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05 CRF450 JD jetting question

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I have a stock 05 crf450 and just put in a JD jetting kit. my question is this: The kit says to use a the red needle in clip position 5 with a 172 main for 3k to 6k elevation. I ride around 5250. Does the 172 sound really rich? stock is a 168 for the 05.



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