some things to start with
1.realize that a bored over 125 will require frequent maintenance for things like gaskets, rings, and pistons. Expect to have to do the top end about every 20 hours of riding or so.
2.a 93 is pretty old, see if the machine has had top ends since the bore over, also see why the bike was bored over in the first place, ie was it seized or what? I ride a bored out kx and it is very fast and I haven't had problems with it, but it was professionally done...
3.check the shape of the wheels, any cracked rims, does it need tires, do the brakes work well?
some things to start with, a bored out 125 will always require more maintenance than a stock one, so be prepared. How much is 700 canadian?