She's having to use the kick starter at a stop sign? Something's really wrong, but it could be from a whole bunch of places.
If the jug is really scored, hey you have a doorstop. You probably had little compression as well which may have accounted for it dying.
If you want to leave it stock, you could probably get a decent jug at a decent price since so many people kit. You'll need new piston, rings, needle bearing, etc.
Let's see if Jack Rutherford or DPC Ryan can give info on the Athena.