TOPIC:

Finally got my 79 KZ650 running fairly well.  Unfortunately, yesterday when I turned the kill switch to the Run position, I heard a click/pop near the fuses.  The fuses all appear to be intact but obviously the starter portion of the electrical system is dead.   What else should I be checking?   I should note that I'm fairly ignorant when it comes to the electrical system and apparently too old to learn the intricacies of diagnosis.  

Do your ignition coils have voltage on the yellow/red wire with engine kill switch set to "run" and key "on"?

Fuses can be look okay from the outside view but can fail internal. They have to be continuity test with a multimeter!

Thanks for the ideas.   I've been very fortunate that previous bikes (mostly Honda's) that I've tinkered with over the years have had very minimal electrical issues.  So,  I've never learned much about diagnosing the problems.  

SRQ Mike wrote:

Thanks for the ideas.   I've been very fortunate that previous bikes (mostly Honda's) that I've tinkered with over the years have had very minimal electrical issues.  So,  I've never learned much about diagnosing the problems.  

You find find the attached fault finding guide useful

www.kzrider.com/forum/forum-index/faq-wi...-fault-finding-guide

Follow-up:   After rechecking fuses, cleaning the contacts in the kill switch, reading about electrical systems and beating myself up
for not knowing much about electrical systems, I found the problem!  It was a faulty connection on one of the wires which connects
to the rectifier.  Bike is now running great!   Thanks!