Buck--you say you had your carb bored by MHR and you got your jets from HPR.  I would guess your jetting to be correct from jerry.  Yes the Q pipe runs smaller jets than the HPR.  Even if your mains are off it should not make a difference on starting.   I would not trust that MHR cleaned the carb.  I would guess that at MHR (based on pictures I have seen of what he sent others) that the carb is full of crap.  Did you yourself clean the carb. By clean I mean every little air/fuel whole and passage shot with carb cleaner, blown out with compressed air, I have had to remove air screws and really clean/blow out that passage.  If you have spark/ground I would have to think its air/fuel.  I would guess by now you have done it but one plugged passage can cause this.