If your motorcycle’s battery isn’t recharging due to a faulty stator, it won’t have enough juice to activate the ignition spark fully, and your bike will have starting problems. Motorcycle stators degrade over time due to engine heat and vibration some model stators last longer than others, but eventually wear out. The stator is the part of your motorcycle’s battery charging system responsible for converting the mechanical energy generated by your motor into a Direct Current the battery can use to recharge while you ride. That said, the only true fix for a faulty Capacitor Discharge Ignition box other than to replace it with a new one.Some riders claim they could get their bikes to start without starter fluid by opening their CDI boxes and fixing the broken solders.Once worn, a faulty CDI will definitely cause some severe ignition problems, like making it hard for your bike to start without starter fluid. While CDI box failure isn’t common, overheating and bumpy off-road riding can compromise the soldering on some older boxes, wearing them out in time. Your CDI box is what we call the Capacitor Discharge Ignition unit, the electrical device responsible for regulating a fuel-injected bike’s ignition system. If the resistance rating is higher than the ideal range in the manual, it’s the pick-up coil that’s faulty, and you’ll have to replace it. If your resistance coil reading is 1, you have no continuity, and one of the wires might be damaged. Test the two wires that run to your pick-up coil and compare the reading to the ideal range listed in the service manual associated with your specific make and year model motorcycle.You can test your pick-up coil with a multimeter set to the 2,000 Ohms resistance test selection.If the pick-up coil is faulty or worn out, the spark plug won’t spark, and your bike will have starting problems unless using started fluid. Your pick-up coil is the component responsible for generating the timing signal that regulates your ignition system. This secondary resistance reading should be between 5,000 and 15,000 Ohms, depending on your make and year model moto consult the more specific range listed in the service manual or have a pro test it to be sure.Now, test the resistance between one of the coil’s tiny terminals and the spark plug cap (which should still be disconnected).This primary resistance should be 0.2-5 Ohms, depending on the spec range listed in your bike’s service manual.If there’s only one terminal, test the resistance between the single terminal and the ground on the bike’s frame. Disconnect the two tiny primary wires from the ignition coil and use the multimeter to measure the resistance between the two terminals.Unhook the spark plug wire from the coil.First, make sure the ignition is in the OFF position.Once again, you can be sure your coil is the culprit by testing it with a multimeter. In that case, your motorcycle will be difficult to start without starter fluid until you replace the worn coil. Suppose your ignition coil’s primary or secondary resistance is lower than the ideal range. Typically, they say your cap’s resistance should be less than 5,000 Ohms when unhooked and separated from the spark plug.Īnother issue that can cause your motorcycle to have starting problems, like not starting without starter fluid, is a failing ignition coil. ![]() The ideal resistance range can vary from year model moto to moto, so refer to the service manual for your specific bike.Once free from the plug, use a multimeter to test the resistance by setting it to read Ohms.To find out if the spark plug cap is your problem, pull the cap off the spark plug and coil wire-some caps pull right off, others need to be unscrewed.If the cap’s resistance interferes with the surge to your spark plug, your bike won’t start without the extra jolt starter fluid provided. If your motorcycle’s spark plug cap produces more resistance than it’s designed to, the additional resistance can hinder the current from entering. ![]() Undercharged Battery Contaminated or Loose Terminals
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