Yep Next problem is.... a relay firing for the air horn causes the CDI to fire the spark plug..... sorted.... changed the relay.
The CDI , spark, relay issue... anyone have any thoughts ? The electric starter motor relay had been re-purposed to run an air horn, since starter motor done away with. The horn worked, but often, the engine, when stopped, would fire when horn button pressed. Some how, the relay was causing the CDI to create a spark. After a lot of tests and re-wirings, nothing changed... activating the relay caused a spark. Then I changed the relay....no more problem. I guess the inductance of the coil in the relay was causing a voltage spike, causing the CDI to unexpectedly fire.