The Yamaha service manual says to use molybdenum disulfide based oil on multiple areas of the head. It's supposed to be applied to valve shims, valve stem ends, valve stem sides, and under the camshaft caps. I haven't been able to find moly "oil" in auto parts stores. Moly (3%) is used in some greases, but I don't know how much molybdenum disulfide has to present for it to be considered the correct lubricant for the job. Since moly adheres to the metal surfaces, I'm pretty sure moly based lubricant is important on new shims and on new camshafts. Does anyone know where to find molybdenum disulfide oil or grease? Thanks!