[8ball]

TR why do you keep talking about the charging circuit? He only asked about the CDI/ ignition circuit (which you also touched on).

 

[8ball]

Because he is using 'number of pins' to describe connections that can only relate to the charging circuit. That has little to do with the ignition circuit which is the CDI part.

I don’t see where you got that. The charging circuit you posted has a 6 pin and 4 pin connector. Not a 5 pin. But I see no 5 pin connector anywhere, so I don’t know how you jumped to that conclusion.

But anyway, I’d be more wary of the fact that the two CDI circuits you posted show the 6 pin connector wired to the pulse generator on one bike and on the other bike it’s the 4 pin connector wired to the pulse generator. You noted that you thought it was a typo, but I’d be mor inclined to think it was a way to make the CDIs model specific. OP, I’d make sure the wires to the pulse generator on both bikes actually go to the same connector.

 

[8ball]

5 wire and 6 pin connector are two different things. This is a typical 5 wire reg/rec connector. It would be listed as a 6p connector on a schematic because it has 6 slots.

And why would Honda make a spark unit model specific? I can think of one reason off the top of my head: the spark unit determines the rev limit. And I’d think a 400cc v-twin probably has a different rev limit than a 750cc four….

 

[8ball]

That would be a huge fail, rev limiters work by curbing the fuel supply, not by removing the ignition. Thus has it always been..

I’m curious how you think that was accomplished on these carbureted bikes?

 

[8ball]

I can 100% guarantee you that 90’s sport bikes had rev limiters incorporated into the cdi’s. The old Gixxer squid morons loved it! Quite often you could go to a bike night and they’d be lined up bouncing they’re bikes off the rev limiter, backfiring to kingdom come and turning their exhaust pipes into glow sticks.

 

[8ball]

Interesting video, but really adds nothing to the argument. We’re talking about two bikes, neither of which have mechanical (centrifugal) spark advance units, so the spark timing control is programmed into the spark unit…..and consequently so is the rev limit set point.