2mm axial play on shaft of Ducati ignition...

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Duccout
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Location: Essex UK

Re: 2mm axial play on shaft of Ducati ignition...

Postby Duccout » Mon Jun 01, 2026 9:14 am

Hi Roland,

I am not familiar with the Sachse ignition, but I do not think that the play will affect it. If it bothers you why not simply shim out the end-float? Do you have both 1mm thick shims on the shaft?


Cheers,

Colin

Roland
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Location: Germany

Re: 2mm axial play on shaft of Ducati ignition...

Postby Roland » Mon Jun 01, 2026 2:20 pm

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350 Scrambler, 1973

Roland
Posts: 51
Joined: Sat Jul 20, 2024 10:23 pm
Location: Germany

Re: 2mm axial play on shaft of Ducati ignition...

Postby Roland » Mon Jun 01, 2026 2:25 pm

Hi Colin,
it is 2x Nr. 5, i understand.
Never took the cover off, there was no reason.

So the internals behind the cover are all the same for all types of ignition?

Will ask Sachse directly.
If i can avoid lifting the cover, fine!
350 Scrambler, 1973

Duccout
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Joined: Wed Feb 05, 2020 1:20 pm
Location: Essex UK

Re: 2mm axial play on shaft of Ducati ignition...

Postby Duccout » Mon Jun 01, 2026 5:46 pm

Hi Roland,

Certainly all the Ducati singles engines that I have owned have had that axial play on the shaft, and it does not seem to affect the operation of the ignition system. I have Electrex World systems on my 250 and 350 and they operate ok.

Cheers,

Colin

Roland
Posts: 51
Joined: Sat Jul 20, 2024 10:23 pm
Location: Germany

Re: 2mm axial play on shaft of Ducati ignition...

Postby Roland » Tue Jun 02, 2026 1:38 am

Thanks Colin,

i am convinced now, it will be ok.

My conceptual error was to believe the Sachse-rotor covers the pcb.
That would be critical, but the diameters of rotor and pcb are on the same height, and that makes it tolerant.

Thanks!
350 Scrambler, 1973

Klaus
Posts: 6
Joined: Mon Mar 17, 2025 7:46 pm
Location: Wetzlar/Germany

Re: 2mm axial play on shaft of Ducati ignition...

Postby Klaus » Fri Jun 05, 2026 7:11 am

Hi Roland

I now have three Scramblers and two Desmo single-cylinder engines with Sachse ignition and have been very satisfied for six years. If you ever have any questions, just give them a call. The support is easy to reach, friendly, competent, and helpful.

Best regards

Klaus

Roland
Posts: 51
Joined: Sat Jul 20, 2024 10:23 pm
Location: Germany

Re: 2mm axial play on shaft of Ducati ignition...

Postby Roland » Fri Jun 05, 2026 8:25 am

Hallo Klaus,

yes, Sachse already confirmed the axial play to be not relevant for the function of ignition.

Right now, i am thinking of managing this work, will need some special tools.

Klaus, habe dir eine Nachricht geschickt.

Gruß, Roland
350 Scrambler, 1973


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