If the coil wires are switched, there is a possibility that one cylinder will fire during the intake cycle and ignite the incoming fuel/air back to the carburetor. It depends on which two wires are switched.
The engine will not run but the carb will be damaged while trying to start the bike.
On the coil testing, there appear to be two diodes in series connected between the primary and secondary. The primary side should read 0.06 ohms, but the secondary measurements will vary depending on the voltage applied and the characteristics of the diodes.
The easiest test is to hang a spare spark plug from a coil wire, apply a good ground from the big end of the plug to the chassis, crank the engine and observe the spark.
A fat blue spark shows a good coil. A thin yellow spark shows a weak coil.
If you find a weak coil (or two) check the connections for corrosion and tightness before you buy new coils.
Three weak sparks probably means that the battery is weak or the connections are not good.
Let us know how it goes!
Jim
