engine power

Discussion in 'Harley Driver's Club' started by chocobuddy, Aug 25, 2015.

  1. chocobuddy

    chocobuddy New Member

    had a local mechanic tell me that the 250cc engines power is requlated by the size of the exhaust outlet. What would happen if I increased that outlet pipe from the 1/2 in it is too say a 1" outlet?
  2. HotRodCarts

    HotRodCarts Cartaholic

    Unless you plan on redoing the entire exhaust with a expansion chamber I'd leave the exhaust alone. The 2 strokers need the back pressure.

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