78 CB 750-K

Posted by Jeff Stock on Aug 04, 2012; 1:11pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/78-CB-750-K-tp4026396.html

Hi,
My 750 was running great when one day I rode it about a mile and it shut down. After pushing it home I found it had no fire to the plugs. SInce the engine was hot I suspected coils gone bad. I ohmed them out like the manual said and they checked good. This bike's ignition has been converted to Martek Industries CDI unit. When I try and start it hot, no go, but when I turn the ignition key off I get a monentary spark on the plugs. So that shows me the field is being broken but by the switch??
So not sure how to trouble shoot that CDI system, they are over $200.00 and so are coils. I hate just taking a shot in the dark by changing parts since that can get very costly.
Any help would be greatly appreciated.
Jeff