I've never been able to get my Boyer equipped bike to start with the battery much below 12 volts. Even with 12.5 volts in the battery, the bike will not cold start with the electric starter. It will whirl over at a high rate but not fire. In this situation , when I give up on the electric starter and use the kick start it starts in half a kick. I've learned that this is typical of Boyer ignition , it requires pretty close to 12volts to make a strong spark.
If the bike has much less than 12 volts in the battery, say 11 volts when tested, then even with just the kickstart(no voltage drop from starter) it will bang and pop but will not start.
Clearly the non-start problem when cold and using the starter is because the electric starter turning over the cold engine causes a large voltage drop which is too much for the Boyer. I think others on this site have discussed the same problem with their Boyer equipped MK111s.
The 2mc capacitor is in the system, but does not seem to help with low voltage starting when Boyer ignition is used.
I am sure that with the original setup the 2mc capacitor was of use; with points and coil the voltage is not so critical, the system will still produce a reasonable spark with much less than full voltage.
This is my theory from observation of my Commando, but really this is a question I have been wanting to ask of others;
Will your Boyer equipped bike kick start from the 2mc starting capacitor with a dead battery or no battery?