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no spark after 750 swap into 700
- wargoth
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- loudhvx
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It's possible the advancer rotor is 180 degrees out, or the black and green wires got swapped, or the spark plug wires are on the wrong cylinders.
The right hand coil should get the black wire and should connect to cylinders 1 and 4.
The left hand coil should get the green wire and should connect to cylinders 2 and 3.
When the 1 and 4 pistons are near TDC, the rotor should point toward the rear pickup which has the black and blue wires on it.
When the 2 and 3 pistons are near TDC, the rotor should point toward the front pickup which has the red and yellow wires on it.
EDIT:
I can't find a 1982 KZ 750 that has electronic-advance. They all had mechanical-advance.
The 1984 KZ700A1 (and ZN700A1) used the electronic-advance ignition system.
It is not compatible with mechanical-advance pickups.
You will need a mechanical-advance igniter (from many KZ models and years), or get a pickup and rotor from a KZ700.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
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- wargoth
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I am not totally sure of the new engine year, as i got it out of someones garage, not a complete bike. 1982 is as close to a year as i could find, might be 83
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- loudhvx
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(If it were using the mechanical-advance rotor, the module would only get a single pulse as the rotor passes the pickups. The electronic-advance rotor produces a split-pulse, or two pulses separated by a ramp. That's why the two rotors look so different. Your screwdriver test probably produces multiple pulses to produce a spark.)
I can post a diagram on how to wire the module to bypass the safety diode logic (kills ignition under certain conditions). I'll have to get to my other computer to dig it up.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- wargoth
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Will the 700's coils work with it or do i need to use the coils from the 750, not sure of the stock 700 coils rated primary resistance
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- loudhvx
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Save the 700 ignitor box though. That is not an easily replaceable item $$.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- wargoth
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- MFolks
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1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- loudhvx
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wargoth wrote: Ok, I have built an hei ignitor module for the bike. Have good spark on both coils. But will only run on 1-4. Checked timing after fixing advancer and 1-4 is right on the $. 2-3 is about 15 degrees retarded i cannot seem to figure out any way to adjust the pickups individually. Any help would be appreciated much.
Double check the pickup wiring. If you swap pickup wires, it may still spark, but with the timing delay as you describe.
It can also be a result of a pickup magnet being flipped the wrong way, if you've had it apart recently.
Details on testing pickup and magnet polarity are here:
home.comcast.net/~loudgpz/GPZweb/Ignitio.../PickupAndRotor.html
Do the voltmeter test for checking polarity and make sure the voltage is about the same for both pickups when moving the screwdriver the same speed.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- wargoth
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- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.