Ok wait, did you use the old gasket at the reed cage? rather use a new one or use gasket maker (Heat resistant silicone).
If you have and its still not working then follow my next steps.
Lets start this all over.
- Take off the Carb
- Clean the airfilter again if you have done it still clean again, it wont hurt
- Strip and clean all jets and small holes including your air fuel mix screw and choke etc
- Take off the Fuelcock and clean it
- Take off the reed cage cleen everything and reinstall the reeds making sure they are FLUSH with the cage
- remove the spark plug and clean it or replace if possible/necessary
- clean the electrical joints at the coil etc and the ones comming from your stator
- when you are ready to put everything back together, turn the airfuel mix screw all the way in then start at 1.5 turns out (1 full revolution + 1/2 revolution)
- just before you try start the bike check if you getting a healthy spark!
- turn your idle screw all the way in and then turn it out bit for bit untill you get the bike to start
Let us know if this still doesnt work and guys if I missed something please add!