Modifyed magneto

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This is another way to make a coil for the CDI.

It is made by Jorge M. Barrera, and this is his comments;

With this coil, I have sparks of 5 to 10 mm. 
I have not runned the engine with this one, but the spark looks good, the weight is reasonable and is really easy to build (only cut a piece of the magneto and wind some coil around. 
The former is optional, because only 30-50 turns give a good spark.  The insulation of secondary is better than we can do with our resources.