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1-13 of 13 Results
  1. Dyno/Tuning Room
    I have a 2002 400ex bored to 416 with stage 2 hotcam, ECO Big Gun exhaust, stock carb, and stock intake. I was wondering if I should get bigger jets and open my intake some more. It runs good now, a little rich but I was looking for more power if I could. I don’t have much knowledge on intake...
  2. 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. Engine/EFI/Drivetrain
    I just bought a 2004 Honda 350es it wasn’t running or driving when I bought it I figured out the shifting issue and I bought a new battery for it and now it runs and fires right up idles great. My problem lies in the throttle it seems like it’s not revving up fast at all it’s sluggish. The quad...
  4. 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...
  5. 400ex enough adjustment in carb means no need for jetting?

    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...
  6. TRX General Discussions
    My 02 400ex has nothing aftermarket besides a big gun es exhaust just the slip on. I recently got my 400 back from the shop it sat for months there not started it wont start i cleaned the carb and set the jets to normal settings first if someone can get me all the jet specs like how many turns...
  7. Engine/EFI/Drivetrain
    so i bought this bike about a year ago from a friend and it wasnt running at all. but prior to me buying it the bike was running at one point . I took off the carb and it was rusted and had all kinds of stuff in there so i went to a honda dealership and bought a brand new carb. ever since i put...
  8. Site Help and Suggestions
    Got a used 2001 250 recon for work on the cheap. It runs, but not well. Ive been trying to fix it up but can't get it all the way there. At first it would only run when the choke was set just right. I got a carb rebuild kit and rebuilt the carb- first time for me. Cleaned everything, put in...
  9. Maintenance / Important Information
    I have a 2002 400ex that is running lean. I will let it idle for a min or two, do a lap around the yard, and it will be pretty hot. I checked the plug and it was white. Only modification I have is fmf slip on. Everything else is stock. I am around 800ft above sea level. What jet size would I...
  10. Site Help and Suggestions
    Hi I just rejetted my bike today with the dynojet kit. I have an 02 400ex with a 440 big bore kit, big gun full exhaust, and moose air filter with no lid. I used a size 42 pilot jet and 170 main jet which is the size that the kit recommended. I also changed the needle to the one that came with...
  11. Engine/EFI/Drivetrain
    Working on my moms 2005 trx250ex, it sat for a few years, got it going after a carb rebuild. It sat for two weeks and now it wont turn over. I swapped the fuel valve, replaced all jets to stock size and settings, took a bristle from a wire brush and pulled it through the carb, it has a brand new...
  12. 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...
  13. Engine/EFI/Drivetrain
    So I resently bought this 00 trx400ex w/ the 440 bigbore kit and I was having throttle cable problems. When trying to buy a new one I was having trouble because the carburator is an edlebrock. Id be happy except during the research I found out its not the carb for the 440 kit but the one for...
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