Re: high performance carny running lean
A well tuned 2 stroke will burble and miss when simply cruising along merrily down the road under barely any load.
4 stroking when too rich will occur when under a straining load, even at WOT.
Stumbling is what would happen when the carb is starving for fuel from the fuel tank and the engine coughs, spits and jerks as it fires whenever the carb gives a little precious fuel. Reducing throttle position and slowing the RPM's of the engine can show improvement, but is not the correct remedy.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."