by okemos » Mon Mar 27, 2006 6:02 pm
The same thing happened to my bike, a Yam TT225, which has a white plastic tank, and my other bikes didn't get that problem, although they all got gas from the same source, and the Yam was the only one with a white tank. I'd get a new tank for a quick fix, or try fixing it yourself for cheap. It's not the fuel lines because a disintegrating line does not send its slough upwards into the tank, but they are prone to disintegrating so should be changed anyway. Since your bike is older, you should replace the fuel line and add a high quality filter in the line. I paid my dealer ($87) to fix my problem. Here's what he did: He washed out the inside of the the tank with soapy water. With the soapy water inside he put in a handful of washers (that won't harm your plastic tank), shook the tank around a lot, dislodging the crud. Do this until the tank appears clean. Remove the petcock and clean it. Rinse your tank well, and blow off the inside with an air hose and let it sit in the sun until it dries. Also, take apart your carb and clean out the crud. Make sure the jets are clean. That's about it. It worked for me. It's something about the white tank and don't ask me why. Sunlight may be the culprit or moisture from humidity. My other bikes have dark plastic tanks and no problems. Go figure. This just happened, so I don't know if this is a longterm fix. Good luck.