Originally Posted by mapbike
It is funny how some get so bent out of shape over this topic....LOL
No one is trying to force anything on anyone best I can tell and I agree with apex, my first thoughts after rereading some posts were, was the carb on that Kart rejetted for the 50:1 mix which would make the engine run way leaner than it had been running on the 20:1
Actually it's just the opposite. If you switch from 20:1 to 50:1 without rejecting the engine would run richer.