Rejetting a Franco Morini engine?

[Ray Casci]

Hey people, getting in those first rides? I got my new scooter and things are going good. The jet in the carb is one size to fat. As the engine has been breaking in I can feel it freeing up, but the engine starts four stroking at farther down the throttle. Does anybody kow what they run for a carb and what's a good jet # to get. I know, open it up and look, I was hoping to only open it once.
The scooter is a Hyosung Prima 50 with a Franco Morini engine. That's what I know. Help, if you have been around the insides of one of them engines. Thanks, Ray...

[maddog]

I have a franco engine, went to a 17.5 carb and front pulley, derestricted the pipe, changed the clutch,lite weight clutch bell, opened up the airbox.