Ok so last week went to go ride and nothing about my blaster felt right thought it just needed to warm up but let it run for a few then took off nothing hard or anything came out of a turn and boom loud back fire and lots if piston chatter. So my top end is gone already looked at the cylinder and it has to be bored out. My question is I'm looking at a 240 big bore kit if I bore it that much will I need a bigger carb?