Larry, you keep making threads about the same issue, without ever getting into what you have done.
You installed a cylinder kit: which one? did you use all the gaskets? if you replaced the head, did you lap the decomp properly? If you didn't replace the head, did you make sure the overbore isn't leaking past the head surface of the stock head?
You installed a carb: which one? what jet did you install (no, they do not come tuned for your bike, you have to do that for yourself via trial and error)? What filter did you buy that doesn't fit:
Done a leak down test?
Made sure your timing is correct?
Made sure you have fuel flow?
Made sure you have good spark at the plug?
There are a literally a hundred questions I could have asked, but you have really been offering no info on your setup and history of the work done.
Lastly, stop worrying about the spring-loaded float needle. It doesn't matter, and you didn't need one in the first place.