Replace the ignition cylinder in a 1987 Yamaha fz700

If you're experiencing a lack of spark on the front two cylinders of your 1987 Yamaha Venture Royale 1300, here are some steps you can take to troubleshoot the issue:

1. Check the spark plug wires: Verify that the spark plug wires are securely connected to both the ignition coils and spark plugs. Ensure they are not damaged or frayed. If you have swapped the wires and still don't have spark on the front cylinders, it's less likely to be an issue with the wires themselves.
2. Inspect the spark plugs: Remove the spark plugs from the front two cylinders and inspect them for fouling, wear, or damage. If the plugs are worn out, fouled, or damaged, replace them with new ones of the correct specification.
3. Test the ignition coils: Although you mentioned replacing the front coils, it's still possible that the used replacement coils are faulty. You can test the coils using a multimeter to check for proper resistance values. Consult the service manual or contact a Yamaha dealer for specific resistance values and testing procedures for your particular model.
4. Check the ignition system components: Inspect other components of the ignition system, such as the ignition control module (CDI), ignition switches, and wiring harness connections. Ensure all connections are secure, and there are no damaged or corroded wires.
5. Verify power supply: Confirm that the ignition system is receiving power. Check the fuses related to the ignition system and ensure they are not blown. Test for voltage at the ignition coil connectors to ensure there is proper power supply to the coils.
6. Consult a professional: If you have gone through these troubleshooting steps and are still unable to identify the issue, it is recommended to seek assistance from a professional motorcycle technician or a Yamaha dealer. They will have access to specialized diagnostic equipment and expertise to diagnose and resolve the problem.

Electrical issues can be complex, and it may require expertise beyond basic troubleshooting. A professional technician will be able to perform more in-depth diagnostics to pinpoint the exact cause of the lack of spark on the front cylinders of your motorcycle.

The instructions at the link will work for 1987 as well. 1990 Chrysler New Yorker Lost Keys How Do Remove the Igni

Put the key in the helmet lock and turn it anti clockwise. You will feel a little resistance and hear a slight click as you release the seat latch. Lift the rear of the seat and pull it backwards, job done.

Replace the ignition switch, which is behind the lock cylinder.

That job requires a partial disassembly of the steering column, with some specialized tools, to access and remove the ignition cylinder hold-down bolt.

most likely your key is worn to much. Try another key for that car first. If that is'nt it, then its likely the key cylinder is bad

Take out the present master cylinder. Dismantle and clean/dry the cylinder. Inspect the cylinder for scratches. Replace with new kits.