Going on my own personal experience with aches after riding for the first few months, i grinned and beared it and then it got a lot better. On the AR to the amusement of others and to myself TBH i ran my right foot(achillies to be precise)over whilst riding along around a corner. I ache now after around 100 miles from that injury, all i do is stretch it, either whilst riding(not taking responsibility for injuries if anyone does this) or i'll stop and stretch. I'm so used to aches and pains I forget about them as i'm enjoying my riding atm. Dogbones and a lower seat are an option IIRC. But its not because you are too small you have aches. Stewie is quite small(he's in Scotland so shouldnt see that
) and so far he is doing fine on my bike AFAIK and before he was riding a 1990 ZZR600 and that looks bigger than the SV and he loved that bike too. So keep at it mate.
Stu