when you check the plug you have to check the plug after insisting a certain time in a restricted rpm.
When you check the plug like that with no plug chop tech. and to a certain rpm your plug will tell you that in the range that you generally drive the carb set is ok but you can’t be sur at max rpm.
First you have to get the max jet right for max rpm and then the other jets. (for me is the easiest way)
If you don’t do that you will use a smaller main jet which influence you feel in the mid, mid high, so you will have this range right but at max rpm you will be lean.
Scorpion exhaust shift the power curve considerebly towards high rev so it will need a fairly big main jet, but it is also true that it get this high rpm power at the cost of a certain mid, mid-high rpm power.
So, probably ( since I have never used Scorpion malossi with 24S[I)] you will need to slight lean the mid range and put a bigger main.
But to be sure where you are lean or rich if you can’t tell by drive feeling, you should do the plug chop tech.
You keep the engine rev at a certain rpm afor a certain time this time has to be longer as the rpm rpm are low.
This will tell you where you are.