Honda TRX ATV Forum banner

jet

  1. 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
  2. 2002 400ex jet size

    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...
  3. 400ex re jetting help

    Tech Issues, Bug Reports & 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...
  4. Newbie with TRX400

    New Member Introductions
    Hi everyone! I just bought a Honda 1999 TRX400. The following mods were already made, so I'm trying to fix black smoke coming out at high rpms. I'm new into ATV repairs, so even though I've been reading so much, I still don't get it... It has a nice white brothers pipe, K&N filter, but it's...
Top