Welcome Kymco Owners!
no i didn't make it up its what i read in a book a long long time ago so maybe i remembered wrong but please never site wikipedia as a source
..have you checked / cleaned your air filter?..you may have nothing more wrong than your idle mixture....have you tried adjusting the idle mix screw on the lower left-hand side of your carb?
That's what I thought buddy boy...
That's why we are all here Brother! Taking up the slack for the "dealers"...