Thanks for the suggestions! Is my intake (13mm) the same OD as the 15mm? I'm just thinking maybe I could get a professional to bore it out or fabricate one based on mine. I'll look into the sprocket as well.
Thanks for the kit and timing suggestion too. Is there a reason you say the 70cc kit? Is it preferrable over the 75cc? Is the 50cc kit practically the same as stock?
To you, and everyone else who has offered advice, sorry for all the questions. I'm new to this so there's a lot for me to think about.