Topic: Rectifier/Regulator plug different than stator harness plug...Help!! :)

[Foyil100]

Hi everyone,

Its been awhile since I've posted here, my 1978 CB750F project has been on hold for while since I've been moving around but I finally got a chance to work on it a bit this weekend and when putting some new parts on I ran into this issue below.

I ordered a OEM Style Honda Rectifier-Regulator (from Ricks) for my 1978 Honda CB750F and then also ordered a new Stator Wire Harness for my bike as well (from VintageCB750.com). However, once I went to install the items I noticed the rectifier/regulator had a 6 prong plug (male) and the stator harness plug was a 8 prong plug (female) with 7 wires connected. I do have a 6-prong female plug that will fit the rectifier/regulator that I could use if I swap it over but then I'll have to drop a wire from the stator harness.

Could anyone provide some guidance as to how to plug these in together? I've attached a few photos to show exactly what I'm looking at.

Thanks in advance!!

P.S. I've also included a pic of the bike when I "finished" it last year...But we all know how that goes, these things are never "finished"!

New harness for the bike






Here is the original connection


Thank you very much in advance!

[calj737]

The original harness connector had the OIL and NEUTRAL wires (Blu/Red and Gr/Red respectively) plugged into that harness connector. The Rick's does not provide for them. You can simply remove the 7 wires from the new stator harness, use a female 6-pin connector and plug the wires into the corresponding slot to connect to the Rick's. Then, you need to resolve connecting the 2 loose wires (OIL and NEU) to their respective Main Harness connections.

OR, you can get a new 8-pin female connector, unplug the Rick's wires from it's 6-pin, and install them. It doesn't really matter which way you go.

Those wires are held in place with small "tabs" on the end of the spade. Push the wire further into the connector, use a very small, flat screwdriver (like an eyeglass screwdriver) and depress the tang. Then pull the wire out from the rear. Raise the tang, and press into it's new location. Now you're an electronics master! 

[Yamahawk]

Ok, I think I see the dilemma... Your Ricks VRR plugs into the stock harness, not into the Alternator connection, at least mine does on the STOCK harness. The STOCK harness has an 8 pin connection that plugs into the alternator harness you got from VintageCB. I ordered a new one also from 4-1 and replaced the old connectors with new bullets also. The Ricks VRR has two harness connections on my older style, one has the 6 pin block, the other has the three spades that hook up the where the old regulator connected to. Now, your 78 harness probably has a block connector where mine has the three individual spades. Did you re-use the stock harness, or did you build you own? I have a feeling that your harness isn't stock, seeing that you have customized a few things, bike looks very nice! Now, if that's the case, Cal is correct in the you have eliminated the proper connectors from your bike, and will have to redo the spades into an 8 pin connector for the alternator harness, using a combination of the two 6 pin connectors from the Ricks VRR.
Charlie

[Foyil100]

Thanks Calj (not the first time you've saved me on here!!) and Yamahawk! That feedback is much appreciated! It looks like you're both right in that I'll have to swap the 8 prong for the 6 prong which shouldn't be a problem at all. Now in the back of my mind I've got to figure out where the OIL and NEUTRAL wires go! 

[calj737]

They go to the gauges, running through the main harness along the backbone. Isn't this a MotoG install? Remind me, what gauge are you running in front? Those 2 wires are the "ground" inputs for your gauge idiot lights. You power them with AUX.

[Foyil100]

Yup, MUnit + Motogadget Chrono Classic Speedometer

[calj737]

So those two extra wires can readily come out of the new stator harness. Just terminate them into their own 2-pin moles, then make a new full length 2 wire harness to take those up to the Chrono. Simple. (It’s also how I do all mine).

[Foyil100]

So those two extra wires can readily come out of the new stator harness. Just terminate them into their own 2-pin moles, then make a new full length 2 wire harness to take those up to the Chrono. Simple. (It’s also how I do all mine).

Perfect, I'll give it a go! Thanks again CalJ!