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Crf 50Can anyone tell me the OD of their big bore exhaust and then a regular exhaust? I'm trying to figure out which powercore4 I have and don't know what size a big bore vs. regular is.
And if anyone has had both on their bike with the same motor set up, which one is louder? Big or regular?
big bore vs. regular exhaust
This is a discussion on big bore vs. regular exhaust within the CRF50 forums, part of the General Talk category; Can anyone tell me the OD of their big bore exhaust and then a regular exhaust? I'm trying to figure out which powercore4 I have ...
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Thread: big bore vs. regular exhaust
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05-19-2009, 10:23 AM #1Senior Member
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big bore vs. regular exhaust
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05-19-2009 10:23 AM
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05-19-2009, 10:59 AM #2Senior Member
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Re: big bore vs. regular exhaust
deos the header chang in any size, cause i got a stock bore an its the same diamter from the header to the can......if its a big bore it will get bigger from header to can
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05-19-2009, 11:18 AM #3Senior Member
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Re: big bore vs. regular exhaust
very nice. thanks. not a big bore on my bike.
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05-19-2009, 12:51 PM #4Senior Member
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Re: big bore vs. regular exhaust
The best way to find out is the six digit number imprinted on the midpipe. Go to FMF's website and see what number you have.
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