does the thing seem flooded when it is hard to start? PWK's have a machined needle bore in the aluminum block of the carburetor, when this area wears out it can cause unwanted fuel to be pulled in to the intake and cause a rich condition. The carb has to be relaced if this has happened, there is no brass insert in this area. It sounds like you are jetted very lean to me, compared to what my bike is jetted. I only have a head, reeds and pipe with my 2 into 1 intake. I run like a 48 pilot, 178 main, and the needle is around the middle clip position. I dont have any port work done. Remember once warm, either use no throttle when kicking over, or if flooded hold it wide open while kicking. Dont play around and flutter the throttle while starting it. Only other thing that comes to mind is check your reeds for proper seating to the cages, and check the intake for leaks. Get it started and spray the intake down with brake cleaner or some other flammable aerosol spray. If there is a leak the idle will change.