Put a used motor in my 12 848. Changed the cam belts 1st & ran it at a track day. The motor ran perfect. The shift arm spring broke but that’s another subject. Though the engine runs fine& has no noticeable lack of power or any other issues, it makes this strange sound. It’s like a chirping, bell ringing sound on the belt side. I did not use any special tools to set the belt tension. I only used the original motor as reference. I’ve seen similar videos posted but there was no resolution. Has anyone seen this before?