Sprocket cover has no insulation, that was the comment from her that I was curious about, and I had hoped to clarify it and prevented unnecessary expense.Came in the mail along with new chain and sprockets. Took a look for myself and it's not actually missing at all. Further look into sprocket covers and it doesn't appear they come with insulation in the cover. Not even sure what she was talking about at this point. Waiting on a socket and I'll find out if the noise is from any of that.