Please help anyone. Quick background on the bike. Got the bike about a month ago previous owner floated a valve he replaced the piston and had the head work done by a shop all new Kimble springs and valves. He put it all back together and could not get it to start so left it. I purchased it and took it home took the top end apart and replaced a spun ex cam re shimmed all the valves. Bike ran perfect until the other day I started it and took it up the road where it sputtered and felt like it ran out of gas when I looked I was almost out so I pushed it back home and didn't try to start it. Took it to the track yesterday and filled it with fuel and kicked the living hell outta it and nothing took it home and pulled the plug to find it was black and soaked so I replaced that and got a little sputter with the new plug but that was it. Things I have done tonight Checked timing its good Checked intake valve clearance its good .005 fits .006 wont cleaned carb fuel screw is 2 1/2 out and have a 42 pilot in there. Any ideas?