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Video Tutorial: Jetting 101 for beginners


KDXRon

Jetting 101. Jetting can be tricky to get down and understand 100%. Here is a video I have used in the past, he does a great job of showing how all the circuits overlap, etc. please feel free to add your thoughts and experience. This will help newer riders understand jetting a little better.



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    • By Wayward Son
      It seems like the most common jetting issue that comes up are pilot circuit related.  The following is a sure method to choose the needed changes.
      With the bike warm and idling, turn the fuel screw in till the idle drops/misses.then go back out till the idle peaks/smooths. This should happen between 1 and 2.5 turns on a fcr carb and 1 and 3 turns on a CV.
      If you end up at less than 1 turn, you need a bigger pilot jet. More than 2.5 (or 3 turns on a CV), you need a smaller pilot jet.
      Choose the appropriate size and retest.
    • By Wayward Son
      It seems like the most common jetting issue that comes up are pilot circuit related.  The following is a sure method to choose the needed changes.
      With the bike warm and idling, turn the fuel screw in till the idle drops/misses.then go back out till the idle peaks/smooths. This should happen between 1 and 2.5 turns on a fcr carb and 1 and 3 turns on a CV.
      If you end up at less than 1 turn, you need a bigger pilot jet. More than 2.5 (or 3 turns on a CV), you need a smaller pilot jet.
      Choose the appropriate size and retest.
      This post has been promoted to a wiki
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