125-200cc husky restricted slider?

i was looking at the husqvarna approved derestriction kit in the special parts on husky website my bikes is a 2012 sms 125 totally stock. its says i get a new richer jet, full power exhaust and slider.. does this mean my current slider doesnt open fully so its sort of restricted. i dont want to but the husqvarna kit i want a DEP which i have found out the jetting spec for its just i dont have a clue what slider i should use, and were to get them, somebody said to me that the slider can be de- restricted using a laithe.. any one know any thing about the sliders?

I believe the restricter in the carb is just a nylon piece that can be removed in minutes
As for the slide cant see that needs changing / modifying
Will also add I have no idea as to what carb and size of carb comes fitted to the sms, If its the same 38mm mikuni tmx as fitted to the WR/CR I have a few different slides for these or a complete carb I would sell at a good price

It is a 28mm dellorto