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jetting

  1. New to jetting, need help!

    Dyno/Tuning Room
    Hey guys I'm new to the forums and could use some help with jetting my 02 400ex. I live in PA altitude around 1000ft. I have a unit air filter with no air box lid and a full white bros exhaust. I have no idea what to make my main jet size so any suggestions?????
  2. 07 250ex carb removal?

    Maintenance / Important Information
    Need to remove carb for a 're-jetting and cleaning. Are there simpler ways to do this than to remove rear plastic and airbox? Trying to avoid more b/s than I have to! :eek:
  3. 2007 TRX450ER Still Doesnt Like to Idle

    Engine/EFI/Drivetrain
    Help!- The quad will not idle more than 10 seconds with choke off and also a pain to get going unless you leave choke on and pop-it once your get going. Wont even idle long with choke off after an hour ride. Notes: This quad has always had this problem since I bought it new two years ago...
  4. hotcam help? 400ex

    Engine/EFI/Drivetrain
    Installing stage1 hc check signiture for mods cc etc. Should my mj be sufficient or to small all input welcome thanks :confused:
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