The Low RPM Rattle

Posted by Grussell on Jul 02, 2008; 4:08pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/The-Low-RPM-Rattle-tp458490.html

        I started out in February with a 1980 CB750 K bike in really bad condition.  Six months (and who knows how many hundreds of hours of work) later I've got a 1979 K engine in a 1980 frame.
        Here's the problem... at low RPMs (say 500-600) I can hear a rattling.  It sounds strongest on the right hand side of the engine (the side opposite the starter clutch assembly).  The rattling goes away as soon as you get the RPMs up just out of that range.
        Here's the question... Is this rattle normal for one of these older DOHC bikes, or is this a sign of certain doom for my rebuilt engine?
        Any and all help is of course much appreciated.