The boys 1988 CR80 has ran awesome till last month. Got the bike in November last year. The top and bottom end have both been rebuilt. The crank has no play at all. All of a sudden it won't hold a seal on the right side for nothing, not even the carbon fiber double lip Teflon seal. I have a vise grip dial indicator on it's way from Harbor Freight. Is there any chance this might be the factory crank and be worn out at the lip sealing area?