Ignition Coil: Although you mentioned replacing the coil, it's possible that the new one is faulty or not properly connected. Ensure that the coil is properly seated and that the wiring connections are secure.
Spark Plug Wires: Inspect the spark plug wires for damage, cracks, or loose connections. Replace any damaged wires.
Spark Plugs: Check the spark plugs to make sure they are in good condition, not fouled, and properly gapped. Replace the spark plugs if necessary.
Distributor Cap and Rotor: If your motorcycle has a distributor, inspect the distributor cap and rotor for cracks, carbon buildup, or damage. Replace these components if necessary.
Ignition Module: The ignition module is responsible for controlling the spark timing. Check the ignition module and its connections to ensure they are functioning correctly.
Grounding: Ensure that the engine and electrical components are properly grounded. Check the ground connections and clean any that are corroded or loose.
Battery: Check the battery voltage and connections. A weak battery or loose connections can affect the electrical system and cause ignition issues.
ECU (Engine Control Unit): If your motorcycle has an ECU, it may be responsible for controlling the ignition system. Check the ECU and its connections to ensure proper functioning.
If you have checked all of these components and are still not getting a spark, it's advisable to seek the assistance of a qualified motorcycle mechanic or consult a detailed motorcycle repair manual specific to your Kawasaki GPZ1100 for further troubleshooting steps and guidance.
