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post #1 of (permalink) Old 03-30-2002, 10:45 PM
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i have a DRZ-400 E. i just put a brand new FMF setup on it. when i have it full throttle it pops and it lost power instead of gaining power. thanks for any suggestions.
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post #2 of (permalink) Old 03-31-2002, 10:01 AM
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Re: popping

did you rejet after doing it? sounds like the jetting needs some attention
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post #3 of (permalink) Old 03-31-2002, 01:13 PM
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Re: popping

What jetting changes did FMF say you NEEDED to do?? or you have an exhaust leak.......
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post #4 of (permalink) Old 04-01-2002, 06:24 AM
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Re: popping

does it pop or backfire? if it is back firing then the bolts are prob loose at the header
post #5 of (permalink) Old 04-01-2002, 08:38 AM
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Re: popping

Sounds lean. Go up a size or 2 on the main jet.
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