Wow this thread has taken off, thanks for the advice everyone, I've already built the new HT lead. I did go with the higher strand lead, the resistance is very low. With the coil, lead, and plug I choose, I have one bright strong spark.
I put fresh fuel in the motorbike, and the bike started first push of the button. I have tuned the carb, and the bike runs and revs very well now. Very responsive with the TM32 carb, and I have managed to achieve a nice, slow, even idle.