Grand Prix motorcycle racing refers to the premier category of motorcycle road racing, currently divided into three distinct classes: 125 cc, 250 cc and MotoGP. Grand prix motorcycles are purpose-built racing machines that are neither available for general purchase nor can be legitimately ridden on public roads; this contrasts with the various production categories of racing, such as World Superbike, that feature modified versions of road-going motorcycles available to the public.
Contents [hide] 1 Overview2 Riders3 Challenges for the Designer4 Specifications 4.1 125 cc and 250 cc Classes4.2 MotoGP Class4.3 Weights 5 Scoring6 Movies & Video Games7 Notes8 External links // [edit] Overview A World Championship for motorcycle racing was first organized by the Fédération Internationale de Motocyclisme (FIM) in 1949. The commercial rights are owned by Dorna Sports. There have traditionally been several races at each event for various classes of motorcycles, based on engine size, and one class for sidecars. Classes for 50 cc, 80 cc, 125 cc, 250 cc, 350 cc, and 500 cc solo machines have existed over time, and 350 cc and 500 cc sidecars. Up through the 1950s and most of the 1960s, four-stroke engines dominated all classes. In the 1960s, two-stroke engines began to take root in the smaller classes. By the 1970s, two-strokes completely eclipsed the four-strokes. In 1979, Honda made an attempt to return the four-stroke to the top class with the NR500, but this project failed, and in 1983, even Honda was winning with a two-stroke 500. The 50-cc class was replaced by an 80-cc class, then the class was dropped entirely in the 1990s, after being dominated primarily by Spanish and Italian makes.
The 350-cc class vanished in the 1980s. Sidecars were dropped from World Championship events in the 1990s (see superside), reducing the field to 125s, 250s, and 500s. Yamaha YZR-M1 MotoGP bike MotoGP, the premier class of GP motorcycle racing, has changed dramatically in recent years. From the mid-1970s until 2002 the top class of GP racing allowed 500 cc with a maximum of 4 cylinders, regardless of whether the engine was a two-stroke or four-stroke. Consequently, all machines were two-strokes, due to the greater power output for a given engine capacity. Some two- and three-cylinder two-stroke 500s were seen, but though they had a minimum-weight advantage under the rules, typically attained higher corner speed and could qualify well, they lacked the power of the four-cylinder machines. In 2002, rule changes were introduced to facilitate the phasing out of the two strokes, probably influenced by what was then seen as a lack of relevance: the last mass-produced 500 cc 2-stroke model had not been available to the public for some 15 years. The rules permitted manufacturers to choose between running two-strokes engines (500 cc or less) or four-strokes (990 cc or less). Manufacturers were also permitted to employ their choice of engine configuration. Despite the significantly increased costs involved in running the new four-stroke machinery, given their extra 490-cc capacity advantage, the four-strokes were soon able to dominate their two-stroke rivals. As a result, by 2003 no two-stroke machines remained in the MotoGP field. The 125-cc and 250-cc classes still consist exclusively of two-stroke machines. In 2007, the MotoGP class had its maximum engine displacement capacity reduced to 800 cc. In the smaller classes it is also intended to phase out two strokes from around 2010. The 125 and 250 classes eventually being replaced by 4-strokes of around 400- & 600-cc capacity. The current racing calendar consists of 18 rounds in 16 different countries (Spain which hosts 3 rounds, Qatar, Turkey, China, France, Italy, Great Britain, Netherlands, Germany, Czech Republic, San Marino, Portugal, Japan, Australia and Malaysia). Exclusive to the MotoGP class, there is also a USA round at Mazda Raceway Laguna Seca in Monterey, California. The grid is composed of 3 columns (4 for the 125 cc class) and contains approximately 20 riders. Grid positions are decided in descending order of qualifying speed, the fastest on the 'pole' or first position. Races last approximately 45 minutes, each race a sprint from start to finish without pitting for fuel or tyres. Tyre selection is critical, usually done by the individual rider based on bike 'feel' during practice, qualifying and the pre-race warm-up laps on the morning of the race, as well as the predicted weather.
The typical compromise is between grip and longevity--the softer and 'grippier' the tyre, the more quickly it wears out; the harder and less grippy, the more likely the tyre is to last the entire race. Special 'Q' or qualifying tyres of extreme softness and grip are typically used by riders during grid-qualifying sessions, but they last typically no longer than one or two laps, though they may deliver higher qualifying speed. For wet conditions, special tyres ('wets') with full treads are used, but they suffer extreme wear if the track dries out. New tire regulations introduced in 2007 limited the number of tires any rider could use over the practice and qualifying period, and the race itself, introducing a problem of tire choice vs. weather (among other factors) that challenges riders and teams to optimize their performance on race day. This factor was greeted with varying degrees of enthusiasm by participants. In 2005, a flag-to-flag rule for MotoGP was introduced. Previously, if a race started dry and rain appeared, riders or officials could red-flag (stop) the race and begin again on wet tyres. Now, if it begins to rain there is no red flag, though riders can pit to change their tyres at their discretion (and if a white flag is waved by officials). When a rider crashes, track marshals wave a yellow flag, prohibiting passing in that area; one corner back, a stationary yellow flag is shown and passing in this area of the track is prohibited; if a fallen rider cannot be safely evacuated from the track, the race is red-flagged. Motorcycle crashes are usually one of two types: lowsides and the more dangerous highsides, though increased use of traction control has made highsides much less frequent. According to one estimate, leasing a top-level motorcycle for a rider is about 3 to 3.5 million dollars.[1] [edit] Riders The full list of current and historic motorcycle racers can be found at List of Grand Prix motorcycle racers. The top riders travel the world to compete in the annual FIM World Championship series. The circuit is perhaps most closely followed in Italy and Spain, home of many of the more successful riders at the moment. However, over the last couple of years there has been an increase in the number of riders competing from the USA. This has resulted in the reintroduction in 2005 of the US Grand Prix (albeit just for the MotoGP class, not 125 cc & 250 cc), an event staged at Laguna Seca where American Nicky Hayden took his maiden MotoGP victory. Another American, Colin Edwards, gained second place in that race. In 2006, Hayden repeated his winning performance at Laguna Seca, despite serious difficulties with the track that--though repaved in June 2006, and incorporating improved safety features--exhibited serious problems with surface deterioration. Hayden went on to win the GP championship of 2006, with winner of the past 5 titles, Valentino Rossi, coming in second. The premier class in past seasons has been dominated by Italian Valentino Rossi, winner of the 2001 to 2005 titles. In an effort to beat Valentino's amazing consecutive victories, other companies have signed younger riders on newly designed machines. Honda in particular have taken this approach, with their 2006 racing plans being specific about winning with 'next-generation' teams, signing Toni Elias, Marco Melandri, Dani Pedrosa, and Nicky Hayden, all of whom are under 25. The 2006 championship was the first in 14 years to be decided at the final race, with Valentino Rossi starting the race with an 8 point lead. Hayden finished 3rd with Rossi finishing 13th after crashing on lap 5 to give Nicky Hayden his maiden MotoGP World Championship title.
Challenges for the Designer Cockpit of a GP-racing motorcycle Like Formula One cars, grand prix motorcycles are made not only to be raced but to demonstrate the technical and design prowess of the manufacturer. As a result, MotoGP machines are generally made of lightweight and expensive materials such as titanium and carbon-fiber-reinforced plastic. They regularly feature technology not available to the general public. Examples of this include sophisticated electronics, including telemetry, engine management systems and traction control, carbon disk brakes, and advanced engine technology such as those seen on Honda's V5 RC211V and Aprilia's RS3 Cube. The latter employs the Cosworth-designed pneumatic valve actuation system, used in Formula One cars. The latest addition to the MotoGP grids, the Ilmor/SRT X3 machine, seen at the Estoril (Portugal) and Valencia (Spain) events in 2006, reportedly uses a similar valve-actuation design, not surprising considering Ilmor Engineering's background in Formula One. While MotoGP motorcycles are only raced at world championship level, the lighter and significantly less powerful 125 cc and 250 cc bikes are available at relatively reasonable cost. A basic production 125 cc bike costs about the same as a small car. These bikes are raced in national championships around the world as well as in the world championship, though their two-stroke technology is irrelevant in context with production machines. These two smaller classes are considered excellent training for future MotoGP riders. One of the main challenges that confronts a MotoGP motorcycle rider and designer is how to translate the machine's enormous power - over 240 horsepower (179 kW), through a single tyre-contact patch roughly the size of a human hand. For comparison, Formula 1 cars produce up to 750 bhp (560 kW) from their 2.4 litre engines, but have 10 times the tyre-contact surface. Because of this difficulty, MotoGP is perhaps unique in modern motor sport in that teams will often deliberately detune their engines to allow their riders a chance to control them. In the two-stroke era, many of the 500 cc machines were not making more than the 180 to 190 bhp (135 to 140 kW) although their maximum potential power output was higher. In recent times this has begun to change with the advent of traction control.
Part of the rider compromise, significantly affected by ECU (Engine Control Unit) technology, is that explosive torque at lower RPM may cause the rear tyre to spin unless modulated, causing riders to use higher RPM where torque changes are less severe. This consideration also affects gear selection for the individual circuit, which comprises an essential element in setup before and during practice and qualification. [edit] Specifications The following shows the key specifications issues for each class. It was also introduced for the 2005 year, that under rule 2.10.5: 'No fuel on the motorcycle may be more than fifteen °C (15 °C) below ambient temperature. The use of any device on the motorcycle to artificially decrease the temperature of the fuel below ambient temperature is forbidden. No motorcycle may include such a device.' This stops an artificial "boost" gained by increasing fuel density by cooling it. [edit] 125 cc and 250 cc Classes 125 cc KTM Grand Prix motorcycle 125 cc machines are restricted to a single cylinder and a minimum weight of 80 kilograms and the 250 cc machines to two cylinders and a minimum of 100 kilograms. From 2005 onwards, all riders in the 125 cc class could not be older than 28 years or 25 years for new contracted riders participating for the first time and wild-cards. [edit] MotoGP Class New specifications for each racing class are formed as the FIM sees fit. At the beginning of the new MotoGP era in 2002, 500 cc two-stroke or 990 cc four-stroke bikes were specified to race. The enormous power advantage of the larger displacement four-stroke engine over the two-stroke eliminated all two-strokes from competition; the following season no two-stroke bikes were racing. In 2007 the maximum engine capacity was reduced to 800 cc without reducing the existing weight restrictions.
MotoGP class motorcycles are not restricted to any specific engine configuration. Rather, the motorcycle's minimum weight is restricted depending on the number of cylinders. This is because an engine with more cylinders for a given capacity is capable of producing more power more easily. The greater the number of cylinders for a given capacity translates to less capacity per cylinder. As a result, the piston for the resulting smaller cylinder is also smaller, weighing less. Less recriprocating mass (such as pistons) require less energy to move and this aids to the engine being capable of achieving higher revolutions per minute and, hence, greater power. For this reason, the weight limit is increased as a form of handicap. In 2004 motorcycles were entered with three-, four-and five-cylinder configurations. A six-cylinder engine was proposed by the Blata, but did not reach the MotoGP grids. The FIM has become concerned, much as the FIA in Formula One, at the advances in design and engineering that result in higher speeds all around the race track since 2002. The current MotoGP speed record of 347.4 km/h (215.864 mph) was set by Loris Capirossi on a Ducati Desmosedici GP4 at IRTA Tests in Catalunya in 2004. By way of comparison, the current Formula One speed record of 369.9 km/h (229.8 mph) was set by Antonio Pizzonia of the BMW Williams F1 team, at Monza in 2004. To ensure safety, they have agreed upon a set of regulation changes to reduce motorcycle speeds. These include changes in weight, fuel and engine capacity. [edit] Weights Minimum Weight - MotoGP Class # of Cylinders 2004 Min 2007 Min Difference 2 Cylinder 135 kg 137 kg 2 kg 3 Cylinder 135 kg 140.5 kg 5.5 kg 4 Cylinder 145 kg 148 kg 3 kg 5 Cylinder 145 kg 155.5 kg 10.5 kg 6 Cylinder 155 kg 163 kg 8 kg In 2005, fuel tank capacity was reduced by 2 litres to 24 litresIn 2006, fuel tank capacity was reduced by a further 2 litres to 22 litresFrom 2007 onwards and for a minimum period of five years, FIM has regulated in MotoGP class that two-stroke bikes will no longer be allowed, and engines will be limited to 800 cc four-strokes. The maximum fuel capacity will be 21 litres. [edit] Scoring Points Scoring - MotoGP Class Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Points 25 20 16 13 11 10 9 8 7 6 5 4 3 2 1 [edit] Movies & Video Games Movies about MotoGP include: Faster, a documentary film about MotoGP, was released in 2003 and is now available on DVD. The film features appearances by MotoGP's biggest stars, including Valentino Rossi. Narrated by Ewan McGregor and directed by Mark Neale.The Doctor, The Tornado and The Kentucky Kid, a documentary on the 2005 USGP, also directed by Mark Neale. Video games based upon MotoGP: PC GP500: (Microprose) Xbox and PC MotoGP: Ultimate Racing Technology (THQ)MotoGP 2 (THQ)MotoGP 3: Ultimate Racing Technology (THQ) Xbox 360 and PC MotoGP 2006 (THQ)MotoGP 2007 (THQ) PlayStation 2 MotoGP (Namco)MotoGP 2 (Namco)MotoGP 3 (Namco)MotoGP 4 (Namco) PlayStation Portable MotoGP (Namco) [edit] Notes ^ THE IDIOT’S GUIDE TO MOTOGP: How to increase costs and decrease speed (Part II) SpeedTV.com Moto GP News 3 January 2006. "The move to four strokes meant that Japanese R & D departments could finally get back to blue sky engineering, building racing prototypes for the sole purpose of racing. It meant that costs of leased machines increased exponentially too. When the new rules were first adopted teams were told to expect modest increases in lease costs of 25% to 33%. Add a zero and you have the real increase…the days of the $800,000 to 1.2 million dollar lease have given way to a price tag of somewhere between 3 and 3.5 million (depending upon the level of machine and the amount of spares and maintenance included) for a couple of RC211V for a single rider. " [edit] External links MotoGPMagazine.com MotoGP Insider Magazine Online 2007Book Review: MotoGP Technology: The Official Book (Hardcover)Official MotoGP website rider info, results, and archivesCrash.Net News, interviews, radio and pictures for MotoGP, WSBK, BSB and moreGPUpdate.net For MotoGP news, results, photos and moreMoto GP 800 news, photos, resultsMotoGP Pocket Pocket PC Calendar
Grand Prix motorcycle racing 1949 • 1950 • 1951 • 1952 • 1953 • 1954 • 1955 • 1956 • 1957 • 1958 • 1959 • 1960 • 1961 • 1962 • 1963 • 1964 • 1965 • 1966 • 1967 • 1968 • 1969 • 1970 • 1971 • 1972 • 1973 • 1974 • 1975 • 1976 • 1977 • 1978 • 1979 • 1980 • 1981 • 1982 • 1983 • 1984 • 1985 • 1986 • 1987 • 1988 • 1989 • 1990 • 1991 • 1992 • 1993 • 1994 • 1995 • 1996 • 1997 • 1998 • 1999 • 2000 • 2001 • 2002 • 2003 • 2004 • 2005 • 2006 • 2007 Retrieved from "http://en.wikipedia.org/wiki/Grand_Prix_motorcycle_racing" Category: Grand Prix motorcycle racing Views ArticleDiscussionEdit this pageHistory Personal tools Sign in / create account if (window.isMSIE55) fixalpha(); Navigation Main pageContentsFeatured contentCurrent eventsRandom article interaction About WikipediaCommunity portalRecent changesFile upload wizardContact usMake a donationHelp Search Toolbox What links hereRelated changesUpload fileSpecial pagesPrintable versionPermanent linkCite this article In other languages العربيةCatalàDeutschEspañolFrançaisBahasa IndonesiaItalianoעבריתNederlands日本語PolskiPortuguêsРусскийSlovenščinaSuomiTürkçe中文
Contents [hide] 1 Overview2 Riders3 Challenges for the Designer4 Specifications 4.1 125 cc and 250 cc Classes4.2 MotoGP Class4.3 Weights 5 Scoring6 Movies & Video Games7 Notes8 External links // [edit] Overview A World Championship for motorcycle racing was first organized by the Fédération Internationale de Motocyclisme (FIM) in 1949. The commercial rights are owned by Dorna Sports. There have traditionally been several races at each event for various classes of motorcycles, based on engine size, and one class for sidecars. Classes for 50 cc, 80 cc, 125 cc, 250 cc, 350 cc, and 500 cc solo machines have existed over time, and 350 cc and 500 cc sidecars. Up through the 1950s and most of the 1960s, four-stroke engines dominated all classes. In the 1960s, two-stroke engines began to take root in the smaller classes. By the 1970s, two-strokes completely eclipsed the four-strokes. In 1979, Honda made an attempt to return the four-stroke to the top class with the NR500, but this project failed, and in 1983, even Honda was winning with a two-stroke 500. The 50-cc class was replaced by an 80-cc class, then the class was dropped entirely in the 1990s, after being dominated primarily by Spanish and Italian makes.
The 350-cc class vanished in the 1980s. Sidecars were dropped from World Championship events in the 1990s (see superside), reducing the field to 125s, 250s, and 500s. Yamaha YZR-M1 MotoGP bike MotoGP, the premier class of GP motorcycle racing, has changed dramatically in recent years. From the mid-1970s until 2002 the top class of GP racing allowed 500 cc with a maximum of 4 cylinders, regardless of whether the engine was a two-stroke or four-stroke. Consequently, all machines were two-strokes, due to the greater power output for a given engine capacity. Some two- and three-cylinder two-stroke 500s were seen, but though they had a minimum-weight advantage under the rules, typically attained higher corner speed and could qualify well, they lacked the power of the four-cylinder machines. In 2002, rule changes were introduced to facilitate the phasing out of the two strokes, probably influenced by what was then seen as a lack of relevance: the last mass-produced 500 cc 2-stroke model had not been available to the public for some 15 years. The rules permitted manufacturers to choose between running two-strokes engines (500 cc or less) or four-strokes (990 cc or less). Manufacturers were also permitted to employ their choice of engine configuration. Despite the significantly increased costs involved in running the new four-stroke machinery, given their extra 490-cc capacity advantage, the four-strokes were soon able to dominate their two-stroke rivals. As a result, by 2003 no two-stroke machines remained in the MotoGP field. The 125-cc and 250-cc classes still consist exclusively of two-stroke machines. In 2007, the MotoGP class had its maximum engine displacement capacity reduced to 800 cc. In the smaller classes it is also intended to phase out two strokes from around 2010. The 125 and 250 classes eventually being replaced by 4-strokes of around 400- & 600-cc capacity. The current racing calendar consists of 18 rounds in 16 different countries (Spain which hosts 3 rounds, Qatar, Turkey, China, France, Italy, Great Britain, Netherlands, Germany, Czech Republic, San Marino, Portugal, Japan, Australia and Malaysia). Exclusive to the MotoGP class, there is also a USA round at Mazda Raceway Laguna Seca in Monterey, California. The grid is composed of 3 columns (4 for the 125 cc class) and contains approximately 20 riders. Grid positions are decided in descending order of qualifying speed, the fastest on the 'pole' or first position. Races last approximately 45 minutes, each race a sprint from start to finish without pitting for fuel or tyres. Tyre selection is critical, usually done by the individual rider based on bike 'feel' during practice, qualifying and the pre-race warm-up laps on the morning of the race, as well as the predicted weather.
The typical compromise is between grip and longevity--the softer and 'grippier' the tyre, the more quickly it wears out; the harder and less grippy, the more likely the tyre is to last the entire race. Special 'Q' or qualifying tyres of extreme softness and grip are typically used by riders during grid-qualifying sessions, but they last typically no longer than one or two laps, though they may deliver higher qualifying speed. For wet conditions, special tyres ('wets') with full treads are used, but they suffer extreme wear if the track dries out. New tire regulations introduced in 2007 limited the number of tires any rider could use over the practice and qualifying period, and the race itself, introducing a problem of tire choice vs. weather (among other factors) that challenges riders and teams to optimize their performance on race day. This factor was greeted with varying degrees of enthusiasm by participants. In 2005, a flag-to-flag rule for MotoGP was introduced. Previously, if a race started dry and rain appeared, riders or officials could red-flag (stop) the race and begin again on wet tyres. Now, if it begins to rain there is no red flag, though riders can pit to change their tyres at their discretion (and if a white flag is waved by officials). When a rider crashes, track marshals wave a yellow flag, prohibiting passing in that area; one corner back, a stationary yellow flag is shown and passing in this area of the track is prohibited; if a fallen rider cannot be safely evacuated from the track, the race is red-flagged. Motorcycle crashes are usually one of two types: lowsides and the more dangerous highsides, though increased use of traction control has made highsides much less frequent. According to one estimate, leasing a top-level motorcycle for a rider is about 3 to 3.5 million dollars.[1] [edit] Riders The full list of current and historic motorcycle racers can be found at List of Grand Prix motorcycle racers. The top riders travel the world to compete in the annual FIM World Championship series. The circuit is perhaps most closely followed in Italy and Spain, home of many of the more successful riders at the moment. However, over the last couple of years there has been an increase in the number of riders competing from the USA. This has resulted in the reintroduction in 2005 of the US Grand Prix (albeit just for the MotoGP class, not 125 cc & 250 cc), an event staged at Laguna Seca where American Nicky Hayden took his maiden MotoGP victory. Another American, Colin Edwards, gained second place in that race. In 2006, Hayden repeated his winning performance at Laguna Seca, despite serious difficulties with the track that--though repaved in June 2006, and incorporating improved safety features--exhibited serious problems with surface deterioration. Hayden went on to win the GP championship of 2006, with winner of the past 5 titles, Valentino Rossi, coming in second. The premier class in past seasons has been dominated by Italian Valentino Rossi, winner of the 2001 to 2005 titles. In an effort to beat Valentino's amazing consecutive victories, other companies have signed younger riders on newly designed machines. Honda in particular have taken this approach, with their 2006 racing plans being specific about winning with 'next-generation' teams, signing Toni Elias, Marco Melandri, Dani Pedrosa, and Nicky Hayden, all of whom are under 25. The 2006 championship was the first in 14 years to be decided at the final race, with Valentino Rossi starting the race with an 8 point lead. Hayden finished 3rd with Rossi finishing 13th after crashing on lap 5 to give Nicky Hayden his maiden MotoGP World Championship title.
Challenges for the Designer Cockpit of a GP-racing motorcycle Like Formula One cars, grand prix motorcycles are made not only to be raced but to demonstrate the technical and design prowess of the manufacturer. As a result, MotoGP machines are generally made of lightweight and expensive materials such as titanium and carbon-fiber-reinforced plastic. They regularly feature technology not available to the general public. Examples of this include sophisticated electronics, including telemetry, engine management systems and traction control, carbon disk brakes, and advanced engine technology such as those seen on Honda's V5 RC211V and Aprilia's RS3 Cube. The latter employs the Cosworth-designed pneumatic valve actuation system, used in Formula One cars. The latest addition to the MotoGP grids, the Ilmor/SRT X3 machine, seen at the Estoril (Portugal) and Valencia (Spain) events in 2006, reportedly uses a similar valve-actuation design, not surprising considering Ilmor Engineering's background in Formula One. While MotoGP motorcycles are only raced at world championship level, the lighter and significantly less powerful 125 cc and 250 cc bikes are available at relatively reasonable cost. A basic production 125 cc bike costs about the same as a small car. These bikes are raced in national championships around the world as well as in the world championship, though their two-stroke technology is irrelevant in context with production machines. These two smaller classes are considered excellent training for future MotoGP riders. One of the main challenges that confronts a MotoGP motorcycle rider and designer is how to translate the machine's enormous power - over 240 horsepower (179 kW), through a single tyre-contact patch roughly the size of a human hand. For comparison, Formula 1 cars produce up to 750 bhp (560 kW) from their 2.4 litre engines, but have 10 times the tyre-contact surface. Because of this difficulty, MotoGP is perhaps unique in modern motor sport in that teams will often deliberately detune their engines to allow their riders a chance to control them. In the two-stroke era, many of the 500 cc machines were not making more than the 180 to 190 bhp (135 to 140 kW) although their maximum potential power output was higher. In recent times this has begun to change with the advent of traction control.
Part of the rider compromise, significantly affected by ECU (Engine Control Unit) technology, is that explosive torque at lower RPM may cause the rear tyre to spin unless modulated, causing riders to use higher RPM where torque changes are less severe. This consideration also affects gear selection for the individual circuit, which comprises an essential element in setup before and during practice and qualification. [edit] Specifications The following shows the key specifications issues for each class. It was also introduced for the 2005 year, that under rule 2.10.5: 'No fuel on the motorcycle may be more than fifteen °C (15 °C) below ambient temperature. The use of any device on the motorcycle to artificially decrease the temperature of the fuel below ambient temperature is forbidden. No motorcycle may include such a device.' This stops an artificial "boost" gained by increasing fuel density by cooling it. [edit] 125 cc and 250 cc Classes 125 cc KTM Grand Prix motorcycle 125 cc machines are restricted to a single cylinder and a minimum weight of 80 kilograms and the 250 cc machines to two cylinders and a minimum of 100 kilograms. From 2005 onwards, all riders in the 125 cc class could not be older than 28 years or 25 years for new contracted riders participating for the first time and wild-cards. [edit] MotoGP Class New specifications for each racing class are formed as the FIM sees fit. At the beginning of the new MotoGP era in 2002, 500 cc two-stroke or 990 cc four-stroke bikes were specified to race. The enormous power advantage of the larger displacement four-stroke engine over the two-stroke eliminated all two-strokes from competition; the following season no two-stroke bikes were racing. In 2007 the maximum engine capacity was reduced to 800 cc without reducing the existing weight restrictions.
MotoGP class motorcycles are not restricted to any specific engine configuration. Rather, the motorcycle's minimum weight is restricted depending on the number of cylinders. This is because an engine with more cylinders for a given capacity is capable of producing more power more easily. The greater the number of cylinders for a given capacity translates to less capacity per cylinder. As a result, the piston for the resulting smaller cylinder is also smaller, weighing less. Less recriprocating mass (such as pistons) require less energy to move and this aids to the engine being capable of achieving higher revolutions per minute and, hence, greater power. For this reason, the weight limit is increased as a form of handicap. In 2004 motorcycles were entered with three-, four-and five-cylinder configurations. A six-cylinder engine was proposed by the Blata, but did not reach the MotoGP grids. The FIM has become concerned, much as the FIA in Formula One, at the advances in design and engineering that result in higher speeds all around the race track since 2002. The current MotoGP speed record of 347.4 km/h (215.864 mph) was set by Loris Capirossi on a Ducati Desmosedici GP4 at IRTA Tests in Catalunya in 2004. By way of comparison, the current Formula One speed record of 369.9 km/h (229.8 mph) was set by Antonio Pizzonia of the BMW Williams F1 team, at Monza in 2004. To ensure safety, they have agreed upon a set of regulation changes to reduce motorcycle speeds. These include changes in weight, fuel and engine capacity. [edit] Weights Minimum Weight - MotoGP Class # of Cylinders 2004 Min 2007 Min Difference 2 Cylinder 135 kg 137 kg 2 kg 3 Cylinder 135 kg 140.5 kg 5.5 kg 4 Cylinder 145 kg 148 kg 3 kg 5 Cylinder 145 kg 155.5 kg 10.5 kg 6 Cylinder 155 kg 163 kg 8 kg In 2005, fuel tank capacity was reduced by 2 litres to 24 litresIn 2006, fuel tank capacity was reduced by a further 2 litres to 22 litresFrom 2007 onwards and for a minimum period of five years, FIM has regulated in MotoGP class that two-stroke bikes will no longer be allowed, and engines will be limited to 800 cc four-strokes. The maximum fuel capacity will be 21 litres. [edit] Scoring Points Scoring - MotoGP Class Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Points 25 20 16 13 11 10 9 8 7 6 5 4 3 2 1 [edit] Movies & Video Games Movies about MotoGP include: Faster, a documentary film about MotoGP, was released in 2003 and is now available on DVD. The film features appearances by MotoGP's biggest stars, including Valentino Rossi. Narrated by Ewan McGregor and directed by Mark Neale.The Doctor, The Tornado and The Kentucky Kid, a documentary on the 2005 USGP, also directed by Mark Neale. Video games based upon MotoGP: PC GP500: (Microprose) Xbox and PC MotoGP: Ultimate Racing Technology (THQ)MotoGP 2 (THQ)MotoGP 3: Ultimate Racing Technology (THQ) Xbox 360 and PC MotoGP 2006 (THQ)MotoGP 2007 (THQ) PlayStation 2 MotoGP (Namco)MotoGP 2 (Namco)MotoGP 3 (Namco)MotoGP 4 (Namco) PlayStation Portable MotoGP (Namco) [edit] Notes ^ THE IDIOT’S GUIDE TO MOTOGP: How to increase costs and decrease speed (Part II) SpeedTV.com Moto GP News 3 January 2006. "The move to four strokes meant that Japanese R & D departments could finally get back to blue sky engineering, building racing prototypes for the sole purpose of racing. It meant that costs of leased machines increased exponentially too. When the new rules were first adopted teams were told to expect modest increases in lease costs of 25% to 33%. Add a zero and you have the real increase…the days of the $800,000 to 1.2 million dollar lease have given way to a price tag of somewhere between 3 and 3.5 million (depending upon the level of machine and the amount of spares and maintenance included) for a couple of RC211V for a single rider. " [edit] External links MotoGPMagazine.com MotoGP Insider Magazine Online 2007Book Review: MotoGP Technology: The Official Book (Hardcover)Official MotoGP website rider info, results, and archivesCrash.Net News, interviews, radio and pictures for MotoGP, WSBK, BSB and moreGPUpdate.net For MotoGP news, results, photos and moreMoto GP 800 news, photos, resultsMotoGP Pocket Pocket PC Calendar
Grand Prix motorcycle racing 1949 • 1950 • 1951 • 1952 • 1953 • 1954 • 1955 • 1956 • 1957 • 1958 • 1959 • 1960 • 1961 • 1962 • 1963 • 1964 • 1965 • 1966 • 1967 • 1968 • 1969 • 1970 • 1971 • 1972 • 1973 • 1974 • 1975 • 1976 • 1977 • 1978 • 1979 • 1980 • 1981 • 1982 • 1983 • 1984 • 1985 • 1986 • 1987 • 1988 • 1989 • 1990 • 1991 • 1992 • 1993 • 1994 • 1995 • 1996 • 1997 • 1998 • 1999 • 2000 • 2001 • 2002 • 2003 • 2004 • 2005 • 2006 • 2007 Retrieved from "http://en.wikipedia.org/wiki/Grand_Prix_motorcycle_racing" Category: Grand Prix motorcycle racing Views ArticleDiscussionEdit this pageHistory Personal tools Sign in / create account if (window.isMSIE55) fixalpha(); Navigation Main pageContentsFeatured contentCurrent eventsRandom article interaction About WikipediaCommunity portalRecent changesFile upload wizardContact usMake a donationHelp Search Toolbox What links hereRelated changesUpload fileSpecial pagesPrintable versionPermanent linkCite this article In other languages العربيةCatalàDeutschEspañolFrançaisBahasa IndonesiaItalianoעבריתNederlands日本語PolskiPortuguêsРусскийSlovenščinaSuomiTürkçe中文
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