You won't find many 125cc riders in the states to compare your bike to.
In any case, comparison is a waste of time, as riding conditions and rider style vary too much to be of any value.
After properly jetting your bike, what you can expect to get range-wise is......what you get.
If your SA is oem and it's the welded construction of the 200/220s in the states, there isn't any disassy/cleaning to be done.
If yours is aftermarket...take it apart, repack it, use a wire brush and/or decarbonizing cleaner to remove the gunk from the insert and arrester screen.