Your carb has a hung float or needle and seat issues.
You have to take the carb off the bike and consider replacing the float and/or needle and seat.
You might get by just raising the float level. But this is only a stopgap maneuver. Buy a new float!
You bike is flooding so it wont run right until this is fixed.
The reason its only flooding while its running is because your bike has an automatic gas tank valve that opens when the bike starts and makes vacuum that opens the valve. It is saving you from the bike totally filling up with fuel!
Answers & Comments
Your carb has a hung float or needle and seat issues.
You have to take the carb off the bike and consider replacing the float and/or needle and seat.
You might get by just raising the float level. But this is only a stopgap maneuver. Buy a new float!
You bike is flooding so it wont run right until this is fixed.
The reason its only flooding while its running is because your bike has an automatic gas tank valve that opens when the bike starts and makes vacuum that opens the valve. It is saving you from the bike totally filling up with fuel!