I have been having a hard time starting my bike. My jetting is stock and I'm at about 800 ft above sea level. I've replaced main jet, pilot jet. I've tried the whole, twist the throttle a few times then kick. What seems to work the best and easiest is to pull in the hot start lever. Usually the bike will kick right over. I notice very little difference whether the choke is on or off. What could be causing this? It would seem the hot start is leaning out the mixture? The fuel screw is 1-1/2 turns out.