Dyna coil question

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22 Apr 2009 10:00 - 22 Apr 2009 10:02 #284052 by dshelly
Dyna coil question was created by dshelly
I,ve got a question about dyna coils. The 3 ohm green ones. I have two cylinders with sooty plugs. #1 and #2. The other two are nice and light brown. Running a Dyna s ign. and dyna wires. both new. timing is dead on and carbs have just been rebuilt and jetted identically. Also have done wired george coil relay mod.
So my question is.,,, can the coils produce a weak spark on one wire and a good spark on the other?

I forgot to mention , the bike is a '77 kz1000

Occupation:Machinist 25+ exp.
'77 Kz1000B1
'78 Kz1000A2
'76 Kz900LTD
Last edit: 22 Apr 2009 10:02 by dshelly. Reason: forgot info

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22 Apr 2009 10:38 #284059 by MFolks
Replied by MFolks on topic Dyna coil question
My understanding is the left coil fires plugs 1 & 4 and the right coil 2 & 3. How is compression on the sooty cylinders? Valve clearances been checked? Engine smoking on start up?

1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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22 Apr 2009 10:48 #284063 by dshelly
Replied by dshelly on topic Dyna coil question
compression is 135-140 all the way across. just did the valves this spring.

Occupation:Machinist 25+ exp.
'77 Kz1000B1
'78 Kz1000A2
'76 Kz900LTD

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22 Apr 2009 11:10 #284070 by MFolks
Replied by MFolks on topic Dyna coil question
Switch the plug and coil wires to see if the problem moves to the other good plugs to determine if the coil has gone bad(make a map of where the wires go before and after to reduce confusion).

1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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22 Apr 2009 13:28 #284097 by Patton
Replied by Patton on topic Dyna coil question
If not already done, would also assure fuel levels in carb float bowls #1/2 are not too high, by using clear tube test method.

Good Luck! :)

1973 Z1
KZ900 LTD

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22 Apr 2009 18:51 #284199 by Old Man Rock
Replied by Old Man Rock on topic Dyna coil question
Oh-Oh!!!!! :ohmy: Here we go..............

"carbs have just been rebuilt and jetted identically"

What about the air/mix/pilot screw adjustments and synch adjustments, have these been performed?

As Patton mentioned, float heights correct?

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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23 Apr 2009 05:00 #284324 by dshelly
Replied by dshelly on topic Dyna coil question
Well,

Patton hit the nail on the head. The float levels on 1 and 2 were a little on the high side. Probabbly around 1mm high ,but just enough to make them run too rich.
I guess the coil idea was just another brain fart on my part. :unsure:

Occupation:Machinist 25+ exp.
'77 Kz1000B1
'78 Kz1000A2
'76 Kz900LTD

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