Okay I apologize for my past posts as they are clearly not going into enough detail :-[. So Ill start all over. I bought this bike back in 2013. That year I read the clymer manual about a dozen times, took the whole bike apart, striped the frame, repainted the frame, checked pressure in both cylinders, set the timing, valves, points, changed the oil etc. In 2014 I had bike running perfectly and rode it all last summer while I was living in ann arbor. I never tore down the engine as I didn't see the need to as the pressure in the cylinders was good and there were no leaks in the gaskets. Being 6' 2" the bike is clearly a little small on me and ive decided that i would give the bike to my girlfriend. This is why i went with a flat seat. So that she could feel more confident on the bike. In the picture it probably is not noticeable but that seat is upswept in the back so i shouldn't have a problem with the back tire.
Now that that is better explained on to better explaining the carb issue. I had the bike running and idling well this spring but when i came back home for the summer she started having the issue. Now I did leave the gas in the "ON" position by accident in the spring so i assume the carbs just got dirty and need cleaning.
Since I am de-tabbing the bike for the seat I will need to put the battery somewhere else, hence the putting the battery under the seat statement. Now I remember in my material science class we were able to combine voltage from batteries by running a series (negative to positive, positive to negative). So I was wondering if any one has done that and how their success has been.