Odd issue, also it won't start

[jkmthor]

So I had a somewhat minor leak from my headers, but rode it anyway assuming it would not harm anything. I go to leave work, bike starts with ease, I give it gas, and I see (not flames) sparks coming out of the right head. I rode down the street and pulled over right after, the engine felt fine, I did not hear any knocking, and still don't. I can turn over the engine, seems like it wants to start, even fires, but absolutely will not keep running without the starter assisting. I knew the lifters needed adjustment, could it be they are that bad or did I really fuck something up?