Just replaced rings and piston pin on my 2000 450ES because of rather loud noise coming from cylinder and some smoke. Rings were obviously worn along with pin. Cylinder wall and rod were both okay. Did not bore... went back stock. Still has same high pitch, loud tapping coming from head. Valves were adjusted out to .006" at TCD and were in rather decent shape. Springs, rods, rockers all seemed fine. I did run a little seafoam in the last oil change. Can this affect the lubrication of the top end? Oil temp light was working last time I rode. May be running "hot" with little or no lubrication of the top end. Scared to run it like this!! How would I know if its getting oil??? What else could be making the loud noise??? HELP!!