>>Seth found out what might be one of the many problems on this moped. The CDI unit is broken. Are those hard to replace?<<
No, just expensive as hell....mind make very sure that's what the problem is, first - if you are getting weak or intermittent spark however, it's a pretty good bet.
But try replacing the $2 spark plug instead of the $200 CDI unit and see if that helps.
If it does not....then let me know and I will explain how to replace the CDI Unit, with or without a flywheel puller.
As for how to put the throttle cable through the top of the carb, that's not very easy, and you really do have to pull the carb to do it.
Also, if it's a NEW cable, you might have to slide the entire cable out of the sheath and run it backwards through the "72 degree noodle" at the carb top, and then put the sheathing back on, which is a hassle, but often the only way to get the cable into the carb right.
When yer done, the little "ball" end should be where it will be inside the carb when the unit is put together and from there it goes THROUGH the spring, not around it, and clips backwards through the throttle slide.
It's very very difficult to explain, and it really must be shown, how it goes - because until you see it done, it doesn't make any sense to explain it.
Anyone nearby who could show him ??
Lemme know if ya need more help,