I just looked at a02 954rr with only 4,000 miles. The bike was in great shape. It was very cold in the guys shop. When he started it up it sounded fine about 10 seconds later I noticed a noise coming from the motor. If you slowly revved it up it didn't really get any louder. If you chopped the throttle up to around 2500 rpm you could here it almost like there was something loose. He said he never heard it before til today. Any ideas of what it is?