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So just a quick update. I had a hard time being able to do anything over the last week because of weather and family commitments. Finally had a bit of time and did a few things and started with the carb. I cleaned it out as best I could and I also swapped out the spark plug. I was running an E3...

Bob, Yes, the float is about level, I took the carb all apart last night and cleaned it and put it back together. I talked to a gentleman at the local go kart shop and he thinks its a timing issue, but I don't believe it is, it will start if I give it gas and pull the cord.

No sir, that was not me. Most videos of “built” mud motors have just a stage one type kit on them. The guys that run V-twins build em up pretty regularly. Tonight I tore the carb down and cleaned it as thoroughly as I could. When I did the build I put in an e3 plug as thats all I could find. So...

That's what i'll do, i'm gonna pull the carb and spray everything down with some carb cleaner and blow it all out. Hopefully that solves the issue. If not, i'll let it idle like you said and pull the plug. Maybe i'll do the same at higher RPM's to see what my top end is like. I may have to...

KartFab, Good to hear you have a similar set-up. What kind of kit are you running? My first thought was replacing the idle jet but I haven't been able to find a place locally to source it. I'll have to order one from NR is I need a larger one, did you leave your idle jet stock?

Hello everyone, new to the forum and i'm looking for advice. I know you guys specialize in go-karts, but I figured this was my best bet at solving an issue i'm having with a recent build that I took on. So I'm running a GX390 on a mud motor frame. It has been a very reliable motor in its stock...