Hi there. I have in a moment of madness bought a 1984 600 kick start. Wiring was pulled to bits and I have manged to light up ignition, however I have no spark. Am looking to work from the magneto to the cdi first. So I have worked out the wires to the rectifier so now looking to test the pick up, does anyone know how. I presumed stick a meter and work kick start?
First, the rectifier wiring has NOTHING to do with the igntion circuitry, Fergie (assuming the same scheme as Generation 1 KLR650s).
The ignition (Capacitive Discharge Ignition, or CDI) is powered by alternating current from the exciter coil of your alternator; NOT any coil connected to the rectifier.
The pickup coil voltage (alternating current) can be checked with a multimeter as the engine is cranked (remove the spark plug for faster rotor rotation and higher readings, be sure ignition switch is ON and kill switch in the RUN position, safety switches (sidestand, neutral, clutch) in GO configuration.
So, you need to verify AC from the alternator coil to the igniter (CDI), and voltage from the pickup coil, when the engine is cranked. With these inputs, an operational igniter (CDI) will discharge through an operational ignition coil and fire your spark plug. Never mind the rectifier/battery circuit.