Hey, Im new too quads so bare with me. I have a 04 blaster. It was stock when i got it. I Just put full fmf exhaust and twin air filter and took the air lid off. I put a new a 260 main jet in when i did this. I rode it for a half an hour it was running good. Then it just sputtered and died and wouldn't start again. I pulled the plug it had oil on it. So i cleaned it and put it back in. It would start but, won't ideal and if i give gas it will just die. I was wondering if it was a jetting problem? Or could it be something else? Thanks for the info.