I am looking at a 600E schematic. The neutral switch should have a sky blue colored wire attached. When the transmission is in neutral a ground it applied to the sky blue wire. To test the circuit, remove the wire from the neutral switch and touch to a good ground. With ignition on you should see a neutral light. If you do, then reconnect to the neutral switch and in neutral if you still do not see a light you have a defective switch. A temp fix is to permanently ground the sky blue wire and see if that allows the starter to function.

If you do not light the neutral light when the sky blue wire is grounded then the problem is most likely a disconnected or broken wire. The wire goes two places, one is the starter cutoff relay and the other is the plug going to the speedo where the neutral light is. Look for a relay that has the sky blue wire, unplug the plug and check for corrosion and or a broken wire. Try and add a jumper wire to the sky blue wire in the plug and ground it, see if the neutral light turns on with ignition on. If it does, then the problem is between the relay and the neutral switch. Try and start with the temp jumper at the relay.

There is one other place the neutral wire goes but I do not know where it is. It connects to a diode then ties into a black/white stripe wire. Probably inside the loom somewhere. The wire could be broken at that point too.

Hopefully by now you will have found the problem.

Please lets us know how it goes.

Steve

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'84 XT600 is now bored to 2nd oversize and new OEM pistons and rings installed. No more smoking.