The idle screw is on the left hand side of the carb very hard to get to.
you need a long flat bladed screwdriver and have to do it from the left of the bike.
The air screw is at the front of the carb on the bottom.
this is also hard to get to but can be done using a very small stumpy screwdriver.
It probably means for running the bike in when it is brand new.
James