Hello, I'm new to this forum and just getting back into riding dirt bikes coming from mountain bikes. I just bought a used 2008 YZ450F from a guy. He said that he hasnt ridden it in at least 7 months and the fuel is old. I ordered new decals and brakes for it and got them in today. I got the decals on and had to leave work. I had it in the truck and met my mountain bike buddys for beers and bond fire. At the end of the night I started the bike up and let it warm up. The pipe coming straight off the engine was red and orange in color like it was burning hot. Do i have a bad engine? Effect of old gas and oil? Jetted to lean? What should I do? Thanks so much for your input! Sorry if grammar is bad, Ranger IPA tasted good tonight Thanks again!