I have a 1982 gs650g that will not start. It has good spark (blue and rapid), carbs are rebuilt and cleaned, no shorts, it does not have an air box it is open carbs but I was told it can run like that so I was gonna just adjust it to run that way. This is my first bike so I’m not familiar with them. Is there anything I’m missing??? As far as I can think the bike needs three things. Gas, air, spark. I’m sure I’m wrong so that’s why I’m here I’m not sure where else to go. If anyone can throw me some advice I would really Appreciate it.