Boyer Brandsen Mark Four

I have used two of the Pazon ignitions on my 1974 Commando. Both have had power cutout issues. So I bought the Boyer Bransden Mark 4 ignition. For installation on the '74 Commando 850. I am having a problem with finding the exact simple wiring diagram for my bike. The box indicates that the Norton motorcycle is compatible.
Maybe my brain has a short circuit. So, I am seeing white wire to ground, black to -coil and red to black across, then positive coil to ignition. Correct? So simple, yet I want to get it right first time. Thanks guys. (and gals).

Assuming your bike is still positive earth/ground then white is negative so does not connect to ground but to white/yellow from the kill button or white/blue that connects to white/yellow or white if you bypass the kill button. Red is ground.
Wiring diagram here which should have been supplied with the ignition. For some reason the Boyer diagrams don't show a kill switch.
https://www.boyerbransden.com/pdf/KIT00053.pdf
If its been wired negative ground then yes white is earth/ground.
Use the diagram below for negative ground only, note that the harness wire colours could still be for positive ground so you would connect red to white/yellow or white/blue or harness white.
Whichever way it's wired then the box wire colours should be the same as for Pazon.

Both have had power cut out issues.

That sounds suspicious. Are you sure your basic bike wiring is correct?

Did you have either resistor plugs or resistor caps installed ?

I appreciate the input. Seems pretty simple. I bought the bike with hacked wiring and removed it all. I run a podtronics unit mounted in an air flow area and it does a good job of supplying the battery. So I wired the bike using the tenets learned from 25 years of air cooled VW repair.
I ordered the Mark 4 ignition which showed up with no wiring diagrams.
I appreciate the diagram as I want to get it right the 1st time. Thank you.

robertv said:

I appreciate the input. Seems pretty simple. I bought the bike with hacked wiring and removed it all. I run a podtronics unit mounted in an air flow area and it does a good job of supplying the battery. So I wired the bike using the tenets learned from 25 years of air cooled VW repair.
I ordered the Mark 4 ignition which showed up with no wiring diagrams.
I appreciate the diagram as I want to get it right the 1st time. Thank you.

Click to expand...

I also run two 6v coils and an inline voltage reducer. If I have more issues I will install the points and condensers like I have on my Triumph T 140.

A Boyer Mk 4 would use two 6 V coils in series, with no voltage reducer, whatever that is.

If by an "inline voltage reducer". You mean the OEM ballast resistor, You don't use one on an electronic ignition. You don't use the OEM condensers either. You can see info on the Boyer Branden web site on all their products.

Just saying... I used the Boyer III and IV with 12V coils. I eventually used a dual 12V coil with the IV. No ignition misfires.

As mentioned by Carl. There are diagrams, installation instructions, and troubleshooting information for Boyer products on their website. Stick to the instructions and recommended parts specifications.

I had a TriSpark that misfired a lot and finally stopped working, but it was the coil going out of spec and not the TriSpark silicon. Your 6V coils could have been a part of the cutout issue with the Pazon units. So could a lot of other things. I would definitely make sure those coils are good before using them again.