F2 coils... An F2 doesnt use points ignition, but an electronic one. Using those coils with a traditional points ignition from a K2, that could be the cause of some malevolence, si?
Switching to an electronic ignition would cure me of this, Im inclined to think. But I need some more information. Am I off?
Both the Cb550F2 and the CbB750F2 used point ignition from the factory (as well as any K2 in the SOHC4 category). The points system puts power into the coil for 53% of the time while running.
And electronic system such as the Dyna-s, puts power into the coil for 92% of the time during running.
The longer power duration can cause the coil to operate hotter, and heat is generally the enemy of electrical devices, particularly the insulation coating used for wires. When the insulation fails, the wraps of wire short out, reducing function in the coil.
I know that some electronic ignitions operate differently than the Dyna-s. So, whatever you select for points substitution can operate better or worse, depending on the electrical design of the unit. Specifics matter.
If the dyna-s does overheat and damage your stock coils, Dyna can also sell you their own coils to replace them.
The Dyna-s powers both coils constantly with the ignition switch on and the engine not running. However, this should not cause instantaneous destruction of the coils, provided they are supplied by a limit of 12-13 volts from the battery. Do expect both coils to become warm in these conditions. I'd kind of expect the coils to have a shorter useful life, though. But, there are too many variables to make a quantitative estimation.