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Author Topic: AUXILIADORA 1981 HONDA CB750K BUILD  (Read 3847 times)

Offline PRIMEWORKS

  • Posts: 21
Re: AUXILIADORA 1981 HONDA CB750K BUILD
« Reply #40 on: May 06, 2018, 00:23:41 »
Wiring questions for the wiring gurus

So I've come to the point in my wiring where I need some help. Wiring the motogadget was easy enough however incorporating the original components of the wiring harness are leaving my stumped. I'm going to point out everything as best I can and hope that someone can help me out cause at this point I only have the wiring and the tuning to go before this beauty can start!!

1. Regulator/Rectifier

So to break everything down and make it nice and simple the Reg/Rec has essentially 2 parts to it.

PART 1: A set of yellow and black cables (larger connector of the two) that connects to the stock alternator wiring. Easy given that its a direct connection)

PART 2: 1 Green wire, 1 Red wire, and 1 black wire (wires that are originally in the smaller connector.

             Red wire: Goes to my Starter Relay located on my Starter Solenoid ? Not sure how that would connect but that's what I've read on another
                            post

             Green wire: The ground (simple enough)

             Black wire: I need to splice the black wire in to the wire coming from the ignition switch(key), and going into the m-unit ? reason being is
                              that it needs to be connected to a wire that when the key is off reads 0 V to ground, and when the key is on the same wire reads
                              12 V to ground ?

2. Pulse Generator cable, spark units and the ignition coils

For the most part I've just been looking at this wiring diagram as it seems to be decently accurate, colours and all or at least I hope it is



Given I do what i mentioned with respect to the Reg/Rec and follow the wiring diagram I've attached for the Pulse Generator cable, spark units and the ignition coils would that work?? Any opinions would be appreciated!

Also, is there any recommendations for upgrading any components? I know a ton of people recommend upgrading the Reg/Rec given these bikes tend to have recharging issues but what about anything else?

Please remember to go easy on me in the case i ask very stupid questions hahah wiring just isn't my thing

Thanks everyone!

ps... GO JETS GO!!!!!!! WOOOOO





Offline 88SS

  • Posts: 82
Re: AUXILIADORA 1981 HONDA CB750K BUILD
« Reply #41 on: May 06, 2018, 08:21:41 »
The three most annoying things on the DOHC is the charging system, the carbs, and the ignition system. Upgrade these three.

Since you’re going with no airbox, I would start with the carbs. There’s a relay mod for the ignition coils. It basically bypasses the ignition switch. That paired with better coils will get you by for a while.


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