Hello everyone! Let me begin by saying after reading many posts on here that it's obvious that there is an extensive knowledge base availible! Now, with that being said I need some help and would like to tap into that knowledge. I have an 07 WR 450F that I can't get enough of, but have starting havin issues with it. Had fired it up and was riding normal (no hard-core stuff) on the track and about five minutes into it the bike started to backfiring, popping, mis-firing, and then died. The whole episode lasted a few seconds at the most. It absolutley would not start again so I let it sit for about 10 minutes and it fired right up only to repeat the same thing within a few minutes. Know I'm an old school MX'er from way back when and have had many bikes in the past, but with the technology of todays bikes I do believe this issue is over my head. I did take the spark plug out and it was fine (visually). I have since started it in the garage and again, within a minute it does the same thing. Have also cleaned the air filter and pulled the fuel hose off to verify fuel flow. To date that is all I've done. Any ideas? It's killing me to have one of the meanist bikes around, but not able to ride it! Not to mention the kids having to wait on me!