Topic: coil install... need help!!

[jvalbuena]

I checked the archives but I'm still not clear on this. I'm installing dyna coils (DC8-1) on my '77 CB750F2. I chose the 5ohm coils because i'm keeping the points and I've heard about charging problems with the "hotter" 3ohm coils. Anyway, the instructions suggest mounting them with the secondary towers (where the plug wires meet the coils) pointing down and back. If I mount them that way, the plug wires touch the valve cover in a number of places. Do I have to worry about any heat or other issues with the wires resting on the valve cover? Also, the instructions say that the primary wires (one blue, one black with white stripe to the coil that fires plugs 1 & 4; one yellow, one black with white stripe to the coil that fires plugs 2 & 3) can be attached to the new coils on either terminal "as they have no polarity." Is that correct? Finally, how the hell do I know which plug wire goes to which plug? I know one coil fires 1 & 4 and the other fires 2 & 3 but does it matter which wire goes to which plug? I hate electrics (mostly because I don't understand them). Pictures of installed dyna coils on a CB750 would be great if anyone has them/can point me to some.

[schmidbc]

Wow, this sounds farmiliar.  No, it does not matter to which coils you plug in the blue wires are which coil you plug the yellow wires.  The coils should be mounted with the coil output for the plug wires pointing towards your front tire.  Just be sure that you pulg the plug wires for cylinders 1-4 into the coil that you've got the blue wire hooked up to, and be sure that you plug the plug wires for 2-3 into the coil you've got the yellow wires plugged into.

I've only got one picture with me today, but I'll try to take more at home this evening.  I'm afraid I don't know how helpful this will be.  Just out of curiosity, did you get the dyna plate too?  I've got the '76 750F and I've upgraded to the Dyna S ignition, the 3ohm coils (Dual output like yours) the dyna coil wires and NKG iridum plugs.  You wouldn't believe how easy this bike starts now! 

[eldar]

I have thought about going to dyna or accel coils but since my bike starts with 1 kick anyways, even when cold, why bother. I will just clean all connections for the ignition and hardwire areas that do not need  the connectors. I still use the points and everything ignition wise is stock.

[schmidbc]

Sorry about the delay on the pics, my internet was out over the weekend courtesy of some heavy storms.

[jvalbuena]

Thanks for all the help. I haven't looked into the problem again yet but I plan to do some work this weekend. I'll let you know what I find out.