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keel5

GYT-R STAINLESS STEEL HEADPIPE

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I just picked up a GYT-R STAINLESS STEEL HEADPIPE. Am I correct in thinking that I do not have to do any jetting? Also I know this pipe does not have the same bend as stock but will I have any problem matching it up to me FMF PowerCore 4?

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The FMF muffler is not a very popular unit anymore for the YZ/WRs. There is just more better stuff out there.

Since you have a full system and the stock jetting is not spot on, you will have to rejet. Best bet is to get the JDs Kit on the thumpertalk site here. Works great with the BK mod. - slightly different mod for the 98-99 carbs.

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