The use of the vehicle for daily activities would have been different if used for racing. It takes its own engine specifications for the needs of the race.
Therefore, the motorcycle or automobile manufacturers provide a special machine for the race. Certain vehicle brands such as Yamaha, Suzuki, Honda, Kawasaki, Ducati, and others making machines specifically for motorcycle racing moto GP.
Motorcycle engines for the race course has a different capacity than regular motor engine. Each engine must last at least three races, cylinder engine with a maximum bore 81mm. Toughness machine must be tested first.
For the drivers can not be authorized to make modifications to the vehicle engine so that the vehicle can be used also for the race. Standard engine specification should be changed into the engine specifications for the race. For example, stroke and hi speed is increased.