A couple of weeks ago when going up an exit ramp I got a chirp when I geared down and let the clutch out, didn't happen when I just backed off the throttle. It only happened that day, until yesterday, when I got home and as I turned off the bike it chirped. Most of my riding has been in cold 40- 50F and wet going back and forth to work 60 mile round trip. 40* today but not raining... yet anyway, I'll see if it does it again. The front exhaust nut and stud are pretty rusty, looks like it's never been off, I'm thinking an exhaust leak....any other ideas?? Thanks.