This is a dirty engine when running, Smoke is only one indicator.
What Oil and fuel mix?
What Prop are u running?
Is this fully stock engine configuration?
Do you know if you have the updated piston?
I doubt that you hurt the motor You might have some dirt in the carb.
I haven't checked but you should be able to get it so rich it quits.
I wouldn't mess with the idle mixture until you have 4-5 tankfuls through the engine.
Sparky