Likely with a big bang. I took a scooter around the block after removing a cat, and it sounded like a shotgun upon decelerating. Removing the air injection and installing a fatter slow and main jet solved it.
It went from about 28mph to over 45mph (indicated) with those changes. Not bad for a 50cc CVT hauling my carcass around.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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