Electrical poor VDC at coils

damonrepko641
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06 Sep 2010 09:37 #396488 by damonrepko641

Electrical poor VDC at coils was created by damonrepko641

Coil voltage 8.46 key on kill switch on, unplug red wire from Dyna S voltage at Coil goes to battery voltage

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otakar
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06 Sep 2010 12:23 #396531 by otakar

Replied by otakar on topic Electrical poor VDC at coils

What is it with engine running?

74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

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damonrepko641
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06 Sep 2010 12:32 #396535 by damonrepko641

Replied by damonrepko641 on topic Electrical poor VDC at coils

Hard to say very hard to start, very poor idle, run out of battery if you get it to start, symtoms dont stay the same, got typical answers of change jetting, etc.

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otakar
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06 Sep 2010 12:38 #396536 by otakar

Replied by otakar on topic Electrical poor VDC at coils

I would go threw the weiring harness and clean all the connectors. Clean the ignition switch and the kill switch. What bike are talking about? It would help to know.

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damonrepko641
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06 Sep 2010 12:44 #396537 by damonrepko641

Replied by damonrepko641 on topic Electrical poor VDC at coils

I have 2 76 900s so parts swapping is easy, got carbs back from shop said they were trashed, would hardly run green bike (problem bike) throw them on other bike runs great vs29mm smooth bore, Ijust replaced all connections at coil Green dynas did'nt change anything. Without rambling bike is far from stock, and can't run with my other 9

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Old Man Rock
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06 Sep 2010 15:52 #396590 by Old Man Rock

Replied by Old Man Rock on topic Electrical poor VDC at coils

KZ900 electrical test/measurements....

1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter

Phoenix, Az

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damonrepko641
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06 Sep 2010 16:15 #396593 by damonrepko641

Replied by damonrepko641 on topic Electrical poor VDC at coils

Thanks for the input, here is what i found, off off-run- off switch yellow wire red trace unplug it at first conn. from switch, and rapid battery drain stops, but also no coil readings.

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Old Man Rock
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06 Sep 2010 16:24 #396598 by Old Man Rock

Replied by Old Man Rock on topic Electrical poor VDC at coils

Think you need this as well....

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Old Man Rock
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06 Sep 2010 16:27 - 06 Sep 2010 16:32 #396599 by Old Man Rock

Replied by Old Man Rock on topic Electrical poor VDC at coils

Minimum wiring....
You can actually bypass the ignition switch and On/Off Kill switch if you want through a 20 amp SPST switch and in line fuse if you want to get even further bare bone.....

Possibly your Dyna is whacked/shorting....

Get to minimum wiring and go through electrical measurements and testing.....

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Last edit: 06 Sep 2010 16:32 by Old Man Rock.

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damonrepko641
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06 Sep 2010 16:45 #396601 by damonrepko641

Replied by damonrepko641 on topic Electrical poor VDC at coils

Had brand new dyna on shelf install resulted in same results what is really strange is when you turn run switch to run with meter connected to battery voltage drop looks like a gas pump in reverse.

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otakar
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06 Sep 2010 16:57 #396604 by otakar

Replied by otakar on topic Electrical poor VDC at coils

Your Dyna should consume about 6.5A I have a feeling that there is a short somewhere or something is hooked up wrong. i know that the Dyna hook up is not rocket science, but things do happen. I have a Dyna on my 76 and with a quartz bulb in the headlight the charging system is about peaked out. The charging system is only about 12A The Headlight and Dyna draw about 10A.

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Old Man Rock
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06 Sep 2010 16:58 - 06 Sep 2010 16:59 #396605 by Old Man Rock

Replied by Old Man Rock on topic Electrical poor VDC at coils

Not trying to insult where you're 100% positive the Dyna was wired correctly?

Also... One member recently had a partial shorting of the Dyna coil +12Vdc on the coil mounts to frame... May want to check that as well...

Just in case...

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Last edit: 06 Sep 2010 16:59 by Old Man Rock.

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Electrical poor VDC at coils

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