It may be worth checking your ignition coil too if you have no spark. They are often the issue. Mine recently died on my 1956 villiers mk2 midget and there are a rew good videos on how to test and replace them. I avoided the cheaper taiwan replacement and got a uk made one from villiers spares but they are expensive. Hopefully i will get another 50yrs out of it now.
This video is pretty good.
Let me know if you need any other help with the villiers.
