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Reduce of Miles per tank after pipe holes

3589 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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Three weeks ago when I first got my bike, I noticed I was only getting about 33 mpg - I ride through traffic mostly - back and forth to work and there are a lot of stoplights.

After drilling my exhaust (4 holes each 1/2"), my mileage improved slightly and now I get around 38 mpg.

So mine improved (but I also just finished my break in during this time, now @ 1100 miles).

But I don't understand why some people are getting 40+ mpg - is it mostly highway riding for you guys?

I ride mostly city except for the weekends, but even then it takes me 30 minutes to get away from traffic.
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