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Why on the stock exhaust is the right muffler straight through and the left muffler blocked about 10 inches from the end cap? On my new to me 2011, 103 cop model the left muffler is very black in color and the right is showing no discoloration at all. Loving the scooter, have 600 miles in two weeks.
 

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Most of the exhaust is directed through the right pipe, so they have different baffles. The first thing most people do is add a nice set of slip-on mufflers. This opens things up and reduces weight.
 
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