i got a blaster off of my father in law. supposed to be bored out to a 260cc and has the oiler removed. i have a mikuni carb with it that i bought a jet kit but the jets don't have the same threads (they are the hex style tho). the air box is cut so it wont even reach the carb. what is my best route carb wise? and what should i do about the air box. blaster does have exhaust too i just can't remember what kind. not familiar with this so any help would be appreciated.