1974 Z1 900

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16 Aug 2010 09:58 #391323 by Grapes5x
1974 Z1 900 was created by Grapes5x
Hello,
I need some help, I am not getting any spark. I have a Dyna III and new coils, Bike turns over and ligts are working, but now spark. Any ideas???:woohoo:

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  • TeK9iNe
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  • What did you do!?!
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16 Aug 2010 10:13 #391333 by TeK9iNe
Replied by TeK9iNe on topic 1974 Z1 900
Check the coils with ignition on: are they recieving battery voltage?

Plugs and wires new?

Points clean/good, and gap/dwell , timing set correctly?

GL.

B)
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

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  • stonemaster
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16 Aug 2010 12:19 #391418 by stonemaster
Replied by stonemaster on topic 1974 Z1 900
did ya hook em right???

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16 Aug 2010 12:47 #391423 by MFolks
Replied by MFolks on topic 1974 Z1 900
If no voltage at the ignition coils,check at the run/stop switch and start switch on the right handlebar switch pod.

If still nothing, open up the headlight housing and check for corrosion in the connectors or broken wiring.

Fuses look good? tight in their clips? no corrosion?
Battery connections clean and tight?
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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16 Aug 2010 16:47 #391487 by Old Man Rock
Replied by Old Man Rock on topic 1974 Z1 900
"I have a Dyna III and new coils, "....
Assumption is pre Dyna, the engine ran correct?

Is switched +12Vdc getting to the ignition plate and through to the coils?

Static alignments performed on the Dyna?

Engine case proper grounded battery (-)?

As already mentioned, Dyna wired correctly?

Time to get out the volt meter....
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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  • trianglelaguna
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16 Aug 2010 17:44 #391502 by trianglelaguna
Replied by trianglelaguna on topic 1974 Z1 900
hmmm.....hahahaha
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife

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17 Aug 2010 05:46 #391594 by Old Man Rock
Replied by Old Man Rock on topic 1974 Z1 900
Another thing, coil mounting... Are you sure you don't have the +12Vdc grounded/partially grounded to the frame?

Maybe these will help out....

Dyna Coil Installation:
kzrider.com/index.php?option=com_docman&...d&gid=469&Itemid=108

Dyna Ignition Plate Installation & adjustment:
kzrider.com/index.php?option=com_docman&...d&gid=449&Itemid=108

OMR
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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17 Aug 2010 18:36 #391761 by Grapes5x
Replied by Grapes5x on topic 1974 Z1 900
Ok update, I am reading 14.02 voltes at the coils. Could it be a bad Dyna III?

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17 Aug 2010 19:14 #391765 by Old Man Rock
Replied by Old Man Rock on topic 1974 Z1 900
Possibly...
Did you accomplish the static test? If it lights up pending crank rotation then most likely not the Dyna.

Engine frame ideally grounded?
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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18 Aug 2010 15:36 #391954 by Grapes5x
Replied by Grapes5x on topic 1974 Z1 900
Hey Old Man Rock,

First let me say thanks for all your help.

I checked the grounds and they are good. Let me tell you what happened, I was leaving for work one morning and she just died on me. I have all light working, 14.35 volts at the coils. 3.001 ohm of resistance at the coils. Did test from docs, still no spark!!!! Should I get a Dyan S or a Dyna 4?

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18 Aug 2010 16:15 #391960 by Patton
Replied by Patton on topic 1974 Z1 900
Dyna III is powered by splicing into a bike's harness wire providing switched battery voltage.

Such splice may have failed, whereby the Dyna III won't function.

Good Fortune! :)
1973 Z1
KZ900 LTD

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20 Aug 2010 14:33 #392545 by Grapes5x
Replied by Grapes5x on topic 1974 Z1 900
Does anyone else have any other idea?

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