promotion image of download ymail app
Promoted

Why do they push start the riders in motorcycle racing?

I'm talking about sportbike racing (Moto GP, Isle of Man).

They take off at the beginning of the race on their own but when they leave the pits they are pushed? I don't get it?

5 Answers

Relevance
  • 7 years ago
    Favorite Answer

    When they start the race their engines are running.

    When leaving the pits the engines need to be started. Not many are pushed these days, most use a slave motor to start them.

    • Commenter avatarLogin to reply the answers
  • 7 years ago

    The motors are much more highly tuned than their 'road bike' versions so the battery and starter motor would need to be proportionately larger. That means an increase in weight just to start the motor. It is weight that isn't needed if the motor is already running, and a race bike needs to be as light as possible to give the best handling, power to weight ratio and the lightest bike for the best braking efficiency.

    Do away with the need to 'self start' a bike and the battery size can be reduced from a standard size to something like a small battery pak to just give enough power for ignition. Some regulations still require a starter motor be fitted but if it isn't used then there are some guys who remove all the 'guts' of the starter motor and just leave the starter case to comply with the regs.. It is called 'bending the rules'. Starting the bike is not a part of a race, the motor is already running.

    It is all about reducing the weight of the bike. Hope that explains it for you.

    • Commenter avatarLogin to reply the answers
  • 7 years ago

    The starting rules at the Isle of Man may be traditional, since this is a special event.

    • Commenter avatarLogin to reply the answers
  • 7 years ago

    the less the mass, the faster you go for a constant power. battery and starter are not worth the weight they add, considering you have to start the bike only once (in a crash free race).

    • Commenter avatarLogin to reply the answers
  • How do you think about the answers? You can sign in to vote the answer.
  • 7 years ago

    Batteries and starters are heavy and are only be dead weight once the race started.

    • Commenter avatarLogin to reply the answers
Still have questions? Get your answers by asking now.