Steve
GS Whisperer
Yes, having the petcock on PRIME for more than a minute or so can definitely lead to gas all over the floor. 
You should always leave the petcock in the ON or RES position, as they are the positions that are turned on by engine vacuum.
Before you run your engine, please check the oil for gas. If there was enough gas to flood the carbs into the airbox, it might have gone the other way through the carbs and dripped into the engine.
Overall, there will be three hoses and two wires attached to the gas tank. There are two hoses on the petcock: the larger one is FUEL, it goes to the T in the middle of the carbs, the smaller one is VACUUM, it goes to a port on the output of carb #3. The third hose is a "safety" hose that connects to the guard that is over the fuel sending unit. It is meant to carry any gas away from the top of the engine, so it gets routed over the engine, then down toward the ground, usually around the swingarm pivot.
The two wires are for the gas gauge, they will have connections at the back of the tank, right near the battery.
.
You should always leave the petcock in the ON or RES position, as they are the positions that are turned on by engine vacuum.
Before you run your engine, please check the oil for gas. If there was enough gas to flood the carbs into the airbox, it might have gone the other way through the carbs and dripped into the engine.
Overall, there will be three hoses and two wires attached to the gas tank. There are two hoses on the petcock: the larger one is FUEL, it goes to the T in the middle of the carbs, the smaller one is VACUUM, it goes to a port on the output of carb #3. The third hose is a "safety" hose that connects to the guard that is over the fuel sending unit. It is meant to carry any gas away from the top of the engine, so it gets routed over the engine, then down toward the ground, usually around the swingarm pivot.
The two wires are for the gas gauge, they will have connections at the back of the tank, right near the battery.
.
