Help?

[FLORIDAGZ250]

Ok lets see what we can figure out.

My bike has returned from a local shop and sounds GREAT! For the most part runs great, I had a whole lot of work done on the top end. New Rockers, Adjusters, Cam Chain, Cam Guide, and a Sprocket replaced, new gaskets, new sparks. and i payed waaaay to much money for what I got back in general.

Here is the problem.

Before I sent the bike in with all of those problems needing fixing, it shifted great and idled great. Now that it has returned, it starts up very easily with the flick of a button, but idles high till warm up then dies. The Carb brand new I bought it from the Local Suzuki Dealer. More money that I should have not spent. I have checked the petcock valve it is switched to RUN, I don't know if this is the correct position, the other Two are PRI, and RES. after the bike warms up it just stalls when shifted into 2 from 1st with the clutch fully engaged, but this could be dependent on problem 2 i am thinking

Problem 2.
when shifting the shifting lever will not go to <N> from 1st, as well as from <N> to first, with out some toying around or just plain using my hand. (that's just not safe riding) Upon further inspection I have also found a slow Oil leak when the bike warms up coming from the gear assembly (clutch?) covers, as well as the Exhaust Ports on the Front of the Engine, probably solved by just changing the gaskets, oil filter, and oil. I got the OEM filter and gaskets. As a note, there is about a 1/4 inch bit of gasket sticking out of the front side of the gear cover/clutch assembly. Assuming this is not normal.... should this gasket go on fairly easy, and does any one have suggestions of making this go smoother. (mounting the gasket) Any other things that you might think of causing this would be greatly helpful!

Thanks in advance!