If your bike starts up when you push the ignition starter but shuts down as soon as you release it, there are a few potential causes for this issue. Here are some steps you can take to troubleshoot the problem:
Check the kill switch: The kill switch is a safety feature found on motorcycles that allows you to quickly shut off the engine. Make sure the kill switch is in the "ON" or "RUN" position. Sometimes, it can accidentally be switched off, preventing the engine from running properly.
Inspect the ignition switch: The ignition switch may be faulty or experiencing a loose connection. Check if the ignition switch feels loose or if the wiring connections are secure. If you notice any issues, it may be necessary to have the switch inspected and repaired or replaced by a qualified technician.
Verify the battery condition: Ensure that the battery has enough charge to power the ignition system. Low battery voltage can cause the engine to shut down after starting. Check the battery terminals for any corrosion or loose connections and charge the battery if necessary. If the battery is old or unable to hold a charge, it may need to be replaced.
Examine the fuel system: Insufficient fuel supply or a clogged fuel line or filter can cause the engine to start but then quickly shut down. Ensure that there is an adequate fuel level in the tank and that the fuel line and filter are clean and free from blockages. If necessary, clean or replace the fuel filter and inspect the fuel line for any kinks or damage.
Check the spark plugs: Faulty or worn spark plugs can lead to engine starting issues. Remove the spark plugs and inspect them for signs of fouling, wear, or damage. If necessary, clean or replace the spark plugs with the recommended type and gap specified by the manufacturer.
If these initial troubleshooting steps do not resolve the issue, it is recommended to have your bike inspected by a qualified mechanic or authorized service center. They will have the expertise and diagnostic tools to identify and address any underlying issues with the ignition system, fuel system, or other components that may be causing the engine to shut down after starting.