Author Topic: 1973 CB500 Neutral Switch elimination?  (Read 256 times)

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Offline 4Runner4Banger

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1973 CB500 Neutral Switch elimination?
« on: April 15, 2020, 04:42:41 pm »
I was wondering if it is possible to eliminate the need for wiring up the Neutral Switch?

For some background:
I am working on a torn down 1973 CB500. I got the bike for free but with everything torn off of it except the wheels, engine, and frame. My goals are to build out my own wiring harness for the bike and connect to an M.Unit Blue. Since the bike was received in such a rough condition, I figured it would be best to wire up the starter system and the ignition system to see what state the engine is in before going any farther. I have everything mapped out in these two systems except for the neutral switch. I have read in some places that you need to have it wired up in order to start the bike, and in others saying that you don't. Unfortunately, the places where I read you don't need it wired, didn't provide any clues as to how I could bypass or just eliminate it altogether.

I figure I have a few options but am unsure if it is possible:
1. Leave the Neutral Switch wire (green/red), that is coming from the engine case with the wires from the stator unplugged and out of mind.
2. I can connect the Neutral Switch wire to another wire that is receiving direct power so when the bike is in neutral it will ground as it is supposed to.
3. open for hearing your wisdom  ;D

Offline calj737

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Re: 1973 CB500 Neutral Switch elimination?
« Reply #1 on: April 16, 2020, 03:23:03 am »
Neutral switch is not required for your model of bike, never was. There was a Clutch Safety Switch integrated into some later year CBs.

For the purposes of test starting, ignore it and go. For a build, rideable machine, wire it in. It is absolutely foolhardy to delete it. Ultimately wire it to the gauge cluster as per stock (based upon whatever gauge you use).
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

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Offline 4Runner4Banger

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Re: 1973 CB500 Neutral Switch elimination?
« Reply #2 on: April 16, 2020, 09:19:55 am »
Thanks CalJ, that's the answer I needed. I do plan to wire it up once I get a cluster, probably the motoscope mini. The big thing was making sure that if I didn't wire it up for the initial test start, that it would not impede the engine from starting. One less thing to worry about troubleshooting if I don't get it right.