be extremely careful cause my Demon would never tune right, we decided to take it apart to check the jet sizes and three of them were the correct sizes but one was a 90 or something rediculous like that. This was on my Speed Demon 650. we swapped the jet back to the correct size and away it went and I have not looked back. Once ya get them right they are awesome. However getting them there is a major PITA.
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