What do I need to know/do to replace my spark plug? I'm not sure how they're sized / what factors to consider so it fits my bike. My bike is a 48cc 2-stroke, but i don't really know specifically which one. The current one has a screw-bit on the top of it, but I think that newer ones have a ball thing, right? That'd be better? I'd probably want to go to autozone / advance auto parts and pick it up. I'll also need a new wire. I know there's a million threads on plugs, but most are like 'which high perfomance plug is higher performance' and now 'plugs for noobs' Thanks!