Gearbox knocking

Posted by Stevie63 on Jan 08, 2011; 9:55pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Gearbox-knocking-tp2218711.html

I have just taken on a '79 CB750 DOHC and eventhough the motor is running there is a knocking noise coming from the gearbox. Having drained the sump down, run Engineflush through,cleaned the hyvochain hydraulic adjuster there is still the knocking at idle revs. Has anyone else come across this problem?