Enjoying My Hi-Flow Muffler Insert!

Discussion in 'Whizzer Motorized Bicycles' started by Hal the Elder, Dec 9, 2008.

  1. Hal the Elder

    Hal the Elder Member

    Hey MotorBike Mike:

    I used my Dremel to cut and grind down the short portion of the perforated tube protruding from the front baffle of the muffler, making it flush with the baffle, then I installed it last night.

    This morning when I fired Oscar up, I was pleased with the sound! It wasn't much louder than stock, but produced a deeper, more satisfying tone.

    I could feel a slight increase in power right away, but I didn't try for any top speed comparison, because I really don't feel safe taking him over 30MPH.

    The difference in diameter between the stock exhaust port of roughly 0.625" and the Hi-Flow of about 0.920" gives an increase in flow area of a little more than 2 to 1, which eases the exhaust restriction considerably!

    Now Oscar can inhale AND exhale much better!

    Soon I'll be ready for the Cam gear advance!

    Last edited: Dec 9, 2008

  2. jbcruisin

    jbcruisin Member

    Hi Hal,
    I bought one of the high flow inserts at the East Coast Rally form Quenton & installed it at the Rally right away. I like how it sounds too. Advance that cam. You'll like the result.
  3. RdKryton

    RdKryton Active Member

    I knew you would like the sound. It is worth it just for that. The performance gain is a nice side effect.

  4. KilroyCD

    KilroyCD Active Member

    The exhaust note with the Hi-Flow is music to my ears as well. :grin5: