i just changed my spark plug a few days ago since i fouled the other one and today i went riding again with the new one and it would bog out when i went o get on it i rode with the new plug like 4-5 times and im gonna buy another one when i replaced the first one, i cleaned and reoiled the air filter. what else should i do so i dont have to keep buying plugs. also when i was riding today my oil light kept coming on but i have like half of the tank full. what could that mean she i disregard it or what? its an 04 blaster stock