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Reduce of Miles per tank after pipe holes

3586 Views 16 Replies 13 Participants Last post by  deuce269
I don't know if it's my imagination, but i think that after i opened 4 holes in each pipe to get better sound my bike start to expend more gas.
I'm doing aroung 28 - 30 miles per galon.

do this happend to anybody? maybe is the way it sound now that i'm riding more than before hahaha.
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I have the drilled exhaust on my bike. The highest I got on MPG is 47.85 the lowest MPG was 37.69
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