Bike runs till you turn off choke then stalls imidiatly enless heavy throttle

I am assuming that the engine has reached sufficient temperature to idle. A cold engine is not going to idle with the lean jetting they come from the factory with. If the engine will not idle after it warms up, you may have a problem with the slow speed jet being clogged up or a vacuum leak somewhere.

If the bike has been sitting for a long while, the carb is probably in need of cleaning. However, there may be trash in the carb as well that has stopped up the slow speed jet. The carburetor will have to be disassembled and cleaned to fix this problem. If you disassemble the carb, check to see what size the slow jet is. It should be a #45 on your bike. If so, try either a #48 or a #50 for better performance. You can also take the needle out of the slide and put a 0.020 inch (0.5mm) shim under the stop on top of the needle. This will RAISE the needle slightly making the midrange mixture just a little bit richer. A 3mm flat washer is just about right to do this with. Use only one. I think you'll be very pleased with the results. Also, drill and remove the anti-tamper plug that is over the idle mixture adjustment screw. This way you can adjust the idle mixture and get a smoother idle. Just be careful when you drill the plug and don't go too deep and damage the screw. Drill a small hole in the plug, turn a sheet metal screw into the hole, and pull the plug out.

There may also be a vacuum leak. There is a vacuum hose connected to the rear of the carb that supplies vacuum to the VOES switch and the fuel petcock. Check this hose for leaks or to see if it has come loose. I have also seen the vacuum operated petcock give a problem like this as well. Disconnect the vacuum hose from the back of the petcock, plug it with something, and start the bike. It won't run long because the carb will not get any fuel from the tank but it will run long enough for you to tell if this is the problem. If so, I'd recommend replacement of the petcock with an aftermarket manually operated version. Pingle makes a good fuel petcock. It could also be the intake manifold gaskets but this is rare in my experience. Good luck!!