Hi, I live in Iceland and I have a TE 450 2004. I have had it for 3 years, and all that time I have had problems with the fuel mixture. The spark plug is always black and black smoke comes from the pipe. I managed to use the bike for the last summers by lowering the pin in the carburetor in the lowest position and took the plastic ring that was under the e splint and but it on top. Then I screwed the mixture screw all in and 1/2 turn out (in stead of 1 3/4). The bike runs now but stalls a lot and burns a lot of fuel (50% more than the other bikes). I already check the valves. All the jets in the carb are like the manual say. I put a new o ring in the acc. pump and noting works.