Re: Hey Everyone!
Welcome to the forum. 6 motors, wow!
The carbs are the same on the 49cc vs the 70cc (it's not really 80cc like they claim). Basically the carb and exhaust are perfect for the 49cc, but kind of a hindrance on the 70cc.
As for the clutch, a drop of very sticky grease is all that's required for the gears.