engine surge CB 750

Posted by Gene on Jan 18, 2012; 2:49pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/engine-surge-CB-750-tp3669445.html

My 1973 CB 750 has a very fast, rapid surge, up and down,  at speeds under 3000 rpm. Otherwise it starts fine and runs fine.  Is this a function of timing or carb synchronization?

Gene