rotatethe flywheel by hand looking under it to make sure all magnets are there and in place not all slid to one spot. the take a 12v test light (will require helper here) turn the motor over with the key and clip one end of lite to ground then check on the voltage regulator/rectifer that you have a pulsing lite on both the yellow wires bother redwires and the gray wire, the purple if you have them may lightly too. that will test your rectifer/regulator, flywheel magnets, and stator