Caburetor always overflour and negetif terminal hot like elektrical shooting somewhere when enjine running..

Caburetor:
1.servicing caburetor,lool at feul jet.
2.there is a gap beetwen feul et and it stoper then jack up the stoper of feul jet.do it within cerefully.
3.testing by using a few feul in the bottle and plug in with hose pipe to caburetor.(doing this without assemble caburetor cap)
4.make sure when the flooter going up the feul jet will stop the feul.
5.make sure the flooter do not damage or hole(need replacement)
6.make sure when the flooter going down, a feul will going in that caburetor
7.than all clear.assemble it again and ready to put back at there place.

Negetif Terminal Hot when Enjine Runing.
1.I found 1 positive output wiyer from dynamo(megneto coil) touching at the cankcase enjine.
Solution
-just taped the wiyer with electrical tape.
2.Main suis also have a prob that positive and negetive soldering to near each other.when the age of this part become old there is karbon@oksida beetwen that soldering port make electrical contack and burn the wiyer.
Solution
-clean up that part.soldering back.make sure soldering sputter are not can touching beetwen positive and negetive.

Sounds like your carb floats are sticking,remove carbs and clean them, also have your charging system checked it might be over charging and getting the battery too hot..