Update on what i tried with no sucess. thanks for all the advice
1) Took off the washer under the main jet
2) carb cleaner checked leaks: cylinder to case, cylinder to head, cylinder to manifold, manifold to carb, exhaust to cylinder...no leaks
3) half covered carb with hand while throttling...start to die out
Im at the end of the line..will try to jet down up to 72..then i quit..i'll have to do a complete tear down and retry..please help!!!