Coil question

  • Thread starter Thread starter Terry Dymond
  • Start date Start date
Terry
Orange and white are power so they go to the + side of the coils
Black are the signal so they go to the - side of the coils
did you mark them? if not then you could get them the wrong way round... the middle length one will be for No 2 so then you just got to hope that you get the other two the right way round,
What ignition are you running if something other than the standard one then the wires to the connector should be colour coded anyways and if so then pick it i boo not that hard
Brett
 
power wires (orange/white) connect to the green tabbed side of the TEK coils

cheers

 
G'day Brett and Red,
Thanks for the info; Brett, I'm running DMC II ignition and have the wiring diagram so knowing which coil supplies which cylinder isn't an issue.
The new coils aren't marked with a + or - so the connector colours are the only thing I've got to go by.
Red has answered the question, orange/white to green.
Thanks guys, all is good.
 
Terry, the coils were a straight fit on the original mounting frame, exactly as my original Motoplats, only the HT lead is opposite in compare with the originals.
The green connector on the MP06 coils is the positive 12V (3 x orange/white wires) and the black connector (orange, green and black wires) goes to the ignition that shortens the primairy side of the coil to earth. This induces the field in the coil at the secondary winding that gives the HT. I assume that the MP06 and the KP03 have the same colour coding for their connectors.
Hopefully it?s a bit clear now Terry, but maybe you or somebody else knows what TEC or TEK stands for, so we can check info on the web.

grtz and suc6 with the change over,    Ren?
 
Thanks Rene and Jugs. All sorted, the coils are now on the bike. The trick was to mount the coils 180 degrees to the originals as Rene pointed out.
Thanks guys.
 
Well, the coils, plugs, plug caps and HT cables (all three) have been changed and the bike started: What a difference, the yellow peril idles much more smoothly, fewer rattles from the clutch and for some reason, the tacho is more responsive.
Will have to wait for the weekend for a test ride. Reckon the smoother idling may be due to the new plugs more than anything else.
 
Have found the same experance with all 4he bikes Ive changed coils on. Im inclined to think newer coils give stronger spark hence better / smother combustion at the idle with less accurate mixturer
Could be wrong though
Have fun on the week end Leggs
 
Terry Dymond said:
The wreckers came up good, now have three Tek KP03 coils and three new NGK spark plug caps, all I need now is a length of copper-core HT lead and I'm good to go.
Click to expand...

Do we have to use copper core HT with the above coils and caps, or can silicon leads be used? I don't understand the theory behind this?

Regards, Greg
 
ghwallice said:
Do we have to use copper core HT with the above coils and caps, or can silicon leads be used? I don't understand the theory behind this?

Regards, Greg
Click to expand...

Hi Greg

The silicone plug leads are high resistance type. The conductor is basically a carbon-impregnated silicone (or latex). If you use this type of HT lead, then you need non-resistor type plug caps.

If you use copper core HT leads, then you'll need to use resistor caps (5 K Ohms).

I'd suggest you check what sort of spark plug caps you have and make a choice of HT lead based on that.

Cheers,
Cam

 
Dellortoman said:
Hi Greg

The silicone plug leads are high resistance type. The conductor is basically a carbon-impregnated silicone (or latex). If you use this type of HT lead, then you need non-resistor type plug caps.

If you use copper core HT leads, then you'll need to use resistor caps (5 K Ohms).

I'd suggest you check what sort of spark plug caps you have and make a choice of HT lead based on that.

Cheers,
Cam
Click to expand...


Yeh, I've 5k ngk. will chase copper. thanks for that...Greg
 
I've got a set of coils off a VFR which I want to fit at some stage.  Seem to remember earthing one of the HT leads to the frame on my 180 using the IIS ignition.  Same setup for the RGS with a Witt?
 
Reggie

Used coils are just that used coils not sure why you would be earthing a HT lead to the frame unless of course you had a dual output coil and was only using one output....this would apply to the RGS unless you were trying to three dual output coils.

Do yourself a favour and get a set of Dyna mini coils well worth the money plus you can run decent HT leads, end result is a nice big fat spark and they are not that hard to fit in place of the originals, .. you can even use the same mounting plate.

Once in Bob's your mothers brother and all that....

 
I have replaced the HT leads in original type cream white coils, its not that difficult, they're only held in with what looks like epoxy resin!

If you piggle off the resin, you can use gentle sustained force pulling on the lead, and it will come out; a bit more piggling of resin and you will see the ht lead 'spike' just replace with new solid copper ht lead and away you go. The first time I did it, I opened up the housing/moulding to take 8mm lead, but I wouldn't do that again, so you need some 7mm HT lead; eBay is your friend!

 
Yeh done all that back in the day I would suggest to anyone who is contemplating doing it to first check the primary and secondary resistance on the coils.........after all they must be what at least 25 years old and believe it or not they dont last forever.
Bloody amazing the difference in spark quality between a new old stock coil and a modern coil like a dyna... even a new Tek coil wont push the spark quality that the Dyna's do.

I have decided life is too short to be pulling cold fouled plugs when all you want to do is go for a ride...after all there are enough other things to go wrong and who needs to be pulling sidecovers/tanks etc.. on a Sunday morning ........then keeping the likes of Vince and Marty from their big breakies... :o
 
"Used coils are just that used coils not sure why you would be earthing a HT lead to the frame unless of course you had a dual output coil and was only using one output....this would apply to the RGS unless you were trying to three dual output coils. "

Someone help me understand this.  If a dual output coil has one  HT earthed to the bike's frame, the coil will still fire the plug with the other HT lead? This seems impossible to me. Doesn't the coil's energy flow via the path of least resistance?  If one HT lead is fixed to the frame, surely that qualifies as least resistance.  There is absolutely no spark plug gap to jump. 
What am I missing here?
 
lawrence said:
What am I missing here?
Click to expand...

on a dual coil as used on a 180 for example, in layman terms, the spark travels down one lead, jumps across the electrode to the plug body, then it travels through the engine, jumps from the body of the 2nd plug to the electrode and then up the spark plug lead and back to the coil, thus completing the circuit
if you wish to use a dual coil with one lead than to complete the circuit the 2nd lead has to be run to earth

clear as mud ?



 
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