This problem just started about 4-5 days ago. When I start the bike after it sits overnight or for a few hours it makes a nasty sound, plus it takes a second or two longer to catch. It's difficult to describe as I don't have an extensive mechanical background. The sound is kind of like a cough or a metallic sound that seems like it is coming from the front lower area of the bike. It does not do this after the engine has been warmed. The bike has 4k miles on it, 800 or so miles on the oil (at the mid-line in the window). I have used nothing but 93 octane fuel except for two weeks ago I put 87, then went back to 93 on the last tank (about a week ago). I run the tank pretty low before filling it usually, so I would think if it was bad fuel it would have burned off from the 87 tank sufficiently. I always let the fuel pump prime before starting. Sometimes the bike is in neutral and sometimes I have it in 1st with the clutch pulled in. Does anyone have any idea what this could be? And, I did try replacing the battery with a new one to no avail. Thanks for any leads you can give me!