RE: A starter...
As you said, many of the 49cc engines have to starter, and like mine, that I got from a pocket bike, it has an electric start. Howver, you wouldn't be able to use it on anything like the 26cc's, because it's built in. Problem is, and I may be wrong, but like mine, don't all the FG type engines have a clutch attached? If it didn't you could just add an extension and run a belt to the motor. You can look around, but like I said, most larger engines have built in starters, and stators.....so the battery is a plus.