Zenith Motorcycles

Last updated

Zenith Motorcycles
IndustryManufacturing and engineering
Founded1904
Defunct1950
HeadquartersLondon
ProductsMotorcycles

Zenith Motorcycles was a British motorcycle and automobile manufacturer established in Finsbury Park, London in 1903, [1] by W. G. Bowers. [2] Automobile manufacture only lasted from 1905 to 1906. The first Zenith motorcycle was the 'BiCar' of 1903, based on Tooley's Bi-Car design, which was purchased by Zenith for its own production. The BiCar was a unique design with hub-center steering and a low-slung chassis with the engine (from Fafnir in Germany) centrally fixed.

Contents

Fred ('Freddie') W. Barnes was hired as chief engineer in 1905, and patented the "Gradua" variable-ratio belt drive transmission that year. The Gradua system simultaneously changed the diameter of the crankshaft belt-drive pulley to alter the drive ratio, while moving the rear wheel forward or back to maintain belt tension. [3] The Gradua's action was controlled by a rotating lever atop the fuel tank, and was among the first attempts to provide multiple drive ratios for a motorcycle, at a time when very simple, direct belt-drive transmission was the industry norm. Variable drive ratios proved a significant advantage in competition, leading riders of other marques to complain the Gradua gave an unfair advantage; eventually Zeniths with Gradua gears were banned from many competitions. Zenith capitalized on this ban, adding the word "Barred" to their advertising and logo. The Gradua system was replaced by the now-standard gearbox and chain transmission in 1924.

In 1914, the factory moved to larger premises, quite close to the Brooklands race track,( 5 miles away) at the old East Molesey Mill about halfway between East Molesey and Esher. As WW1 rapidly approached, the factory turned its attention to commercial sidecar outfits, ostensibly to replace the horses commandeered by the military. [4] After WW1, racing and endurance trials occupied much of Freddie Barnes' interest. Zenith motorcycles used engines from various suppliers including Precision, Villiers, Bradshaw, Martlett, British Anzani, Fafnir, and JAP. [5]

Zenith was a relatively small manufacturer, but had significant success in speed contests throughout the 'Teen and 1920s. Chief Engineer Freddie Barnes personally oversaw Zeniths in competition, and in the 1920s racing Zeniths held more 'Gold Stars' on the Brooklands racing circuit (for 100+mph laps in competition) than any other marque. [6] Racing engines of single and v-twin configuration included the most advanced designs available, including the DOHC single-cylinder JAP, the twin-cam JAP sidevalve v-twin, the Martlett OHV 1000cc v-twin, the Blackburne OHV 1000cc v-twin, and the JAP KTOR and JTOR OHV 1000cc v-twins. [7] Riders included 'Ted' Baragwanath, Bert LeVack, Owen Baldwin, H.M. Walters, and Joe Wright.

In the 1931 Zenith declared bankruptcy due to the Depression, although 'Writers of Kennington', a principal Zenith dealer, purchased the name and restarted production at the Hampton Court factory in Surrey on the river and immediately adjacent to the Hurst Park horse racing venue. The Second World War interrupted production again, and Zenith finally ceased production in 1950. [8] The last Zenith models of 1947-1950 used JAP 750cc sidevalve v-twins, and were basically the same models as produced before WW2.

Automobile history

Between 1905 and 1906, the company introduced the Popular model, which had a two-cylinder, 6HP Stevens engine and a belt driven rear axle. [9]

Speed records

Zenith were always keen to promote themselves via competition. Freddie Barnes competed and won regularly on his own machines in 1909–1913, [10] and in 1922 it was a Zenith that was the first British machine to do a 100 mph (160 km/h) lap of the Brooklands circuit with rider Bert le Vack. [10] In 1925 Zenith held the record for the number of over 100 mph laps of the bumpy Brooklands circuit. [10] Works rider Joseph S. Wright held the lap record at Brooklands from 1925 until 1935. [10]

Zenith held the motorcycle world speed record on two occasions, the first FIM record of 124.55 mph (200.44 km/h) set in 1928 by Owen M. Baldwin at Arpajon, France, the site of the Autodrome de Linas-Montlhéry. [11] Bert le Vack surpassed Baldwin the following year on a 995 cc (60.7 cu in) Brough-Superior at the same location. [11] In 1930 Zenith was in financial trouble due to the recession, and were taken over by one of their dealers, Writer's of South London. [12] The ex-Zenith works rider Joe Wright, riding an OEC with a 994 cc (60.7 cu in) JAP engine, took back the record on 31 August at 137.23 mph (220.85 km/h), again at Arpajon, France. [11] But the record was broken twice more in 1930, first to Ernst Jakob Henne riding a supercharged BMW to 137.85 mph (221.85 km/h) at Ingolstadt, Germany. [11] Claude Temple made arrangements to try to win the title back in Cork, Ireland using his supercharged OEC again with Joe Wright on board. [13] Joe Wright had managed to acquire the works 995 cc (60.7 cu in) supercharged J.A.P-engined Zenith, and he took this to Ireland as a spare machine (visible on the Pathe news when the OEC is tow started [13] ). The OEC bike suffered a mechanical failure and was not able to complete the required two runs, so Wright used his Zenith to set a new world record of 150.65 mph (242.45 km/h). [11] As Zenith were temporarily out of business, and OEC were paying the bills, the fact the Zenith had made the run and not the OEC was conveniently overlooked in much of the publicity of the time, [13] and even in the FIM record books .[ citation needed ]. An eyewitness account by Freddie Barnes himself was published the following year, noting the Zenith victory, [14] and later eyewitness accounts confirmed his claim. [15]

Models

1924 Zenith JAP 346 cc Zenith JAP 346 cc 1924.jpg
1924 Zenith JAP 346 cc
ModelYearNotes
Zenith Bi-Car1903Hub-center steered, full suspension
Zenith Tri-Car1908Fafnir single-cylinder
Zenith 'Zenette'1908Fafnir single-cylinder
Zenith 'Zenette' Tri-car1908J.A.P. water-cooled 6HP, Chater-Lea 2-speed gear [16]
Zenith Gradua 6HP (770cc)1911"Gradua" variable drive belt
Zenith 3 1/2HP1911JAP single-cylinder sidevalve 500cc
Zenith Lightweight1911JAP single-cylinder OHV 250cc
Zenith 8HP Twin-Cylinder Racer1913JAP twin-cylinder '90 Bore' OHV
Zenith 3 1/2HP Single-Cylinder Racer1913JAP single-cylinder '90 Bore' OHV
Zenith Models E, G, J1914JAP V-twin sidevalve 770cc, 1000cc, 1100cc
Zenith Gradua 680 cc1918 JAP Twin
Zenith-Bradshaw 494cc1922Oil-cooled horizontally opposed Bradshaw engine
Zenith "Brooklands".1923344 cc JAP engine
Zenith 346 cc1924 JAP engine
Zenith 680 cc1926Side-valve JAP engine
Zenith C5 Special 500 cc1936 JAP 500cc OHV engine
Zenith 750 cc1948 JAP engine

The Zenette motorcycle and Zenette tri-car had a novel form of rear suspension at a time when most motorcycles had none, partly because of the effect rear suspension had on the tension of the drive belt. In the Zenette this was overcome by having the swinging arm pivoted near the centre of the engine and mounting the engine on the swinging arm. [17] The Zenette motorcycle had another instantly recognisable feature, the fuel tank and battery were at the rear of the engine space, leaving a bare top tube.

See also

Related Research Articles

<span class="mw-page-title-main">Velocette</span> English motorcycle manufacturer, 1904–1971

Velocette is a line of motorcycles made by Veloce Ltd, in Hall Green, Birmingham, England. One of several motorcycle manufacturers in Birmingham, Velocette was a small, family-owned firm, selling almost as many hand-built motorcycles during its lifetime, as the mass-produced machines of the giant BSA and Norton concerns. Renowned for the quality of its products, the company was "always in the picture" in international motorcycle racing from the mid-1920s until the 1950s, culminating in two World Championship titles and its legendary and still-unbeaten 24 hours at over 100 mph (161 km/h) record. Veloce, while small, was a great technical innovator and many of its patented designs are commonplace on motorcycles today, including the positive-stop foot shift and swinging arm rear suspension with hydraulic dampers. The business suffered a gradual commercial decline during the late 1960s, eventually closing in February 1971.

<span class="mw-page-title-main">Brough Superior</span> Brand of English motorcycles and automobiles

Brough Superior motorcycles, sidecars, and motor cars were made by George Brough in his Brough Superior works on Haydn Road in Nottingham, England, from 1919 to 1940. The motorcycles were dubbed the "Rolls-Royce of Motorcycles" by H. D. Teague of The Motor Cycle newspaper. Approximately 3048 motorcycles were made in the 21 years of production; around a third of that production still exists. T. E. Lawrence owned eight of these motorcycles and died from injuries sustained when he crashed number seven; the eighth was on order. Moving forward to 2008, vintage motorcycle enthusiast Mark Upham acquired the rights to the Brough Superior name. In 2013 he met motorcycle designer Thierry Henriette and asked him to design a new Brough Superior motorcycle. Three months later a prototype of a new SS100 was shown in Milan.

HRD Motors Ltd was a British motorcycle manufacturer in the 1920s. It was founded by Howard Raymond Davies. He had worked in motorcycling, and had raced with some success in the mid-twenties, but often not finishing due to unreliability. This inspired him to build a reliable performance motorcycle, using the advertising slogan "Built by a rider". Others also aimed at a similar market, like George Brough of Brough Superior motorcycles.

<span class="mw-page-title-main">New Hudson (company)</span>

The New Hudson Cycle Co. was originally started in 1890 by George Patterson, and manufactured 'safety' bicycles in Birmingham. In 1903 they produced their first motorcycle, but times became tough for Patterson after one of his sons died in WW1 and the other lost a leg. The family sold the factory to HJ Bructon after WW1, and in 1920 the company was reformed as New Hudson Ltd.

<span class="mw-page-title-main">Cotton (motorcycle)</span> Former British motorcycle manufacturer

The Cotton Motor Company, was a British motorcycle manufacturer of 11a Bristol Road, Gloucester, and was founded by Frank Willoughby Cotton in 1918. F.W. presided over the company until his retirement in 1953. The company was reconstituted as E. Cotton (Motorcycles) Ltd, and traded until 1980. The marque was later resurrected in the late 1990s by a business which manufactured replicas of earlier machines.

<span class="mw-page-title-main">1949 Isle of Man TT</span>

The 1949 Isle of Man Tourist Trophy was the first round of the Grand Prix World Championship that was held in the Isle of Man.

<span class="mw-page-title-main">Rudge-Whitworth</span> British bicycle, motorcycle and sports car manufacturer

Rudge Whitworth Cycles was a British bicycle, bicycle saddle, motorcycle and sports car wheel manufacturer that resulted from the merger of two bicycle manufacturers in 1894, Whitworth Cycle Co. of Birmingham, founded by Charles Henry Pugh and his two sons Charles Vernon and John, and Rudge Cycle Co. of Coventry.

<span class="mw-page-title-main">Motorcycle land-speed record</span>

The motorcycle land-speed record is the fastest speed achieved by a motorcycle on land achieved by Martynas Kišonas. It is standardized as the speed over a course of fixed length, averaged over two runs in opposite directions. AMA National Land Speed Records requires 2 passes the same calendar day in opposite directions over a timed mile/kilo while FIM Land Speed World Records require two passes in opposite directions to be over a timed mile/kilo completed within 2 hours. These are special or modified motorcycles, distinct from the fastest production motorcycles. The first official Fédération Internationale de Motocyclisme (FIM) record was set in 1920, when Gene Walker rode an Indian on Daytona Beach at 104.12 mph (167.56 km/h). Since late 2010, the Ack Attack team has held the motorcycle land speed record at 376.36 mph (605.69 km/h).

<span class="mw-page-title-main">Howard R. Davies</span>

Howard R. Davies, was an English motorcycle racing champion, motorcycle designer and originator of the 'HRD' marque which later became Vincent-HRD motorcycles. He died in January 1973.

<span class="mw-page-title-main">AJS V4</span> Racing motorcycle

The AJS V4 started out as a prototype air-cooled V4 road bike, but became a water-cooled and supercharged racing bike.

Rex, Rex Motorcycles, Rex-Acme, was a car and motorcycle company which began in Birmingham, England in 1900. Rex soon merged with a Coventry maker of bicycles and cars named Allard and then later in 1922 the company merged with Coventry's 'Acme' motorcycle company forming 'Rex Acme'. The company existed until 1933, and, in its heyday, was considered one of the greatest names in the British motorcycle industry.

Blackburne was a trade name of Burney and Blackburne Limited a British manufacturer of motorcycles from 1913 to 1922 at Tongham near Farnham, Surrey. They were also a major supplier of engines to other motor cycle and light car makers and continued to make these until 1937. Burney and Blackburne also made small aircraft engines.

<span class="mw-page-title-main">Brough Superior SS100</span> Motorcycle produced by George Brough

The Brough Superior SS 100 is a motorcycle which was designed and built by George Brough in Nottingham, England in 1924. Although every bike was designed to meet specific customer requirements—even the handlebars were individually shaped—sixty-nine SS100s were produced in 1925 and at £170 were advertised by Brough as the "Rolls-Royce of Motorcycles". The term was coined by a magazine road tester in his review of the bike, and Brough eventually obtained explicit permission to use it after a Rolls-Royce executive toured the Brough Superior factory. All bikes had a guarantee that they were capable of 100 mph (160 km/h).

New Hudson Motorcycles was a British motorcycle manufacturer. Founded in 1903 by George Patterson in Birmingham, their first motorcycle was produced in 1902 but was unsuccessful. The New Hudson range expanded between 1910 and 1915 using JAP engines, then the factory joined the war effort until 1919. As well as side-valve and OHV single-cylinder engines of 350 to 600 cc, they also built a 211 cc two-stroke and a number of three-wheelers with MAG engines. In 1927 Bert le Vack broke the 100 miles per hour (160 km/h) record at Brooklands on a 500 cc New Hudson.

<span class="mw-page-title-main">Osborn Engineering Company</span>

Osborn Engineering Company was a British manufacturer of motorcycles, which sold its machines under the OEC brand name.

<span class="mw-page-title-main">Bert le Vack</span> British motorcycle racer

Herbert 'Bert' le Vack was a motorcycle world speed record holder throughout the 1920s and earned the nickname the 'Wizard of Brooklands' for his exploits at Brooklands.

<span class="mw-page-title-main">Jarvis of Wimbledon</span>

Jarvis & Sons Limited were South London-based motor dealers for Morris and MG, and latterly coachworks providing special bodies for various car chassis until after World War II.

<span class="mw-page-title-main">BMW WR 750</span> Type of motorcycle

The BMW WR 750 was a supercharged racing motorcycle from BMW with two-cylinder, four-stroke flat twin engine that was first built in 1929, and developed through 1935 solely for racing by the factory.

<span class="mw-page-title-main">Grindlay Peerless</span> Former English motorcycle manufacturer

Grindlay Peerless is a historic motorcycle manufacturer that operated out of Coventry, England, throughout the early 20th-century, specialising in racing machines including the record breaking 498cc Grindlay Peerless.

References

  1. The Motorcycle, 'Milestones of Design', London, Sep.15, 1937
  2. VMCC Bulletin, Letters, January 1969,
  3. The Motor, Sep. 26th 1905
  4. "East Molesey Mill".
  5. "Zenith Motorcycles" . Retrieved 14 August 2008.
  6. Brooklands Bikes in the Twenties, Hartley, 1980, Argus Books, Watford, ISBN   0-85242-620-8
  7. The Vintage Years at Brooklands, 1968, Bayley, Goose&Son, Norwich, ISBN   0 900404 00 0
  8. The Motorcycle, 'Milestones of Design', London, 15 September 1937
  9. Harald Linz, Halwart Schrader: Die Internationale Automobil-Enzyklopädie. United Soft Media Verlag, München 2008, ISBN   978-3-8032-9876-8.
  10. 1 2 3 4 d'Orleans, Paul (17 October 2008), "F.W. 'Freddie' Barnes", The Vintagent
  11. 1 2 3 4 5 Setright, L.J.K. (1979), "Chronological Table of Absolute World Speed Records for Motorcycles Recognised by the FIM", The Guinness book of motorcycling facts and feats, Guinness Superlatives, p. 238, ISBN   0851122000
  12. Zenith Motors, Graces Guide
  13. 1 2 3 "Cork. 150 miles an hour on a motor cycle! Streamlined in every possible way even to his helmet - J S Wright and an O.E.C. - Jap-engined - wins back record for Britain from Germany.", Pathé News, Film ID 751.17, 10/11/1930
  14. Barnes, F. W. (25 February 1931), "Letters to the Editor", Motorcycling
  15. VMCC Bulletin, 'Letters', 14 October 1978
  16. Zenith Motors Ltd, The Motor Cycle, 27th Nov 1907, p955
  17. Zenith Motor Cycles for 1908, The Motor Cycle, 6th Nov 1907, p884