I was about half way in to my commute yesterday morning. On a down hill I took my hand off the throttle for a second and when I got back on it it bogged down and lost power and shut off. It sounds like it wants to start just want kick over. I pulled the air filter off and noticed that the the large hose fitting on the back of the air box is melted. Not sure if it's related. Also not sure if the hose was disconnected before I pulled the air box forward. Here are some pictures. Any ideas? Bike has been running really well up until now.