Electrical Upgrades for Classic Honda Single

[Chazzman_bm]

Hi Folks,

I have an old CB100N that I have been working on. I want to convert the ignition from points and condender to Electronic ingnition and generally upgrade the electrics.

The engine has undergone significant upgrades in capacity and no longer has the pickup for the tacho. I stumbled upon a post ages ago that suggested it might be possible to pick up the RPM from the engine, possibly even do some sort of electronic mod whilst doing the electronic Ingition upgrades. While I am at it, I would also like to convert the electrics from 6v to 12v to give me options for different lights and accessories.

I know very little about motorcycle electrics but I want to learn as much as I can to bring my project to life.

So, my questions are, 1) are there any off-the-shelf products available that will do the tacho and Ignition mods and 2) are there any suggestions for books to lear about motorcycle electronics for custom and modern motorcycles?

Thanks.
Chazz.

[The Shaggy D.A.]

You might have some luck with something like Boyer Bransden, or Pazon ignitions. Best to pop them an email.

https://www.boyerbransden.com/
https://www.pazon.com/ignition-system/Altair-universal-12v-6v
____________________
Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5

[Easy-X]

Funny, 6V to 12V conversions as kits are quite common on the ol' DT but then magnetos are much easier to work with. The consensus on the Interwebs is find a 12V stator and associated electronics from a similar/newer model. What that model is I couldn't say
____________________
Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[stinkwheel]

Vape make a powerdynamo system for the Honda XR80/100. I'm not sure how similar the motors are.

https://www.vape.eu/en/honda-cy80-cb80-xr-80100
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Chazzman_bm]

Thanks for the helpful tips and links folks. I'll have a look and see what will work best.

[oilyrag]

Does the bike run with the setup that it has now? If you don't have any knowledge of electrics I would start by trying to understand the system that it's got now before trying to change all of it.

[Easy-X]

[Chazzman_bm]

No the bike doesn't run; it's been in pieces for the better part of a decade. I am reviving an old hobby of building classic custom motorcycles and very little of the bike is still stock. Basically, I want to modernise the bike technically but still keep the old school look (sort of).

I plan on running LED lights and indicators with "classic" digital gauges so a decent 12v system is a must. The original wiring loom and electrics are shot anyway so I'll be making the loom from scratch and replacing whatever needs to be replaced.

I know what I want to accomplish, it's the how to get there that I am working on.

[Easy-X]

Ah, fair enough.

Well you know what you need for 12V, a stator that fits and then conjure up all the associated bits like reg/rec, indicator relay, switch gear, etc.

The electronic ignition though... I suspect you'll need a plate with some optical or inductive pickup to sit in place of the gubbins where the points used to be. You can then feed that onto a CDI. Sounds expensive given Google mostly showing Americans making such things "off the peg."

By all means crack on with the 12V upgrade but you might just want to get the original ignition system going for now.
____________________
Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[stinkwheel]

[steve the grease]

The CB100 shares it's heritage with the XL185 which had a cdi ignition, the points box/ cdi is a straight swap.
However the electrics were still 6v , but it's a start -
____________________
All the above is my personal opinion, you can see my lips move, but I'm talking out of my arse.
I've been riding, and fixing , bikes for 50 years, in that time the more I learn, the less I am absolutely sure of.....

[Chazzman_bm]

[stinkwheel]

[Chazzman_bm]

[oilyrag]

Have you thought about fuel injection? You've modified the engine a lot so it might be easier to get it running right and get the most out of it if you have fuel injection.