Air Vents Pouring Water!
I had the same problem. I had to remove my airbox and heater box (which was coming out anyway so you can skip pulling the heat box but its easier) and pulled and vacuumed all the crap out of the cowl then used air and blew everything in the center to the ends and repeated. The drain holes was easier for me to clear because my fenders where off. But that's how I did it I have some pictures and a video I will find them and post it uo here