Ok guys so i got a grizzly 450 in a trade, the previous owner said it died in a mud hole. The fourwheeler was definitely covered in some serious mud, I got it super clean. The motor spins over beautifully and sounds like it has plenty of compression. I took the spark plug out, it looked pretty worn out so i wire brushed it and sand papered it. Still no go, so i spray the intake with a bit of brake parts cleaner, still didnt get a hit. Where do you guys think i should go first any common problems?