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Greeves (motorcycles)
Encyclopedia
Greeves Motorcycles Ltd is a British motorcycle
manufacturer producing motorcycles mainly for the trials
and off-road market. Owner Richard Deal bought the rights to the Greeves name in May 1999. The original company had been producing motorcycles since 1952, funded by a contract with the Ministry of Pensions
for their Invacar
. a three wheeler for disabled drivers. After many wins in motorcycle trials competitions and developing a successful US export market the original company ceased trading following a fire in 1977. The new company continues to develop motorcycles and launched the first new Greeves Trials Bike for 20 years in January 2009, with an innovative all new British two-stroke 280 cc engine.
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The original company founded by Bert Greeves
MBE
was the Invacar company. Greeves was mowing the lawns of his home in Worcestershire
when he had the idea of fitting the lawnmower engine to his disabled cousin's wheelchair and invented the Invacar. Invacar Ltd was set up and won a major contract to provide motorised three wheeled invalid carriage vehicles to the UK Government Ministry of Pensions and National Insurance. in 1952 from a small factory in Church Road, Thundersley
not far from Southend on Sea in Essex
.
Encouraged by this success, Bert Greeves decided to diversify into motorcycle manufacture. A keen trials rider in his spare time, he had started collecting veteran and vintage motorcycles, including a 1912 Triumph with the registration 'OLD 1'. His disabled cousin Derry Preston-Cobb also encouraged him to start the motorcycle business. Derry's own Invacar was used as a promotional vehicle and had been fitted with a more powerful engine, which he used to amazed other drivers as he overtook them on the Southend roads. Working together they developed a prototype using a two-stroke 197 cc single-cylinder engine sourced from Villiers Engineering
- and a Greeves badge on the fuel tank. The motorcycles were really a sideline for the main business of producing the three-wheeled invalid cars, so development of the prototypes had to be fitted in when the production schedule allowed. Bert had been an enthusiastic motorcyclist in his youth and always had an ambition to become a motorcycle manufacturer. The first Greeves motorcycle was developed in mid-1951, using rubber-in-torsion springing at both front and rear. This unconventional rubber springing came straight from the patented system used for the invalid car. Rear wheel suspension was by a pivoted fork with rods connecting to torsion rubber mounted units just below the seat. Friction dampers were also fitted which could be manually adjusted. The front forks were also unusual, with short leading links to carry the wheel, pivoting on rubber-in-torsion spring units (later known as the 'Banana Leading Link' front fork. Motorcycle production began in the autumn of 1953 and the new models featured a unique frame with the steering head and a massive front down member combined in a large 'I-section' cast alloy beam, cast in a new light-alloy foundry that had been added to the Greeves factory. The tubular frame member was inserted into a mould and the main frame was cast around it, making for a very strong frame. Made from LM6 silicon-aluminium alloy, it was claimed to be stronger than tubular steel and proved capable of standing up to the rough treatment of international off road trials competition. Protection was finished off with reinforced engine cradle plates which were also light alloy castings.
Derry Preston-Cobb was made Sales Manager for the motorcycle business and they started with three models, a scrambler, a three speed road bike and a four-speed version. At the 1954 Earls Court
Show, they also launched the 'Fleetwing', a two-cylinder two-stroke with a 242 cc British Anzani
engine developed from those used for motor boats and featuring a crankshaft with a hollow mid section that acted as a rotary inlet valve. With a top speed of just 61 mph (27.3 m/s), the Fleetwing continued in production until 1956 when the stock of British Anzani engines was finally exhausted. The Fleetwing name was brought back in 1957, however, for the Villiers
engined 249 cc model. This was more powerful than the earlier Fleetwing and now had a more respectable top speed of 70 miles per hour (31.3 m/s). Gearboxes were supplied by Albion Motors
, later replaced by their own designs from 1964 forward. The lightweight high powered package made them successful in the trials
market place against Triumph and BSA
models.
By 1962 there were eleven models in the Greeves range. The offroad motorcycles were also developed through an association with Queen's University Belfast producing the later Greeves QUB model. The last of the Challenger models was produced in 1968, replaced by the 250 and 380 cc Griffon motocrossers in 1969. The original leading link fork was no longer fitted, having been replaced by standard telescopic forks as the leading link design could not match the travel of forks. Also abandoned was the original cast alloy front down beam, replaced with a new frame of Reynolds 531 chrome molybdenum with a conventional down tube.
Greeves also built a successful export business and at one time most of the motorcycles produced were going to the United States. Greeves became so successful in the US that they had a significant influence on the growth of the off-road biking sport and with the invention of the trail bike with their road legal off-roader, the Ranger.
rider Brian Stonebridge
and started competing in the European Motocross Championship. Stonebridge became the company Competitions Manager and Development Engineer, as he was a skilled two-stroke tuning specialist and was able to significantly improve the performance of the Villiers engines. In April 1957 Brian Stonebridge managed to beat the 500 cc bikes on the much smaller capacity Greeves round the demanding and hilly Hawkstone Park
course, winning the 350 cc race and coming second in the 500 cc race, establishing Greeves' reputation as true off-road competition motorcycles. The next Greeves model was called the 'Hawkstone'; to capitalise on this success and the company began to specialise in motocross motorcycles, ridden by champions including Peter Hammond, Jack Simpson and Norman Sloper .
Stonebridge led a three-man Greeves team to the West German International Six Days Trial
event in 1958 and had a faultless ride, winning another gold medal. In October 1959, tragedy struck the Greeves team when Brian Stonebridge was killed in a car accident. Bert Greeves was at the wheel and Stonebridge was in the passenger seat when they crashed returning from a visit to a factory in Bradford
. In a head-on collision Bert was only slightly injured but in the days before seat belts it proved fatal for Brian, who died at the scene of the accident.
After the death of Stonebridge, Greeves signed Dave Bickers, who won the 1960 and 1961 250 cc championship. The company went on to win the Manx Grand Prix
, the Scott Trial
, the European Trials Championship and the Scottish Six Days Trial
, winning gold medals in the ISDT and the ACU 250 cc Road Race. Bert Greeves also managed to sign up Bill Wilkinson, the Yorkshire
trials rider who made the headlines when he won the British Experts Trail competition in 1960, the first time it had ever been won on a two-stroke motorcycle and a significant result for the Greeves factory.
In 1963 the Greeves range still included the 25DC Sports Twin and two new models with the latest glass fibre tanks and handlebar fairings, as well as plastic mudguards. These were the 25DD 'Essex' and the 250 DCX 'Sportsman'. The same year the Greeves factory was asked to provide the motorcycles for the British ISDT team. This was significant because the team had previously relied on four-stroke vertical twins. Greeves produced three special machines for the event, which was held in the Czechoslovakian mountains. The engines were highly modified Villiers MK 36A but instead of the standard Villiers crankshaft they had an Alpha assembly and the squared-off cylinder barrels and heads were cast in Bert Greeves' own foundry and painted with matt black heat-dispersing paint. Although one of the riders, Triss Sharp, had starting problems, his brother Brian Sharp and the third rider Peter Stirland both won gold medals. The only woman to compete in the event was also riding a Greeves machine and won a bronze medal.
Greeves also made a successful entry into road racing with the 250 cc Silverstone model. Although these were not as fast as some of their competitors, they earned a reputation for reliability and were chosen to be the standard motorcycles for the Mortimer Road-Racing School. As well winning the 1964 Manx Grand Prix
, Gordon Keith also took the Greeves racer to the fastest lap of the race at 87.6 miles per hour (39.2 m/s), which proved to be the best speed ever by a British 250 cc motorcycle. As well as a boot for the Greeves factory, this was an important win when the sport was beginning to become dominated by foreign motorcycles. This led to a lot of interest in the Greeves road bikes, including from a number of British Police forces for a version of the bigger twin equipped with a radio.
Also in 1964 Greeves launched the 'Challenger', and first time out ridden by Garth Wheldon it won the Terry Cups Trail. In 1967, a 346 cc version of the successful Challenger was launched, together with a 350 cc road racer called the 'Oulton'. A special export model called the 'Ranger' was also developed but by 1968 Villiers had pulled out of engine production and Greeves decided to leave the trails motorcycle market to concentrate on the development of a motorcross model.
As the Japanese entered the market place - Suzuki
dominated the European Championships from 1970 to 1973 - sales began to slow. They were successful in winning an important order to supply the Royal Artillery
Motorcycle Display Team with motorcycles and developed the 'Greeves Griffons' but a change in the law meant that the Invacar, which had been the mainstay of the company (even at the peak of motorcycle production Bert Greeves still answered the telephone as "Invacar Limited") was no longer legal for road use so the Ministry of Pensions decided to replace it with a four wheeled car. Bert Greeves decided that it was time to retire from the business and was soon followed by his cousin Derry Preston-Cobb. The company floundered in 1976 and after a fire at the factory were unable to resume production and went into receivership.
s of the Greeves name in the UK, USA and Europe, a new Greeves company was founded in Chelmsford
which restarted production of mainly trials models. The new company started building, and rebuilding, Greeves Motorcycles from 2000 and run a parts mail order business. Continuing a tradition started by Bert Greeves, the heads, barrels, crankcases, and aluminium beams are all manufactured from new castings in a specialist alloy foundry.
, engineers from Greeves worked alongside students studying for the Rapid Product Development MSc to design and develop a completely new 280 cc lightweight two-stroke engine. To enable existing components to be used in the new engine parts were scanned using the Centre’s Renishaw Cyclone Reverse Engineering machine. Rapid prototyping
models of the new engine were then manufactured on the Centre’s 3D printing machine to check for fit before manufacture of prototype cast metal parts.
Local foundry GPD Developments Ltd in Nuneaton
, Warwickshire
manufactured the castings using a new method of printing sand moulds directly from computer-aided design
(CAD) data. Prototype sand moulds were produced using this new technique from which the prototype parts were cast. After testing and further development and testing Greeves launched the new 280 cc Trials bike at the Classic Off-Road show at Telford in 2009. The result of over six thousand hours of design and development work costing over £100,000, the new 280 has a high specification with Marzocchi
Aluminium forks and Dellorto Carburettor. The frame, headstock, swinging arm, footrest hangars and engine components are all made from 6063 aerospace standard high grade aluminium (building on a Greeves tradition] and an unusual feature is that the fuel tank is close to the rear wheel to reduce the centre of gravity. A centrally mounted shock absorber on the swinging arm helps manoeuvrability.
Motorcycle
A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...
manufacturer producing motorcycles mainly for the trials
Motorcycle trials
Motorcycle trials, also termed observed trials, is a non-speed event on specialized motorcycles. The sport is most popular in the United Kingdom and Spain, though there are participants around the globe....
and off-road market. Owner Richard Deal bought the rights to the Greeves name in May 1999. The original company had been producing motorcycles since 1952, funded by a contract with the Ministry of Pensions
Ministry of Pensions and National Insurance
The Ministry of Pensions and National Insurance or MPNI was a British government ministry responsible for the administration and delivery of welfare benefits...
for their Invacar
Thundersley Invacar
The AC/Thundersley Invacar was a small car specially adapted for use by disabled drivers.- History :In 1948, Bert Greeves adapted a motorbike with the help of his paralysed cousin Derry Preston-Cobb as transport for Derry...
. a three wheeler for disabled drivers. After many wins in motorcycle trials competitions and developing a successful US export market the original company ceased trading following a fire in 1977. The new company continues to develop motorcycles and launched the first new Greeves Trials Bike for 20 years in January 2009, with an innovative all new British two-stroke 280 cc engine.
History
Bert Greeves
Oscar Bertram "Bert" Greeves MBE was a British engineer who founded Invacar Ltd in 1942 and Greeves motor cycles in 1953. He was appointed MBE in 1972. Married twice with one daughter, he died on the 15 July 1993.-Early life:...
MBE
MBE
MBE can stand for:* Mail Boxes Etc.* Management by exception* Master of Bioethics* Master of Bioscience Enterprise* Master of Business Engineering* Master of Business Economics* Mean Biased Error...
was the Invacar company. Greeves was mowing the lawns of his home in Worcestershire
Worcestershire
Worcestershire is a non-metropolitan county, established in antiquity, located in the West Midlands region of England. For Eurostat purposes it is a NUTS 3 region and is one of three counties that comprise the "Herefordshire, Worcestershire and Warwickshire" NUTS 2 region...
when he had the idea of fitting the lawnmower engine to his disabled cousin's wheelchair and invented the Invacar. Invacar Ltd was set up and won a major contract to provide motorised three wheeled invalid carriage vehicles to the UK Government Ministry of Pensions and National Insurance. in 1952 from a small factory in Church Road, Thundersley
Thundersley
Thundersley is a district in the north west of the Castle Point Borough, in south east Essex, England, about 35 miles east of London.-Toponymy:...
not far from Southend on Sea in Essex
Essex
Essex is a ceremonial and non-metropolitan county in the East region of England, and one of the home counties. It is located to the northeast of Greater London. It borders with Cambridgeshire and Suffolk to the north, Hertfordshire to the west, Kent to the South and London to the south west...
.
Encouraged by this success, Bert Greeves decided to diversify into motorcycle manufacture. A keen trials rider in his spare time, he had started collecting veteran and vintage motorcycles, including a 1912 Triumph with the registration 'OLD 1'. His disabled cousin Derry Preston-Cobb also encouraged him to start the motorcycle business. Derry's own Invacar was used as a promotional vehicle and had been fitted with a more powerful engine, which he used to amazed other drivers as he overtook them on the Southend roads. Working together they developed a prototype using a two-stroke 197 cc single-cylinder engine sourced from Villiers Engineering
Villiers Engineering
Villiers Engineering was a manufacturer of motorcycles and cycle parts, and an engineering company based in Villiers Street, Wolverhampton, England....
- and a Greeves badge on the fuel tank. The motorcycles were really a sideline for the main business of producing the three-wheeled invalid cars, so development of the prototypes had to be fitted in when the production schedule allowed. Bert had been an enthusiastic motorcyclist in his youth and always had an ambition to become a motorcycle manufacturer. The first Greeves motorcycle was developed in mid-1951, using rubber-in-torsion springing at both front and rear. This unconventional rubber springing came straight from the patented system used for the invalid car. Rear wheel suspension was by a pivoted fork with rods connecting to torsion rubber mounted units just below the seat. Friction dampers were also fitted which could be manually adjusted. The front forks were also unusual, with short leading links to carry the wheel, pivoting on rubber-in-torsion spring units (later known as the 'Banana Leading Link' front fork. Motorcycle production began in the autumn of 1953 and the new models featured a unique frame with the steering head and a massive front down member combined in a large 'I-section' cast alloy beam, cast in a new light-alloy foundry that had been added to the Greeves factory. The tubular frame member was inserted into a mould and the main frame was cast around it, making for a very strong frame. Made from LM6 silicon-aluminium alloy, it was claimed to be stronger than tubular steel and proved capable of standing up to the rough treatment of international off road trials competition. Protection was finished off with reinforced engine cradle plates which were also light alloy castings.
Derry Preston-Cobb was made Sales Manager for the motorcycle business and they started with three models, a scrambler, a three speed road bike and a four-speed version. At the 1954 Earls Court
Earls Court Exhibition Centre
The Earls Court Exhibition Centre is an exhibition centre, conference and event venue located in west London, United Kingdom in the Royal Borough of Kensington and Chelsea . It is the largest exhibition venue in central London. It is served by two underground stations, Earl's Court and West...
Show, they also launched the 'Fleetwing', a two-cylinder two-stroke with a 242 cc British Anzani
Anzani
Anzani was an engine manufacturer founded by the Italian Alessandro Anzani , which produced proprietary engines for aircraft, cars, boats, and motorcycles in factories in Britain, France and Italy.-Overview:...
engine developed from those used for motor boats and featuring a crankshaft with a hollow mid section that acted as a rotary inlet valve. With a top speed of just 61 mph (27.3 m/s), the Fleetwing continued in production until 1956 when the stock of British Anzani engines was finally exhausted. The Fleetwing name was brought back in 1957, however, for the Villiers
Villiers
-Places:In Canada* Villiers, Ontario, a small settlement near PeterboroughIn France* Villiers, Indre, in the Indre département* Villiers, Vienne, in the Vienne département* Villiers-Adam, in the Val-d'Oise département...
engined 249 cc model. This was more powerful than the earlier Fleetwing and now had a more respectable top speed of 70 miles per hour (31.3 m/s). Gearboxes were supplied by Albion Motors
Albion Motors
Albion Automotive of Scotstoun, Glasgow is a former Scottish automobile and commercial vehicle manufacturer, currently involved in the manufacture and supply of Automotive component systems....
, later replaced by their own designs from 1964 forward. The lightweight high powered package made them successful in the trials
Motorcycle trials
Motorcycle trials, also termed observed trials, is a non-speed event on specialized motorcycles. The sport is most popular in the United Kingdom and Spain, though there are participants around the globe....
market place against Triumph and BSA
Birmingham Small Arms Company
This article is not about Gamo subsidiary BSA Guns Limited of Armoury Road, Small Heath, Birmingham B11 2PP or BSA Company or its successors....
models.
By 1962 there were eleven models in the Greeves range. The offroad motorcycles were also developed through an association with Queen's University Belfast producing the later Greeves QUB model. The last of the Challenger models was produced in 1968, replaced by the 250 and 380 cc Griffon motocrossers in 1969. The original leading link fork was no longer fitted, having been replaced by standard telescopic forks as the leading link design could not match the travel of forks. Also abandoned was the original cast alloy front down beam, replaced with a new frame of Reynolds 531 chrome molybdenum with a conventional down tube.
Greeves also built a successful export business and at one time most of the motorcycles produced were going to the United States. Greeves became so successful in the US that they had a significant influence on the growth of the off-road biking sport and with the invention of the trail bike with their road legal off-roader, the Ranger.
Competition success
It was off-road competition that was to dominate Greeves production, and in 1956 Greeves signed motocrossMotocross
Motocross is a form of motorcycle sport or all-terrain vehicle racing held on enclosed off road circuits. It evolved from trials, and was called scrambles, and later motocross, combining the French moto with cross-country...
rider Brian Stonebridge
Brian Stonebridge
Brian Stonebridge was a leading British motorcycle racer of the 1950s competing in scrambles, now known as motocross.Stonebridge began riding for the Matchless scrambles team in 1950, winning a gold medal in that year's International Six Days Trial. In 1952 and 1954, he was a member of the British...
and started competing in the European Motocross Championship. Stonebridge became the company Competitions Manager and Development Engineer, as he was a skilled two-stroke tuning specialist and was able to significantly improve the performance of the Villiers engines. In April 1957 Brian Stonebridge managed to beat the 500 cc bikes on the much smaller capacity Greeves round the demanding and hilly Hawkstone Park
Hawkstone Park Motocross Circuit
Hawkstone Park Motocross Circuit, typically referred to as Hawkstone Park or Hawkstone, is a motocross circuit situated near Market Drayton, north Shropshire, England...
course, winning the 350 cc race and coming second in the 500 cc race, establishing Greeves' reputation as true off-road competition motorcycles. The next Greeves model was called the 'Hawkstone'; to capitalise on this success and the company began to specialise in motocross motorcycles, ridden by champions including Peter Hammond, Jack Simpson and Norman Sloper .
Stonebridge led a three-man Greeves team to the West German International Six Days Trial
International Six Days Enduro
The International Six Days Enduro is the oldest 'off road' motorcycle event on the FIM Calendar.The ISDE was first held in 1913 at Carlisle, England. It has occurred annually, apart from interruptions due to World War I and World War II, at various locations throughout the world. The early...
event in 1958 and had a faultless ride, winning another gold medal. In October 1959, tragedy struck the Greeves team when Brian Stonebridge was killed in a car accident. Bert Greeves was at the wheel and Stonebridge was in the passenger seat when they crashed returning from a visit to a factory in Bradford
Bradford
Bradford lies at the heart of the City of Bradford, a metropolitan borough of West Yorkshire, in Northern England. It is situated in the foothills of the Pennines, west of Leeds, and northwest of Wakefield. Bradford became a municipal borough in 1847, and received its charter as a city in 1897...
. In a head-on collision Bert was only slightly injured but in the days before seat belts it proved fatal for Brian, who died at the scene of the accident.
After the death of Stonebridge, Greeves signed Dave Bickers, who won the 1960 and 1961 250 cc championship. The company went on to win the Manx Grand Prix
Manx Grand Prix
The Manx Grand Prix motorcycle races are held on the Isle of Man TT Course every year for a two-week period usually spanning the end of August and early September. The 'MGP' or 'Manx' is considered to be the amateur riders' alternative to the Isle of Man TT Races held in May and June...
, the Scott Trial
Scott Trial
The Scott Trial is a British motorcycle trials competition run over an off road course of approximately 70 miles. One of the most challenging trials events in the UK its appeal is to clubman riders as well as international professional riders...
, the European Trials Championship and the Scottish Six Days Trial
Scottish Six Days Trial
The Scottish Six Days Trial is an internationally recognised Motorcycle trials competition, which has been running since 1909 making it the oldest motorcycle trials event in the world...
, winning gold medals in the ISDT and the ACU 250 cc Road Race. Bert Greeves also managed to sign up Bill Wilkinson, the Yorkshire
Yorkshire
Yorkshire is a historic county of northern England and the largest in the United Kingdom. Because of its great size in comparison to other English counties, functions have been increasingly undertaken over time by its subdivisions, which have also been subject to periodic reform...
trials rider who made the headlines when he won the British Experts Trail competition in 1960, the first time it had ever been won on a two-stroke motorcycle and a significant result for the Greeves factory.
Greeves also made a successful entry into road racing with the 250 cc Silverstone model. Although these were not as fast as some of their competitors, they earned a reputation for reliability and were chosen to be the standard motorcycles for the Mortimer Road-Racing School. As well winning the 1964 Manx Grand Prix
Manx Grand Prix
The Manx Grand Prix motorcycle races are held on the Isle of Man TT Course every year for a two-week period usually spanning the end of August and early September. The 'MGP' or 'Manx' is considered to be the amateur riders' alternative to the Isle of Man TT Races held in May and June...
, Gordon Keith also took the Greeves racer to the fastest lap of the race at 87.6 miles per hour (39.2 m/s), which proved to be the best speed ever by a British 250 cc motorcycle. As well as a boot for the Greeves factory, this was an important win when the sport was beginning to become dominated by foreign motorcycles. This led to a lot of interest in the Greeves road bikes, including from a number of British Police forces for a version of the bigger twin equipped with a radio.
Also in 1964 Greeves launched the 'Challenger', and first time out ridden by Garth Wheldon it won the Terry Cups Trail. In 1967, a 346 cc version of the successful Challenger was launched, together with a 350 cc road racer called the 'Oulton'. A special export model called the 'Ranger' was also developed but by 1968 Villiers had pulled out of engine production and Greeves decided to leave the trails motorcycle market to concentrate on the development of a motorcross model.
End of an era
Suzuki
is a Japanese multinational corporation headquartered in Hamamatsu, Japan that specializes in manufacturing compact automobiles and 4x4 vehicles, a full range of motorcycles, all-terrain vehicles , outboard marine engines, wheelchairs and a variety of other small internal combustion engines...
dominated the European Championships from 1970 to 1973 - sales began to slow. They were successful in winning an important order to supply the Royal Artillery
Royal Artillery
The Royal Regiment of Artillery, commonly referred to as the Royal Artillery , is the artillery arm of the British Army. Despite its name, it comprises a number of regiments.-History:...
Motorcycle Display Team with motorcycles and developed the 'Greeves Griffons' but a change in the law meant that the Invacar, which had been the mainstay of the company (even at the peak of motorcycle production Bert Greeves still answered the telephone as "Invacar Limited") was no longer legal for road use so the Ministry of Pensions decided to replace it with a four wheeled car. Bert Greeves decided that it was time to retire from the business and was soon followed by his cousin Derry Preston-Cobb. The company floundered in 1976 and after a fire at the factory were unable to resume production and went into receivership.
New Greeves
The old Greeves motorcycles were, however, ideal for the new "classic" class of trials. However, parts were scarce and expensive, and trials rider Richard Deal started producing replica parts, and then a replica motorcycle called the Greeves Anglian. In May 1999, after gaining control of the trademarkTrademark
A trademark, trade mark, or trade-mark is a distinctive sign or indicator used by an individual, business organization, or other legal entity to identify that the products or services to consumers with which the trademark appears originate from a unique source, and to distinguish its products or...
s of the Greeves name in the UK, USA and Europe, a new Greeves company was founded in Chelmsford
Chelmsford
Chelmsford is the county town of Essex, England and the principal settlement of the borough of Chelmsford. It is located in the London commuter belt, approximately northeast of Charing Cross, London, and approximately the same distance from the once provincial Roman capital at Colchester...
which restarted production of mainly trials models. The new company started building, and rebuilding, Greeves Motorcycles from 2000 and run a parts mail order business. Continuing a tradition started by Bert Greeves, the heads, barrels, crankcases, and aluminium beams are all manufactured from new castings in a specialist alloy foundry.
The new 280 cc
By 2009, the company had built 22 Greeves Anglian motorcycles and four Greeves Pathfinders, as well as numerous restoration projects. In 2007 Richard Deal decided to develop the first completely new Greeves trials motorcycle for over 20 years. Working with the Rapid Product Development Group at DeMontfort University in LeicesterLeicester
Leicester is a city and unitary authority in the East Midlands of England, and the county town of Leicestershire. The city lies on the River Soar and at the edge of the National Forest...
, engineers from Greeves worked alongside students studying for the Rapid Product Development MSc to design and develop a completely new 280 cc lightweight two-stroke engine. To enable existing components to be used in the new engine parts were scanned using the Centre’s Renishaw Cyclone Reverse Engineering machine. Rapid prototyping
Rapid prototyping
Rapid prototyping is the automatic construction of physical objects using additive manufacturing technology. The first techniques for rapid prototyping became available in the late 1980s and were used to produce models and prototype parts. Today, they are used for a much wider range of applications...
models of the new engine were then manufactured on the Centre’s 3D printing machine to check for fit before manufacture of prototype cast metal parts.
Local foundry GPD Developments Ltd in Nuneaton
Nuneaton
Nuneaton is the largest town in the Borough of Nuneaton and Bedworth and in the English county of Warwickshire.Nuneaton is most famous for its associations with the 19th century author George Eliot, who was born on a farm on the Arbury Estate just outside Nuneaton in 1819 and lived in the town for...
, Warwickshire
Warwickshire
Warwickshire is a landlocked non-metropolitan county in the West Midlands region of England. The county town is Warwick, although the largest town is Nuneaton. The county is famous for being the birthplace of William Shakespeare...
manufactured the castings using a new method of printing sand moulds directly from computer-aided design
Computer-aided design
Computer-aided design , also known as computer-aided design and drafting , is the use of computer technology for the process of design and design-documentation. Computer Aided Drafting describes the process of drafting with a computer...
(CAD) data. Prototype sand moulds were produced using this new technique from which the prototype parts were cast. After testing and further development and testing Greeves launched the new 280 cc Trials bike at the Classic Off-Road show at Telford in 2009. The result of over six thousand hours of design and development work costing over £100,000, the new 280 has a high specification with Marzocchi
Marzocchi
Marzocchi is an Italian manufacturer founded in 1949 by the two brothers Stefano and Guglielmo Marzocchi. The company profile includes hydraulic industrial pumps and suspension components for motorcycles and bicycles...
Aluminium forks and Dellorto Carburettor. The frame, headstock, swinging arm, footrest hangars and engine components are all made from 6063 aerospace standard high grade aluminium (building on a Greeves tradition] and an unusual feature is that the fuel tank is close to the rear wheel to reduce the centre of gravity. A centrally mounted shock absorber on the swinging arm helps manoeuvrability.
External links
- New Greeves Motorcycles
- Greeves Motorsport
- Video of Greeves 50th Anniversary meeting at BattlesbridgeBattlesbridgeBattlesbridge is a village in Essex, England, through which the River Crouch flows.The bridge over the tidal River Crouch was kept in repair from the earliest days by the Bataille family, hence the name of the hamlet...
- 6 July 2003