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Recognize these Coils?

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
My 78 GS1000 came with these coils on it from when it was converted to a race bike when new. Does anybody recognize these (believe they are Harleys but can't find match)

P1000487.jpg


They are mounted under the SEAT not the tank and have screw in type wire leads.

ANother question...... When I measure the power wire to the coils WITHOUT CONNECTING to coil, they measure extremely close to battery voltage. But when I hook wire to the coil, voltage drops 1.5-2.0 volts. Is this normal? There is also a power line split off from the same power source as the coils and leads to I believe is an igniter (is that correct?). If I undo that wire, there voltage remains at battery voltage even when hooked up to coils. What is all this telling me?

Primary resistance =4.0 Secondary resistance =12K. These measurements are consistent with both coils. I know these are different than stock coils, but will it impact performance.

Care for another question? I also run DYNA S. One of the magnets under the pickups is split in half but remains intact. Will this effect Dyna output to coils?

Sorry if I haven't explained myself so please let me know if you need further info. Thanks for your help.
 
Those look cool!
Are you losing voltage with the spark plugs installed and wired in?
 
The voltage loss is due to the fact that the coils are powered ALL the time.
These systems use "hot" coil loops which are broken to produce the spark - this is also consistent with voltage increase if you disconnect the ignitor.


I think.
Someone better?

-blo
 
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