKGROUND Royal Enfield was another classic British motorcycle brand that started out in the late 1800s building bicycles. By 1899 they were dropping other makers’ engines into things and before long they were building motorcycles. Over the following decades they built a reputation …
