Advice on adjusting the Dell' Orto SI24 24E Carburetor on a 1979 Vespa P200E

Advice on adjusting a Dell' Orto SI24 24E carburetor on a 1979 Vespa P200E.
Adjustment by master mechanic Giovanni D'Avola in Chicago Illinois.

[@daytonasunset]

Totally useless video! What did he adjust? Nothing... just played with the rpm.

[@Uthathlor]

He is adjusting the mixture of the air/gas coming in carburetor which is very important for 2 stroke engines. His approach to config this is strange but i would say it works. Clockwise you lean the mixture and the other way out richer. If you get too lean which is increasing the rpms its dangerous for the piston and it could be seized, that's why you must adjust it almost perfect. An easy way to check if the engine is running ok you check the spark plug if it has brown color its the best one, if its white its lean dangerous and if its black its not dangerous but it rich and burns more gas etc.