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Electrical Upgrades for Classic Honda Single

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Chazzman_bm
L Plate Warrior



Joined: 23 Nov 2008
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PostPosted: 21:57 - 11 Jan 2021    Post subject: Electrical Upgrades for Classic Honda Single Reply with quote

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.
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The Shaggy D.A.
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Joined: 12 Sep 2008
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PostPosted: 22:05 - 11 Jan 2021    Post subject: Reply with quote

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

http://www.boyerbransden.com/
http://www.pazon.com/ignition-system/Altair-universal-12v-6v
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Currently : Royal Enfield Classic 500 Despatch Limited Edition (28 of 200), CB Two-Fifty Nighthawk
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom
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Easy-X
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PostPosted: 22:54 - 11 Jan 2021    Post subject: Reply with quote

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 Sad
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 10:20 - 12 Jan 2021    Post subject: Reply with quote

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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Chazzman_bm
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Joined: 23 Nov 2008
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PostPosted: 11:52 - 12 Jan 2021    Post subject: Reply with quote

Thanks for the helpful tips and links folks. I'll have a look and see what will work best.
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oilyrag
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Joined: 07 Oct 2020
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PostPosted: 11:57 - 12 Jan 2021    Post subject: Reply with quote

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.
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Easy-X
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PostPosted: 14:27 - 12 Jan 2021    Post subject: Reply with quote

oilyrag wrote:
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.


A 12V setup does seem to make sense but something like "I want to charge my phone!" is not a good enough reason. There's something to be said for preserving a bike in its original state, necessity > whim Wink

Points vs electronic ignition. Again, what do you want out of this, are you having problems that you believe an electronic might solve?

RPM pickup can be done by wrapping a wire around the spark plug lead and counting the pulses.
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Chazzman_bm
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Joined: 23 Nov 2008
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PostPosted: 20:01 - 12 Jan 2021    Post subject: Reply with quote

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. Smile
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Easy-X
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PostPosted: 21:06 - 12 Jan 2021    Post subject: Reply with quote

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. Smile

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." Sad

By all means crack on with the 12V upgrade but you might just want to get the original ignition system going for now.
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 21:49 - 12 Jan 2021    Post subject: Reply with quote

Chazzman_bm wrote:


I plan on running LED lights and indicators with "classic" digital gauges so a decent 12v system is a must. Smile


It actually isn't. They make both items which work perfectly well on a weedy 6V system. It's almost what LED bulbs and digital guages are for.

No shortage of juice from a vape sytstem if it'll fit. Just run incandescents.

Mind you, if I had a CB100 the very first thing I'd change is the front brake.

Easy-X wrote:
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.


You do know 6v switchgear and wiring is rated for double the current load of 12 stuff (assuming the same power draw)? Wink
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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.
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steve the grease
Spanner Monkey



Joined: 26 Jan 2018
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PostPosted: 23:54 - 12 Jan 2021    Post subject: Reply with quote

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 -
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Chazzman_bm
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Joined: 23 Nov 2008
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PostPosted: 14:45 - 14 Jan 2021    Post subject: Reply with quote

stinkwheel wrote:
Mind you, if I had a CB100 the very first thing I'd change is the front brake.


That's already been taken care of my man. That was indeed one of the first things to go. I've had a two piston hydraulic system fabricated for it. The new setup is more than enough to cope with the engine moifications that have been done. There was a time I had more money than sense and had the engine capacity maxed out to it's limits, and fully built by a reputable engineering shop. Who knows, it might even be faster than my wife's KTM Duke 125 Very Happy

Easy-X wrote:
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.


stinkwheel wrote:
You do know 6v switchgear and wiring is rated for double the current load of 12 stuff (assuming the same power draw)? Wink


Let's just assume I know nothing because it's not far from the truth. Smile It's a labour of love though so I am fully empbracing the challenge.

steve the grease wrote:
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 -


I did find a couple of posts talking about the XL185 and XR200 motors having electronic ignition but I am not sure if every one of them had EI or only models made after a certain year.

The motor is a bit of a frankenstein now. The bottom end has been modified to take a much larger crank, the bore has been significantly increased to accept a 65.5mm Wiseco piston to mate with a 2-port head from an XL185 or XR200.
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stinkwheel
Bovine Proctologist



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PostPosted: 15:43 - 14 Jan 2021    Post subject: Reply with quote

Chazzman_bm wrote:


The motor is a bit of a frankenstein now. The bottom end has been modified to take a much larger crank, the bore has been significantly increased to accept a 65.5mm Wiseco piston to mate with a 2-port head from an XL185 or XR200.


So what crank? Has the output shaft been modified to take the CB100 rotor? If it hasn't, you need to know what the crank is off.
____________________
“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.
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Chazzman_bm
L Plate Warrior



Joined: 23 Nov 2008
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PostPosted: 16:17 - 14 Jan 2021    Post subject: Reply with quote

stinkwheel wrote:
Chazzman_bm wrote:


The motor is a bit of a frankenstein now. The bottom end has been modified to take a much larger crank, the bore has been significantly increased to accept a 65.5mm Wiseco piston to mate with a 2-port head from an XL185 or XR200.


So what crank? Has the output shaft been modified to take the CB100 rotor? If it hasn't, you need to know what the crank is off.


It has indeed.
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oilyrag
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PostPosted: 22:38 - 14 Jan 2021    Post subject: Reply with quote

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.
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