You shouldn't need a whole new barrel unless something went right through it. Worse case scenario you can have it re-sleeved for around $200 I think. With that, a top end kit for that bike should be about $120 ish depending on who you go with. That will come with new piston, rings, wrist pin, and all the gaskets. To do a quick check of the bottom end condition, try to wiggle the fly wheel. Any movement = blown bottom end bearings.
