i just installed a 11-1 piston and a stage 1 hotcam. set the valve lash to .20mm on intake and.25mm on the exhaust per the hot cam instructions. and now my valves make a lot of noise so i also set them back to factory specs .12mm on intake and .17 on exhaust. i still have the same valve train noise. is loud valve train noise just a normal characteristics of the stage one hotcam