Coil polarity question

Hello and greetings from Norway (please forgive me if my writing is not perfect).
My 99 VFR started surging a bit when the engine is warm, when cold it runs perfectly. I have found one spark plug cap which measures 300 kohm, the three others measures about 5 kohm. Anyway, the wiring to the coils confuses me a bit.
The coils (MP06) have one green and one black connector, as far as I can tell, the black/white wires to the coils are the constant positive supply. The other wires are pulsing negative from the PGM. Correct?
Can anyone please tell me if the black/white wires are to be connected to the green or the black connector at the coils? The reason I ask, three coils have the black/white wire connected to the black coil connector and the last one has it connected to the green connector. In my opinion, this is not correct.
I don't know which connection at the coil which is common for both the primary and the secondary winding in the coil, nor is it possible to measure it. If these wires are switched, then I guess the spark also would have to pass through the primary winding on its way to the spark plug?
I would really appreciate if someone knows for sure how the wires are supposed to be connected to the coils. In advance, thank you

 

Sorry I don't have a 5th gen... But.
Yes you are correct - The Black/White wire is Positive 12v and the ECM pulses the other wire to Ground.
As best as I can establish the +12v Black/White wire needs to be on the Green coil connector and the Ground Pulse wire to the Black coil connector.
The noise suppression resistors should all measure the same so no doubt the 300kohm one must be faulty.
Get this sorted and try fitting some NKG Iridium plugs CR9EHIX-9 and this might solve your surging issue.
Good Luck.

 

Thanks for answering. I've had my VFR for many years and it has been running fine - till now. Agree, one plug cap is faulty. Will replace it ASAP. I've bought new Iridium spark plugs, exactly the type you recommend, will change them when the surging issue is fixed.
I've searched for hours on the Internet, seems like a lot of Hondas and Kawasakis use this kind of coil, and all my searching has told me that the green coil connector is the negative connection and the black is the positive... I'm not sure but almost all information I find says black connection is the positive. Does not sound logically to me, as an electrician, black usually is negative / common.

 

Good to hear you have the Iridium Plugs ready to go. Why fit them "when the surging issue is fixed" ? The plugs may well be the cause or part of the cause of your surging issue!

Perhaps some 5gen owners might be able to confirm the coil connections for you? I had a look at the Laverda forum there is some info regarding the MP06 coils, there are a few members stating that Green is the +12v and the Black is the pulsed Ground signal.!

Don't be caught out by thinking that Black wires are Negative and Red are Positive when working with your bike! It's NOT always the way.......Example - Take a good look at the Engine Stop Relay coil in the attached drawing. It is fed by a Black wire from the Kill Switch and is the Positive 12v for the coil. The other side of the coil is a Red/Orange wire, this is a Negative or Ground supplied by the Engine Stop Sensor!

Also the most important +12v Power Wire on a 5, 6, 7 and 8 gen is the Black/White wire that feeds all the EFI stuff!

 

The reason why I want the surging problem fixed before I change the spark plugs is because I don't want to "hide a problem" with better spark plugs The bike has been working great for several years and the spark plugs was renewed about 6-7000 kilometers ago. Hopefully a new spark plug cap will fix the problem, but they must be made of gold. A new one costs NOK 1128, approximately €100.
You are right about wire colors. What I also found out is that Honda has their own color system. LINK
Regarding the coil polarity, I'm still not sure what's correct. Most places I read black is positive, but as you mention, some places green is described to be positive connection. The bike will work either way, but maybe with reduced spark. I was hoping a 5th gen owner could have a look to confirm what's correct