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    Hac valve removal on a 1997 summit 670

    I have been reading the posts on removing the hac valve and jetting for altitude. I tried to adjust the hac valve as suggested on one of the posts. Measuring from the end of the tube at the end of the hac to the actuating pin. 3 to 7 mm. Mine was 9mm. Set it to 4.5 and the machine still didn't...
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