elektronik-sachse Digital Ignition /Charlies Place Ignition

G-Man · Post by **G-Man** » Fri Jul 22, 2016 6:10 am

Still a bit of misunderstanding there as our bikes never did have (proper) voltage regulation.

I think it is good practice to protect expensive electronics from voltage variations and spikes.

It's hard to get that smoke back in once you've let it out.... :-)

G

Tim Allman wrote:Well, here is my correspondence with Elektronik Sachse. It seems that their web site is misleading and that the ZDG3 unit does indeed require voltage regulation if you are using your alternator.

On Mon, 18 Jul 2016 14:53:18 -0400
Tim Allman <timothy@brasscats.ca> wrote:

> On a web forum about Honda CB77s and similar bikes there has been
> some discussion about your products. There is mention that your
> electronic ignition requires that a voltage regulator be installed
> but I can find no indication of that on your web site. In fact the
> wiring diagram
> (https://www.elektronik-sachse.de/ZDG3/H ... m_cb77.jpg)
> shows the ZDG3 attached to an unmodified CB72/CB77 wiring system,
> save the disconnection of the condensers.
>
> So, will your electronic ignition system work on a stock system
> without voltage regulation?

Our system needs 12V from the battery, nothing else. Strictly
speaking you can leave out the alternator and regulator/rectifier.
Then you have to recharge every 2-3 hours. That's how we operate our
race bikes.

For road bikes with alternator you need a mechanism to limit the
alternator voltage to approx. 11V-14V. This is done by a regulator.
But the stock one will do as long as it's working as designed. You
*can* upgrade the regulator as well (we happen to build regulators
as well). But that's *optional* and not a requirement.

Regards,
Marco Patzer

--
Elektronik Sachse MHP GmbH & Co. KG USt.-IdNr./VAT: DE815480713
Kloster-Oeseder-Weg 37 HRA 204024
49176 Hilter Gerichtsstand: Osnabrück
Phone: +49 (0) 5409 9069826
Web: www.elektronik-sachse.de

Tim Allman · Post by **Tim Allman** » Fri Jul 22, 2016 7:43 am

G-Man wrote:Still a bit of misunderstanding there as our bikes never did have (proper) voltage regulation.

I think it is good practice to protect expensive electronics from voltage variations and spikes.

It's hard to get that smoke back in once you've let it out.... :-)

G

You're right of course. I wrote back for clarification and here is their reply. In short, don't use their device without a regulator. The web site is plainly misleading.

On Thu, 21 Jul 2016 15:33:35 -0400
Tim Allman <timothy@brasscats.ca> wrote:

> The reason I asked is that the CB72/77 has no regulator. According to
> the Honda shop manual the voltage varies between 13 V (idle) and 17 V
> (> 3000 rpm). Is it correct , then, that the ZDG3 will be damaged by
> a standard CB72/77 system because the voltage will exceed 14 V?

Well, there's some safety margin. Our boxes will not fail when 14V
or 16V are applied, but I believe the maximum voltage is more like
17V-18V. So it might just work without regulator. But then you're
really using up all the safety margin.

You can use a Z-diode, which limits the current to a certain
voltage. The excess voltage is transformed to heat. That's
inefficient, but the easiest “regulator” that can protect the box.
Most old regulators actually work that way. The best solution is to
use a good electronic regulator.

Regards,
Marco Patzer

--
Elektronik Sachse MHP GmbH & Co. KG USt.-IdNr./VAT: DE815480713
Kloster-Oeseder-Weg 37 HRA 204024
49176 Hilter Gerichtsstand: Osnabrück
Phone: +49 (0) 5409 9069826
Web: www.elektronik-sachse.de

twinjett · Post by **twinjett** » Thu Jun 01, 2017 10:28 pm

I installed the Charlies Ignition system two years ago. I put a lawn mower 12 volt regulator on that I bought on Ebay. I have ridden about 3000 miles. It has been the best improvement that I have made on my 1966 CL72. It starts so easy cold or hot and never spits or misses. [/img]

davomoto · Post by **davomoto** » Thu Aug 10, 2017 11:04 am

I recently installed the Sachse ignition on my CB77 cafe bike. I will post some pics of engine build when I get a chance. It has the Bore Tech 64mm pistons, Harmon Collins roller rockers, ported head, CB750 Carbs, Capelinni intake manifolds, 6mm oil pump upgrade, oil filter, and oil cooler ready cover.

I initially started the bike on points while waiting for ignition to arrive. Advance unit is welded to full advance. The bike was a bear to start. After installing electronic ignition, I pushed to kick lever to TDC, went to push it a bit past TDC to kick, and the bike started!!! I don't have to "kick start" it, just get to TDC and push the kicker forward.

Since I was doing the Moto Melee, 3 days 900 + miles, I left the points set up in the top of the motor, and the condensor mounted as well so I could change back to points in a few minutes if the electronic failed. The bike performed flawlessly for the entire ride.

I use this regulator rectifier from ebay, and have it on 3 of my 305s. Cheap, effective, and so far about 3K miles on the cafe bike, zero issues.

http://www.ebay.com/itm/Voltage-Regulat ... XQ01tRUm7T

Davo

mark acker · Post by **mark acker** » Sat Sep 09, 2017 4:57 pm

Any current thoughts or discussion on electronic ignition? I have a 1967 CL77 305 scrambler. Having problems getting it timed correctly, wondering if this will help? It runs well at high RPM, but ratty at low RPM, won't idle either. Not sure if its timing or carburation.

I have replaced everything in the carbs, new points and plugs installed.

davomoto · Post by **davomoto** » Sun Sep 10, 2017 10:32 am

Are the slides installed correctly? Cutout should face air cleaner. Carbs cleaned thoroughly all orfices blown through with air? Put all stock jets and needles back in.

Tim Miller · Post by **Tim Miller** » Wed Oct 24, 2018 10:55 am

Davo,
Can you please expand how you wired up this 5-wire voltage regulator?
Is your Sachse unit still working well?

Thanks
Tim

davomoto wrote:I recently installed the Sachse ignition on my CB77 cafe bike. I will post some pics of engine build when I get a chance. It has the Bore Tech 64mm pistons, Harmon Collins roller rockers, ported head, CB750 Carbs, Capelinni intake manifolds, 6mm oil pump upgrade, oil filter, and oil cooler ready cover.

I initially started the bike on points while waiting for ignition to arrive. Advance unit is welded to full advance. The bike was a bear to start. After installing electronic ignition, I pushed to kick lever to TDC, went to push it a bit past TDC to kick, and the bike started!!! I don't have to "kick start" it, just get to TDC and push the kicker forward.

Since I was doing the Moto Melee, 3 days 900 + miles, I left the points set up in the top of the motor, and the condensor mounted as well so I could change back to points in a few minutes if the electronic failed. The bike performed flawlessly for the entire ride.

I use this regulator rectifier from ebay, and have it on 3 of my 305s. Cheap, effective, and so far about 3K miles on the cafe bike, zero issues.

http://www.ebay.com/itm/Voltage-Regulat ... XQ01tRUm7T

Davo