Each of the regulations concerning each class is formed by the FIM race as an organization that is authorized to do it. FIM forming and issuing new regulations that are considered in accordance with the development race. At the beginning of the new MotoGP era in 2002, not 500cc motorcycle-engined 2 and 4 can not be allowed to be used in the 990cc race. Ultimate power from the motor-engine 4 stroke motorcycle engine that outperformed the two did not get rid of the whole machinery of the two no competition, and the next racing season there is no second motor was used.
In the year 2007, FIM will impose new regulations that the MotoGP bikes will be limited to 800cc 4 stroke. Reasons suggested the reduction of engine cylinder capacity is to improve driver safety, given the energy and peak velocity generated MotoGP machines has increased dramatically since 2002. MotoGP current speed record is 347.4 km / h printed by Loris Capirossi on a Ducati motorcycle circuit with Catalunya, Barcelona in 2004. As a comparison, the current F1 speed record is 369.9 km / h printed by Antonio Pizonia with BMW cars, the Monza circuit in 2004.
The decision to restrict the choice of engine capacity to 800cc (than with other methods of power restrictions, such as reducing the number of gear transmission is permitted) according to observers Honda MotoGP is very profitable. Honda uses a five-cylinder engine, and only need to reduce one cylinder to fix their machines to suit the new regulations, while other manufacturers have to redesign all of their machines. Restricted to 800cc also led to controversy that seems to present the motor used in the Superbike championship to be the fastest in the 1000cc motor racing circuits around the world.
Machines used in the 125cc class is limited as much as a single cylinder and with a minimum weight of 80 kilograms, while the 250cc class is limited to two cylinders with a minimum weight of 100 pounds.
Motors for the MotoGP class is allowed to use the machine with the number of cylinders between three to six cylinders, and there are variations in the weight restrictions depending on the number of cylinders used. This is due to an engine with more cylinders, power output is also greater, and weight limits are increased. In the year 2006 engines used in MotoGP is a four-and five-cylinder engines. Honda uses a five-cylinder, while the Yamaha, Ducati, Kawasaki, and Suzuki used four cylinder.
Motors are used in motor Grandprix made not only for racing only, but also as a venue for power struggles among manufacturers and technological advances. As a result all the MotoGP machines made by using a very expensive material and as light as titanium, and carbon-fiber-reinforced plastic. Motors are also using technology that is not available for public consumption, for example, is a sophisticated electronic devices including telemetry, engine management systems, traction control, carbon disc brakes, and modern engine technology adopted from the F1 car engine technology.
If the motors used in the MotoGP class only raced at world championship level, motors used in the 125cc and 250cc classes are relatively more affordable. The price of a more or less the same 125cc motorcycle with a car. These motors are often used in a national motor racing championships around the world.
One of several key challenges faced by drivers and engineers MotoGP MotoGP bike is how to channel the incredible power of the engine - more than 240 dk (179 kW), through the contact points of two tires and the asphalt surface with a circuit width is only about the human arm. As a comparison, F1 cars generate more than 950 dk (700 kW) but with four tires, so have the point of contact with the asphalt surface ten times wider than the MotoGP bike.
Machine specifications
* Configuration: 4-cylinder v (Grade GP), 2-cylinder (class 250 cc and 125 cc).
* Capacity: 800 cc (Grade GP), 600 cc (Moto class 2), 125 cc (125 cc class).
* Valves: 16-valve (GP), 8-valve (250 cc, 125 cc).
* Working valve: DOHC, four-valves per cylinder (GP), two-valves per cylinder (250 cc, 125 cc).
* Fuel: Without lead (no fuel control), 100 octane.
* Fuel Supply: Injection of fuel.
* Aspiration: Aspiration of normal.
* Strength: Kira - 250 or 225 dk.
* Lubrication: Wet.
* Maximum / minimum engine speed: 17500-18000 rotations per minute.
* Cooling: Single water pump.
