It starts up idle rought as if its going to die (sometimes it does) when i get it running i give it a little throttle and it goes it just doesnt have all the power i know it does. I hold throttle halfway and it seems okay i give it full throttle and it bogs down and sputters. please help

Motorcycles - Kymco - XT200Gy3 - 2010 Kymco Super 8 150