Charging system

Posted by Esawers on Apr 09, 2017; 11:43pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Charging-system-tp4062179.html

Hey there guys just joined the forum! Glad to be here! I have a few questions on my 1979 Honda cb750k.... so at idle the bike will lose battery voltage but very slowly yet when I hit the throttle I see a spike in voltage. Problem is it doesn't go anywhere near the spec 14v. It will rise to about 12.3 and this is with a freshly charged new batterty. My thoughts are rotor? I've checked the stator and brushes but not my r/r. Could r/r cause this problem or more rotor related? Any help appreciated! Thanks!