Hello. I just recently bought a 2004 Cannondale r800. I love riding it, but a realy annoying problem has developed. After about 5 or 10 minutes of riding, a realy annoying squeak can be heard only while pedaling. Its almost a chirping sound. Its not very loud. When I first heard it, I initially thought it was a chirping bird off in the distance, if that gives you any idea of the sound and volume. Its definetly somthing in the driveliene. As I pedal faster, it becomes higher in frequency, and as i pedal slower, it slows down. When I'm not pedaling, its gone. Its not my pedals as they spin, I have ruled that out. I oiled the bearings in the rear derailer to no avail, and the same with the bottom bracket(although I beleive its sealed, correct?). The noise realy sounds as if its comming from the crank/bottom bracket area. Anyone care to point out some things I can check?