i went to start by quad this weekend to go riding and to my surprise it wouldnt start. i have around 30 to 40 hours on it and hade no idea why it wouldnt start. i took the plug out and the plug was jet black. after i talked to a buddy i took a wire brush to it and cleaned all the black stuff of it it started after a couple tries. now it starts just fine. what caused it to get black and not start. and will it happen again. ive been thinking about running the njk cr8eix iradium plug whould that help. ohhh and my quad is bone stock still.