1983 GPZ 1100 Fouling plugs

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1983 GPZ 1100 Fouling plugs

16 Apr 2015 07:02
#668184
Hi guys. My 1100 GPZ takes at least 3 min to warm up with the choke half way up, when it reaches to temp the RPM increaces until I turn the throttle or flick the choke back down.
If I were to ride the bike without warming it up the engine it would bog down when I give it gas/thrttle. this would foul and damp the plugs with gas.
I was wondering if I were to use a DYNA COIL 3 OHM if it would fix this morning start up problem and fix the fouling plugs.
thanks

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  • baldy110
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Re: 1983 GPZ 1100 Fouling plugs

16 Apr 2015 12:30
#668230
Since the Mikuni BS34 carbs on that model do not have an accelerator pump how does the plugs get fouled when you turn the "choke" off and ride It before it warms up.. Are the plugs actually fouling out and failing to fire?
On mine on the first start of the day I turn the choke on and when the bike fires up I turn the choke and off and ride it. Yes it carburates likes shit until it is warmed up but usually does so only for a few minutes. You cannot expect fuel injection performance from carburators. No a Dyna ignition will not fix your issue, your bike already has electronic ignition.

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Re: 1983 GPZ 1100 Fouling plugs

25 Apr 2015 19:29 - 28 Apr 2015 19:18
#669562
Here are some pictures of what coulor the plugs are. The bike has been sitting for almost 2 weeks so they are not wet.


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Last edit: 28 Apr 2015 19:18 by man-of-war.

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  • SWest
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Re: 1983 GPZ 1100 Fouling plugs

25 Apr 2015 21:06
#669573
Don't look fouled to me.
Steve

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Re: 1983 GPZ 1100 Fouling plugs

25 Apr 2015 21:34
#669578
what year gpz 1100?with fuel injection?no carbs correct.
original owner of a 1984 gpz 750
1985 turbo 750 stock, being restored.
1984 gpz 750 with 810 cc wiesco's megacycle cams(471-10) 34 mm flatslides v&h pipe ported head dyna ignition. bottom end, crank case from turbo 750 and sprockets.

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Re: 1983 GPZ 1100 Fouling plugs

25 Apr 2015 22:02
#669582
Those plugs look like too lean of fuel mixture for full power....to me
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Re: 1983 GPZ 1100 Fouling plugs

26 Apr 2015 06:05 - 26 Apr 2015 06:06
#669593
No fuel or no spark, no carbon.
Steve
Last edit: 26 Apr 2015 06:06 by SWest.

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Re: 1983 GPZ 1100 Fouling plugs

26 Apr 2015 06:47
#669597
i would check the temp.sensor and the T.P.S..you might have to clean the T.P.S. and readjust.
original owner of a 1984 gpz 750
1985 turbo 750 stock, being restored.
1984 gpz 750 with 810 cc wiesco's megacycle cams(471-10) 34 mm flatslides v&h pipe ported head dyna ignition. bottom end, crank case from turbo 750 and sprockets.

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Re: 1983 GPZ 1100 Fouling plugs

28 Apr 2015 20:08
#669927
I clean the plugs by sodar blast them. install and start with choke/''the fast idle '' when @ operating temporature the idle increaces to 1500 rpm this is where I flip the lever down/off.
At this point the plugs will be black and wet.
the pictures below showes fresh plugs one morning start and a half hour ride.

I took the bike out again today so the pictures below will show a second morning start and a half hour drive,

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Re: 1983 GPZ 1100 Fouling plugs

28 Apr 2015 21:44
#669937
Not fouled. Too lean and or no spark.
Steve
This is one of two threads on the same subject.

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Re: 1983 GPZ 1100 Fouling plugs

29 Apr 2015 06:07
#669949
It will seem the condition did clear up a bit from last year I should have given you guys the history on this bike. I did an engine job almost 2 years ago and to this day I cant get the engine to idle correctly. The picturs below was from last year when I had no clue why the engine would hot fire up due to fouling plugs
The picturs I am posting of the plugs above are not the true colour they are truly black and the white electrode is brownish red. here are some pictures of what it used to look like last year.

[IMG


[IMG


[IMG

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Re: 1983 GPZ 1100 Fouling plugs

29 Apr 2015 06:14
#669950
What you're looking for is a peanut butter color. Looks like you're burning a little oil. Not fouled. Check for vacuum leaks for the idle problem.
Steve

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