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05-22-2017, 02:58 PM
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#2 |
 Join Date: Dec 2014
Posts: 738
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To the BEST OF MY KNOWLEDGE the only way to increase power is to lower back pressure , thatmeans MORE noise! That's on racing motorcycles. I assume that it works the same but I'm no expert on scooters.
  Irish  P.S. I used to run straight pipes (with engine tuned to them) at the drag strip but there's NO noise police there! Last edited by Irish; 05-22-2017 at 03:02 PM. Reason: Add PS. |
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07-28-2017, 09:43 PM
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#3 |
 Join Date: Feb 2015
Posts: 121
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With a big bore kit, you need something that can flow the exhaust without excessive restriction AND has enough surface area to absorb the sound waves (change them into heat). You just need to do your research before purchasing the muffler. In order to effectively quiet up a higher flow rate, you basically need a bigger muffler section. If the performance muffler has a muffling section of similar volume to the stock muffler, its likely to be louder than the stock pipe.
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