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What is a CDI unit on the Superdream models?

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McCabe-Thiele (Ted):
I'm doing some more due diligence reading up on the CB500N Super Dream models - there are lots of references to the CDI unit.

So what on earth is a CDI unit & where does it do in laymans terms please?

Bryanj:
It takes the signal from two small coils on the stator and uses them to fire the ht coils for spark, i seem to remember that it is not a true CDI ( Capacitor Discharge Ignition) but a sort of electronic compromise.
I think Ash has disected one and can give more details, i do know that the workshop manual gave testing details BUT you had to have a very specific analogue meter, from memory a Sanwa sp 10 d

McCabe-Thiele (Ted):
Thanks Bryan, I've an acute case of Insomnia that has lasted a couple of days - not normal for me whatever normal is. ;D

Bryanj:
Thats ok mate, im at work till 6!
That meter i did have one bought in Yokohama in 75, not sure if i still have it!
There was amother specified meter which had a different set of readings for testing.
Never had a cdi box go bad at Meads only 1 400 generator.

McCabe-Thiele (Ted):
I've looked throught the parts list, I can see the coil, CDI unit, unless I've missed it where are the points or is this built into the alternator unit with its own crank poition sensor?

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