@Idkw much 👍
Your fix is right here.
Post in thread 'continued affordable mods'
https://www.diygokarts.com/community/threads/continued-affordable-mods.47501/post-595112
Why did I say low and high speed jets too lean????
Think about this for a min or 2.
You are already too lean on the high side, your combustion chamber is already over heated at WOT.
Now you let off the go fast pedal, butterfly in carb closes, the piston speed is still high, now its trying to pull fuel thur the low speed jet, which is half the size of the main jet......well its too lean to begin with, so combustion temps go even higher.
Now you hit the go fast pedal again, butterfly in carb opens, pulls fuel from the main jet, which is twice as much as the low speed jet, but still too small to begin with.
That cool fuel/air hitting an already over heated combustion chamber is causing an uncontrollably burn, unsteady pressures, inside the combustion chamber and causing it to spit, sputter, stumble, til the temps come back down and every thing starts working together again.
Then you do it again.
the higher the rpm, the worse this situation gets.
Piston and rings can only take so much temperature from a bad tune, then they won't hold pressure above them anymore. You will have more pressure under the piston, then on top of it.
Gasoline is not just a flammable liquid.......it's also a coolant.
Make sense??????
i mentioned the zip tie before. But you say you need it. So I gave up.
Hope this helps, good luck
