Quick question on stock coils

Hello all! I just have a question on identifying some coils I have...

I have 2 sets, one set that fits the frame of my 77 kz650 b1 and the other set is slightly larger. I am assuming the larger ones are not correct, but maybe they could work? I dunno, here are the pictures:

Set that fits: (click to see bigger)

Set thats off: (click to see bigger)

They have model numbers off them, but I can't find any information on them.

The set that fits: ZC002-12V
The set thats off: ZC006-TR12V

I also talked to a guy who has the same model bike but its an 81, and his numbers were ZC001-12V

so i dunno, if anyone has information on them and perhaps even the specs, that would be great! or could just let me know if the set that fits will work.

Thanks!

-Dan

You have either points or an IC igniter type ignition. Either will work fine with 3 Ohm (primary resistance) coils. Use a multimeter to measure the resistance on the primary windings... put meter leads on two small lugs where power and ignition wire connect with the meter in lowest Ohms scale. A reading between 3 and 4.5 Ohms indicates the coils would work OK for your application regardless of the mounting issues.