Most people only plug the carb drain when they ride deep. I leave both mine and the wifes bike plugged all the time. But if your jetting is off and running rich it will dump the excess gas in the airbox if the drain is plugged.
Robb I forgot about the hauling, I have filled mine before. So now I turn the fuel off and plug the snorkles when traveling.I take mine off when towing, didnt used to, but had the airbox fill with gas once so I dont want to take a chance anymore.
I've tried plugging my carburetor drain tube twice and each time the airbox has filled up with gas. I replaced my plug yesterday with a NGK Iridium and the one I pulled out was really black. It ran sluggish on top end when I took it down the road and back.Most people only plug the carb drain when they ride deep. I leave both mine and the wifes bike plugged all the time. But if your jetting is off and running rich it will dump the excess gas in the airbox if the drain is plugged.