Motorcycle Repair: 2004 PW80, new spark, petcock

Question
My pw80 will not kick over.  This has happened over a 3-4 ride period. It started off by running a littel rough then starting hard until now.  I have cleaned the carb. The gas comes out the over flow when I choke it or give it any gas.  I did take off the head a clean the carbon off the top of the piston and it did start and run.  The next day nothing.  I have put in a new spark plug so I noticed that it seems like it may not be getting gas.  Is there something that could be blocked that I could look for?  Please help

Answer
Take out the plug and pour a little gas directly in the cylinder - try kicking it over - if it starts, then you will need to trace all fuel lines, including your gas petcock on the tank, through the carb, disassemble and clean carb, etc..  blow all lines clean, clean all jets in the carb, etc..

Good Luck.