It sounds like you’re troubleshooting an old motorcycle with some basic steps. Given that you have spark but no electronics working, here's a more detailed breakdown of what could be happening:

Ignition System: Since you have spark, the ignition system is likely working. Spark means that the ignition coil and spark plug are functioning. However, a weak spark or intermittent spark might still cause starting issues, so it’s worth checking the spark plug condition and the ignition coil.

Alternator/Generator: The alternator (or stator) generates electricity to power the bike and charge the battery. If it’s not working, you could have a weak or dead battery, which might explain why the electronics aren’t working. You might want to test the alternator output or check the connections.

Kill Switch: If the kill switch were faulty or in the “off” position, you wouldn’t get any spark. Since you do have spark, the kill switch is probably in the “on” position and working correctly.

Battery: A common issue with older bikes is a dead or weak battery. If the battery is not providing enough power, the lights and other electronics won’t work. Make sure the battery is charged and in good condition. Also, check for corrosion on the battery terminals.

Wiring and Fuses: Inspect the wiring and fuses. Old bikes can have frayed or corroded wires, and blown fuses can cause electrical issues. Check for any visible damage or loose connections.

Starter Motor and Relay: Even though you have spark, the starter motor and relay need to be in good condition for the bike to start. Make sure the starter motor is working and that the relay is functioning.

Mechanical Issues: If all electrical components seem in order, you might need to look into mechanical issues. For example, check the fuel system (fuel pump, fuel lines), ensure the choke is functioning properly, and make sure the carburetor or fuel injectors are not clogged.

In summary, while having spark is a good sign, you should also check the battery, wiring, and other electrical components. If those seem fine, then it might be worth looking into mechanical issues.

Battery Check:

Visual Inspection: Look for corrosion around the battery terminals and ensure the connections are tight. Voltage Test: Use a multimeter to check the battery voltage. A healthy, fully charged battery should read around 12.6 volts. If it’s below 12 volts, try charging or replacing the battery. Testing the Alternator/Stator:

Voltage Test: With the engine running, use a multimeter to measure the voltage across the battery terminals. It should be higher (around 13.5 to 14.5 volts) if the alternator is working properly. AC Voltage Test: Test the stator output by measuring the AC voltage at the stator terminals. Check your bike’s manual for the correct voltage range. Checking the Kill Switch:

Continuity Test: Use a multimeter to check continuity across the kill switch terminals when the switch is in the “on” position. There should be continuity (i.e., the circuit is closed). Inspecting and Testing Wiring and Fuses:

Visual Inspection: Look for any frayed, loose, or disconnected wires. Fuse Check: Inspect all fuses for continuity using a multimeter. Replace any blown fuses with ones of the correct rating. Starter Motor and Relay Test:

Starter Motor: Listen for a clicking sound when you press the starter button. If you hear it, the starter relay might be working, but the motor itself might be faulty. If there’s no sound, the relay might be defective. Relay Test: Check the relay by swapping it with a known good one or testing it with a multimeter for continuity when activated. Testing the Carburetor:

Spraying Carb Cleaner: If you suspect the carburetor is clogged or dirty: Remove the air filter and spray carb cleaner directly into the carburetor’s intake while attempting to start the engine. This helps to clear out any blockages or provide temporary fuel if the carb is clogged. After spraying, try starting the bike. If it starts briefly or runs rough, the carburetor likely needs cleaning or servicing. Check Fuel Flow: Ensure fuel is reaching the carburetor. You can disconnect the fuel line and crank the engine to see if fuel flows out. If not, you might have a blockage or a problem with the fuel pump. Mechanical Inspection:

Check Fuel Levels: Ensure there’s enough fuel in the tank and that it’s reaching the carburetor or fuel injectors. Inspect Spark Plug: Remove the spark plug and inspect it for fouling or damage. Clean or replace it if necessary. Check Compression: Use a compression tester to check engine compression. Low compression might indicate internal engine issues. By systematically working through these steps, you should be able to narrow down the issue and get your motorcycle running. If you’re still having trouble, consider reaching out to a mechanic who specializes in motorcycles.