Looking for any tips here:

83 Honda cb650sc that will NOT turn over, just chugs. The coils are both good, test read fine. Connections are clean, plugs will foul pretty quick. Carbs 1 & 4 are popping, trying to fire, I get get heat from them. Some poofs of air out of 2 & 3, no heat. Tried different plug wires too. Carbs themselves are clean.

Any suggestions on what I might have missed? I have a week left to get this running.