Re: SPLITTING THE CASE

Posted by RodneyCB750K1979 on Apr 02, 2013; 4:17am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/SPLITTING-THE-CASE-tp4037806p4038834.html

Yes. For sure the case has to come apart to change the chain sprocket shaft oil seal - aka primary shaft oil seal.  The oil seal has an external lip that fits in a groove in the case housing.  This is also a 2-piece oil seal. Any shock or driving of the seal in will cause the inner seal to separate.  Apparently this oil seal "enhancement" started with 1979 models.