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Pick-up coil failure 31 Jul 2021 00:47 #852895

  • F64
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Could be fuel, spark, or air.
Tape up half of your airbox opening.
Does the #2 cylinder run better?
Take the tape off and slightly open the airbox.
Notice any difference in how #2 is running?
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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Pick-up coil failure 31 Jul 2021 12:59 #852912

  • badr0bot
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I replaced the air box with pods a long time ago so I took the 1 and 2 pods off and covered 1/2 the #2 intake with duct tape and the sputtering went away. Idle mixture screw needs adjustment?
87 KZ1000 P1

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Pick-up coil failure 31 Jul 2021 15:36 #852920

  • F64
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well, it's an intake issue.
It could be:
-your spark is weak and need a richer mixture to fire(ignition issue affecting only that cylinder)
-your carb is too lean(idle mixture may need to be adjusted as you mentioned)
-air leak

Try the mixture screw first as it's easiest then progress to harder items.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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Pick-up coil failure 01 Aug 2021 18:59 #853011

  • badr0bot
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I was able to richen the mixture with the idle mixture screw and got the #2 idling nicely without any pops. I took her on the road and it was still popping at speed. Came home and put the tape back on the intake. Took her back on the road and she purred like a cat without a single miss. Not sure what to do next besides leave the tape on the intake and be happy that she runs nicely like that.
87 KZ1000 P1

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Pick-up coil failure 01 Aug 2021 19:37 #853013

  • F64
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Good Job!
I'll leave that one up to you.
Glad it's running again!
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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Pick-up coil failure 01 Aug 2021 20:25 #853014

  • Mikaw
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I’d fix the problem. For some reason #2 is lean. Leaving the tape is a bandaid. It’s either an air leak or a plugged pilot jet. You’ll feel better knowing you fixed it. 
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Last edit: by Mikaw.

Pick-up coil failure 01 Aug 2021 21:05 #853015

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F64, thanks for all your help. I'm so happy I can ride again.
87 KZ1000 P1

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Last edit: by badr0bot.

Pick-up coil failure 01 Aug 2021 21:10 #853016

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Mikaw, I know it's a band-aid but I don't relish taking that carb apart.  I think I'll replace the masking tape with tin foil and live with it for awhile knowing she purrs that way. I might change my mind later.  I just want to ride her while it's still summer.
87 KZ1000 P1

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Last edit: by badr0bot.
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