With it not just losing one cylinder it seems like it must be something in the kill circuit. That side stand switch is so vulnerable I'd be tempted just to bypass it altogether and see how things go. Not a great answer right when your riding season is the best but it's all I got.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)