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carb problems
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  1. Engine/EFI/Drivetrain
    So I have a 2002 400ex bored 40 over and a stage two cam. I can’t get it to fire. I’m thinking I need bigger Jets. If I just buy a 450 carb would that be the best option or should I just go up in jet size
  2. Engine/EFI/Drivetrain
    Hello all, I’m new to the forum and am in need of some help. I currently have a 2007 Honda 400ex that I bought from an individual around 6 years ago. After buying and having issues I realized that my bike is far from stock lol. What I do know is it has stage 2 hot cams, FMF power core 4 full...
  3. Engine/EFI/Drivetrain
    First-time poster here, so sorry in advance if this post is in the wrong place! So my 300ex was running fine a few weeks ago, and I was warming it up when all of the sudden it started sounding really bad (similar to bogging noise). I investigated the intake system and found nothing. The next...
  4. Engine/EFI/Drivetrain
    I need opinions on my tuning: I've got a 2000 400ex, original motor, wrapped header, oil change. Rebuilt the carb and adjusted valves. After a lot of trouble with backfiring through the carb (signifying really lean) I'm running a 42 pilot jet and a 150 main jet. This helped a lot, but I'm still...
  5. Engine/EFI/Drivetrain
    Ok so here is the problem the quad will idle in nutral and will rev up In nutral no problem but as soon as u put it in gear and try to actually ride it, it cuts out / Boggs out and shuts down, it sounds like a pop corn machine lol . I changed the whole top end gaskets cleaned the entire carb...
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