stock jetting would prob be close....what's your altitude in wi?
even w/ an a-m silencer, you don't really have to go up too much, esp if you're above, say, 1000ft.
i had the same issue w/ my engine, first i blew up the piston so i pulled the cases apart and found a hole on one of my halves!! so here she sits till my new case half comes in (hopefully today).
you're much more organized than me.