OK... did you CLEAN the points?
If not... read the part about cleaning the points below in the post called "General Troubleshooting and Tune UP Guide".
Do that before you do anything else... a tiny bit of dirt in there will cause NO SPARK.
Next .... let me say that I believe that 90% of the time, somebody buys a coil and it doesn't fix the problem... because the coil wasn't bad.
If you have cleaned the points... then check all the wire connections between the points to the coil.
IF it still doesn't work, take the flywheel off and remove the condensor and test it or buy a new one... condensor.. $3... coil.. $25.
I can't tell you electrical test values for electrical components.. A book from the library will though.