Re: very fast rhythmic surging of motor

Posted by boyorastroboy on May 29, 2010; 5:23am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/very-fast-rhythmic-surging-of-motor-tp848559p853891.html

Thanks for the suggestions, guys.  It seems to not surge at idle at all.  I notice it only when the rpms are somewhat high (have a busted tach).  I decided to dig into the timing and have found that the 1-4 cylinder was dead on, but the 2-3 were firing several degrees early.  This surprised me because I've had a Dyna ignition in the bike which has worked flawlessly for 5+ years.  What further surprised me is that I can't seem to configure the Dyna in a way that I have enough "play" to adjust the 2-3 back into time.  I called Dyna and they said that was highly unusual, but possible.  They gave me some advice on how I could re-adjust the plate by measuring off the TDC mark.  Haven't had a chance yet to implement, but will try tomorrow.