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1979 RD400 Daytona Special Ignition Questions

Started by KANDY, January 05, 2022, 09:55:48 AM

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KANDY

Just Checked. Actually I have here Red, Brown and Black wires. Red to Brown and Black to Brown I saw the spike in AC when Kicked. I guess I should Look for a CDI :bang:
May I know any suggestion on CDI, I mean any compatible. If Someone have a good one Please let me know.
1974 RD350
1977 RD400
1979 RD400 Daytona Special

1976RD400C

'76 RD400 green  '76 RD400 red   '84 RZ350

KANDY

I think they look similar.
Mine in the pic
1974 RD350
1977 RD400
1979 RD400 Daytona Special

1976RD400C

Looks like that's the one you want. It is made by HPI in Belgium.   https://www.hpi.be/item.php?item=CD4402
'76 RD400 green  '76 RD400 red   '84 RZ350

1976RD400C

I can't see where the black with white stripe wire goes in your diagram but I think that is the shutdown wire so make sure that is not being grounded out at either the key switch or kill switch, or anywhere else after leaving the cdi box before ordering any parts.
'76 RD400 green  '76 RD400 red   '84 RZ350

KANDY

#20
Thanks,
The Black with White stripe wire is going to the Kill switch.
I checked all the input and Output for CDI bunch of wires and found for sure CDI is Faulty.
The conclusion came from Following measurements.

1. Resistance of Black/White to Ground is Infinite when Ignition ON position and Kill Switch RUN position. Resistance is 0 when Ignition OFF or Kill switch OFF position

2. Brown and Red AC Spike while kicking.

3. Brown to Black AC Spike While Kicking

4. Red/White to Black AC Spike While Kicking

5. Orange to Black No AC Spike While Kicking : This means to me that All in puts to CDI are correct but there is no output from CDI to Primery of the coil.

Please correct me if I am Wrong

Going to Order the CDI you Recommended.
1974 RD350
1977 RD400
1979 RD400 Daytona Special