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jetting

  1. What do You think ?

    Maintenance / Important Information
    Hello everyone I will try and make it as short as possible!! I have a honda trx 400 ex 2005 for a year now and it runs perfect , every gear runs smoothly from closed to full throttle , no sputtering , boging or anything and she is stock , I did nothing to her except take the original exhaust...
  2. Trx400ex issue

    Maintenance / Important Information
    i bought a 2008 trx400ex a week ago it has a new 440cc big bore that the guy installed, i still have the stock bore which is in good condition and pistons. The upgrades i have are the big bore an hmf slip on and that all that i know of airbox is still on i dont know if the quad has been jetted i...
  3. Does my 400ex carb need jetted, or adjusted?

    Engine/EFI/Drivetrain
    Hi, I have a 100% stock 2002 400ex, I still have the stock exaust and no plan or money to get an aftermarket slip on. The other day I took the tip of the muffler, and I really liked the way it sounded, it was a lot deeper then stock, and sounded great under a load. My question is, i rode it...
  4. Jet kit 400ex

    Dyno/Tuning Room
    I have a 2000 400ex that I just bought. I am going to be putting a Lexx slip on exhaust on and an Uni Air filter. Any suggestions on jet size or a kit I could buy to have a little bit of a range of sizes
  5. 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?????
  6. 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:
  7. 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...
  8. 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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