I finally have a working moped! It's been great and I'm working on making it look purty, but when I ride it there's something that seems to be off.
I can get it up to around 45mph (it's got a 70cc head), but after a few minutes it refuses to keep the speed and slows down over the next minute; after that, I struggle to keep it above 15mph. However, after a few minutes, it suddenly accelerates back up to like 40mph with no problem.
I have no idea what is causing this. Is it overheating?
Thanks for the advice guys.