Why can't I get a spark?

I have an early 70’s Honda SL125 engine and I’m trying to wire it up so that it can run without the battery. I found this guide http://waynescyclegarage.mysite.com/custom.html and I’ve followed it and done just what it says, but I’m not getting any spark. I used a voltage meter on the stator and there seems to be no issues with that. I also put one wire of the meter on the wire going into the coil and the other on the spark plug and when I use the kick starter it comes up with something on the voltage meter, but despite all that, I still get no spark. What could I be doing wrong?