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supressed plug caps

Posted: 02 Aug 2022 17:52
by 125H
I am not at all familiar with CDI ignition coming from the mag/dyno era, the last bike I had was fitted with twin coils and points.
So was just wondering if a CDI unit and specifically the Morini ignition requires a supressed plug cap to work properly.
I think I read some where that it may be the case but there is so much theory floating about, it may be just another 'experts' idea. What I read and if my memory does not fail me was that without supression the CDI unit could suffer from interference, sounds a bit far fetched but who knows.
If anyone knows if such a cap is required please let me know.

Re: supressed plug caps

Posted: 03 Aug 2022 07:18
by hendre
opinions differ on this subject but from the factory they had unsupressed caps. It is easy to convert a modern supressed cap to unsuppressed

Image

is in dutch but you get the point. just screw out the resistor and replace it with a metal (preferably copper) piece of metal. In the example a pallpoint spring but I would search for a piece of copper/brass rod that fits

Re: supressed plug caps

Posted: 03 Aug 2022 11:23
by 125H
thanks Hendre, that answers my question.

Regards
Leonard.