Please help. No spark at any cylinders

Posted by Jack on May 07, 2013; 3:44am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Please-help-No-spark-at-any-cylinders-tp4040370.html

Hello everyone, I am new to the forum, and new to fixing motorcycles. I have bought a 82 cb750f. I have been working on it for the past two years.

I have cleaned out the carbs, relined the gas tank, changed the front master cylinder, brake pads front and back, spark plugs and just recently changed the tires front and back.

The first summer I had the bike was when I made a lot of the repairs to the motorcycle. I got the bike running, then went on a tear to finish it and get her on the road. Last summer was when I started having electrical problems. I had a regulator that went bad, so I changed that. The bike ran good for a while.

With every time I ran the bike, it seemed to run a little worse, which leads me to my problem that I have been fighting for way toooo long. I have no spark at any of the cylinders.  It started with 1&4, then 2&3 stopped getting spark. I have changed the regulator, and the rectifier/spark units, and the ignition coils....nothing.  I can't understand how the bike went from aok to this. It has taken a lot of wind out of my sails.  

The only part I haven't changed is the pulse generator. Is it possible for the pulse generator to be dead, or worn out, or not sending enough power. I am at my wits end. I am so close to finishing this, but I am stuck, and have been for a while. Please help.