Author Topic: Round ignition switch connector cracked  (Read 560 times)

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Offline mathias2803

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Round ignition switch connector cracked
« on: April 12, 2019, 06:13:56 PM »
I understand that this part is known for breaking under the gas tank. Mine was glued and taped together, but now the problem has come back.
Connection is bad and the starter is running even with ignition switched of.

Is it possible to just remove the connector and rewire it with bullets or connector plugs? Would like to know if the round connector has any specific function that I need to pay attention to

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Offline HondaMan

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Re: Round ignition switch connector cracked
« Reply #1 on: April 12, 2019, 06:42:59 PM »
I understand that this part is known for breaking under the gas tank. Mine was glued and taped together, but now the problem has come back.
Connection is bad and the starter is running even with ignition switched of.

Is it possible to just remove the connector and rewire it with bullets or connector plugs? Would like to know if the round connector has any specific function that I need to pay attention to

Sent fra min E5823 via Tapatalk

This starter problem sounds more like the contact bar inside the start solenoid is sticking. It probably needs to be taken apart and serviced (as shown in my book!). The Ignition plug has little to do with the starter. It only enables to the Start button when the key is turned on.

Another 'fix' that lasts longer, if you don't want to buy a new one from Honda (don't get the aftermarket ones, they are not made quite right) is to convert the plugs of this switch to the white plastic housing with blade connectors, which carry almost twice as much current. This was Honda's solution, beginning in the K3. You can get the plugs at Vintageconnections.com: PM me if you don't know which one.
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline mathias2803

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Re: Round ignition switch connector cracked
« Reply #2 on: April 12, 2019, 07:00:22 PM »
Okey I assumed it had to do with the connector since it happend right after I... tried to measure the voltage going to the coil. I must have grounded it wrong since when I pushed the starter button I heard a "click" and everything went black. I thought it was the connector since the lights flickered when jiggling the connector.

Was hoping for a alternative connector I could get at a local store so I don't have to wait My bike is a 750 73 so I'm guessing someone installed the older plugs..

I think I need to look into the knowledge of this Hondaman book I've heard so much about

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Offline mathias2803

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Re: Round ignition switch connector cracked
« Reply #3 on: April 13, 2019, 12:13:22 PM »
I can now start the bike with the handlebar switch turned off. Does this sound like a solenoid problem or ignition switch connector problem?

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Offline HondaMan

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Re: Round ignition switch connector cracked
« Reply #4 on: April 13, 2019, 07:35:31 PM »
I can now start the bike with the handlebar switch turned off. Does this sound like a solenoid problem or ignition switch connector problem?

Sent fra min E5823 via Tapatalk

If it can run with the handlebars' switch at OFF then the wiring under the tank (or inside the headlight) has been altered from stock. The Black/White wire from the RUN-OFF switch on the handlebar should be plugged into the 2 Black/White wires from the coils, under the tank. Right now it sounds like the Black wire is hooked to the coils?
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com