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You can try:

Are you sure the choke plunger is going right in ? I'd double check the idle speed screw and the initial setting of the idle mixture screw for that bike, and then try adjusting it to best slow idle, which would be a bit slower than we'd mostly have it idling at. They need adjusting right down to a slow idle and the best mixture setting, then sped up with the speed screw to a good idle speed. It can happen that people get into a circle of adjusting the mixture too lean or too rich and then speeding it up to compensate.. That circle can end up with things being adjusted right to the end of their range, and then the spring holding the screw from vibrating out, becoming loose, and the screw dropping out.. If it didn't come right then I'd pull the idle mixture screw out and make sure it's O ring and spring and washer was on right, and that the taper was in good condition and looked the same as the original(check the shape carefully !),, then pull the slide and check/inspect the discharge tube down in the venturi was poking up a little, and I'd check the slide needle was secured in the slide properly. If all that looked right I think I'd take the carb off and check the float height and jets hadn't been muddled, though it's generally pretty difficult to get them muddled. When the carb is set up right the idle mixture screw should be about two turns out as a starting point, and then you adjust it when it's warmed up. It shouldn't go right in to a stop without leaning the mixture so much the engine dies, and you shouldn't wind it out till the retaining spring has stopped holding the screw, and at that stage it should be too rich.

Just now seeing your post. Thanks its always a great day, getting together with kids and grandkids.

@Ajmboy, Thanks for the reply. It says I will have to have 10 Posts before I can download it though.