Hey whats up! i have a 2002 honda cr250r with a fmf gnarly pipe and fmf shorty exhaust. i also have a renthal sprocket. I have been riding the bike through trails and fields where there are a few dirt jumps. My problem is i am fouling spark plugs all the time. I let it warm up before i even click it into gear. then im easy on it until im sure its warmed up. I really ride the bike but i dont beat on it or anything. But when i get done riding for the day i park it and the next day it wont start...until i put a new spark plug in...then it fires right up. I was running honda hp2 oil (a quart for every 4 gallons as recomended), but now im running the same oil and amount of oil mixed into 5 gallons. can anyone tell me whats going on and how to fix this problem. thanks for your time!