Drilling the muffler+Air Cover Mods
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04-09-2010, 04:56 AM
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Re: Drilling the muffler+Air Cover Mods
The limits/sizes are set by how much noise you want to add, and your ability to read the spark plug and adjust your carb accordingly.
Then you may gain a 1/10 hp or so.
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