What is a Speed Warning Unit?

[birdmannn101]

I am switching 78 harness to my 76 and found a device called a speed warning unit.  The latest owners manual I have is 1977 and it doesn't address it there.  I see in the schematic that it goes back to the speedometer and parking light.  Does this have something to do with the parking brake warning system or speed of the bike?  Is it adjustable?

[Re-run]

I have never seen mine work. All it did was make a terrible noise when you hit a certain speed. To let you know you should slow down. I suppose you can keep it if you really want it, but it isn't needed for anything.

[TOOLS1]

I think you are talking about the Hondamatic here. The 76 did not have this piece on it. It does not warn you of anything at any speed. What it does is turn off the the idle kick up at a certain speed. On the the 76 it just stays on the whole time the bike is in gear. I disconnect them on my bikes, mostly because I do not run the automatic carbs. And that is because I cannot get carb boots for them.
TOOLS

[Re-run]

Given what little I can see of the schematic, it looks like the buzzer my 78 had. It never worked when I got the bike, but that is because it had been disconnected. I put 12v to it and it was a very irritating sound. No wonder it was disconnected.

[TOOLS1]

Are you thinking of the turn signal warning buzzer that is attached to the fork ear? Most people did disconnect them, they were annoying. My buddy calls then a "Sereno Buzzer" because a friend of ours, F. Sereno, had me hook one up on his CB 550.
TOOLS

[Re-run]

That's possible. I never used the stupid thing and just yanked it out. It just looks like what he has in the schematic. Well, sorta.

[birdmannn101]

Thanks for the infor ReRun.  If anyone up here wants one PM me. 

Tools, This 1976 Hondamatic is a different bear as you well know.  With all this step the throttle up when you put it in "L" or "D" on the 77 and 78, but don't check that on the 76, just put a test light on it and check it while you drive crap, I feel like I am in the learning phase. 

You said, "I disconnect them on my bikes, mostly because I do not run the automatic carbs. And that is because I cannot get carb boots for them."  You have lost me and/or gone over my head with the term "Automatic Carbs.

Can you ramble on a little bit for me on this subject?  Need to learn all I can about this bike while I am attempting to restore it.

[TOOLS1]

By "Automatic" carbs, I referring to the smaller version of the "Keyhole" carbs used on the Automatics, and the 77-78 CB 550. The rubber boots that go between the carbs, and head are smaller then the ones for the "K" and "F" carbs, and are no longer being made by anyone.
On the 76 Matic the throttle kick-up stays activated as long as the bike is in gear, and can be tested by watching the solenoid work while shifting the bike in, and out of gear while it is on the centerstand running. The 77-78 has the "Speed warning" unit, and it shuts off the idle kick-up when the bike hits a certain speed.
If I were you, I would find a 77-78 wiring harness. There is just too many other differences between the 76, and the 77-78 to make it worthwhile. The connectors are different at the hand controls, and the instruments.
TOOLS

[birdmannn101]

Thanks Tools,

I did end up with a 78 harness and a speed warning unit which I guess doesn't need to be hooked up since I am using 76 carbs, right?  I might be able to keep the 78 carbs and let him have the 76 carbs if he doesn't mind.  I guess the 76 and 78 didn't have the automatic carbs since the boots look about the same size as the K model.

Looks like there is a difference on matching connectors especially with the control panel of the 76 to the 78 harness.  If you think I would be better off with the 78 carbs then I should probably keep the 78 airbox too, right?

Thanks for all the information.

[TOOLS1]

The carbs on the matics are all the same. The differences are in the wiring.
TOOLS