Honda 300ex quad electric start problems?

It's a honda 300ex in the 1990s and it's electric start. The neutral light won't light up, and it won't turn on. It's in neutral and the battery's fine. The headlights work, it's been doing this on and off for a week but now it just stays like this permanently. I need help, I don't know what it is. Someone please help!

The starter motor will not run unless the transmission is in neutral.
Because the neutral light is not on, the starting system thinks the transmission is in gear.
May need a new neutral light switch.
Unplug the wire at the switch and touch it to ground.
The switch is on the right crankcase cover (Light green/red wire)
Follow the wires to the switch.
If the light comes on, replace the switch.

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