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Looking For Guidance On Helping Me Off The Ledge 01 Apr 2024 10:06 #897135

  • F64
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Your starter safety switch is on the clutch lever. 2 black wires.
You can bypass the switch by disconnecting the switch. Then connecting the two wires that go to the starter solenoid together. Tape that connection as it will be +12v when you press the starter button.

photo:  cometamoto.it

www.cometamoto.it/ricambi/ricambi-epoca-...2.1.23.99.gp.2671.uw
 
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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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 08:09 #897213

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I need a third hand to do the readings and my kid won't be home from school until later today. But I did get the clutch lever switch removed and the two wires into one.

Thanks as always

 
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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 09:16 #897218

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(my powder coat guy sat on the frame for 6 months)
 

I would be looking for a new powder coat guy.
 
1979 KZ400 Gifted to a couple of nephews
1967 Yamaha YCS1 Bonanza
1980 KZ440B
1981 Yamaha XT250H
1981 KZ440 LTD project bike
1981 GPz550
2013 Yamaha FZ6R

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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 10:34 #897223

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Is that wiring harness a 81 gpz 550 D1??
I do not see a yellow with red stripe wire going to the starter solenoid.
The yellow/red wire is +12v going to the low beam for the headlight.

The two wires going to the starter solenoid should be a solid black wire (like the wires for the safety switch). The next wire will be a black wire with a yellow stripe.

The colors on the solenoid itself are different, but that doesn't bother me. It's the wire colors on the harness that are suspect.


also disconnect the wires going to the solenoid(red circle)
meter set to resisance
measure the yellow/red wire and the black wire coming from the starter solenoid.
what is the reading?

Reconnect the wires

 
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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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:10 #897224

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The US spec KZ750H2 uses yellow/red for the starter solonoid ground and solid black for the feed so I guess it depends on the model, market and year the loom came from

 
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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:21 #897225

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and then it connects to a black with yellow stripe. wtf

we need to know which harness you have.

 
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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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:31 #897226

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100% 1981 GPz550 harness.

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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:42 #897227

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and then it connects to a black with yellow stripe. wtf

 
"Go figure" in 45 years of working with automotive electrical systems I have never seen a "direct ground connection" anything other than the recognised ground colour for that brand. You do have to ask "WHY"  !!!!!!!!!!!!!!!!!!!!

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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:50 #897228

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is it a 1982 harness?

The 1981 gpz550 has black/yellow for ground.
The 1982 gpz550 has yellow/red for ground.
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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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:53 #897229

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I just looked at a couple of 550 diagrams in the file base A1 and A2, both are the same as the 750 example I posted  !!

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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:55 #897230

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SOLVED

The eBay start button cluster I purchased "NEW" did not have this yellow lead coming off of it. With the known good cluster installed it turns over strong.

Thanks to ALL






 
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Looking For Guidance On Helping Me Off The Ledge 03 Apr 2024 12:56 #897231

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is it a 1982 harness?

The 1981 gpz550 has black/yellow for ground.
The 1982 gpz550 has yellow/red for ground.
I wonder if the seller was basing it on "first registration" year or "model year" (as we know model year changes in July) so an August 81 bike would be an 82 model year

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