I have a 03 Rincon 650 That has a noise just above idle that is not very consistent. It kind of comes and goes like something loose. It sounds like a metal tingy noise almost as if a heat sheild or baffle is look in the exhuast but that is not it. I tore it apart to check things out. The valves are properly adjusted and the chain and tensioner look good. Just wondering if anyone know a common problem or has expirienced this. I was told it could possibly be the auto compresion relase but not sure. any help would be great.