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I got a pretty rusty tank with my CL175 and use 2 gallons of white vinegar too loosen it up. Waited a while and cycled water and gas through, avoiding flash rust for the most part. I closed the tank up and left it to sit empty while I get the rest of the bike ready. Today I went to check on the tank out of curiosity and the inside was covered in a black sooty stuff. I can wipe off some soot with my finger and it comes off on me, smelling sort of like gas and rust. The odd thing is that the inside of the tank smells sweet? now. Sort of like apple juice. I put it in the closet for about 20 minutes with the cap off and when I opened the door to the closet later, I was hit with this really strong sweet odor. So I have the tank sitting in a more open area now.
I'm wondering, what is the black stuff? I'm guessing I'm going to have to start the tank cleaning process over now..
I'm wondering, what is the black stuff? I'm guessing I'm going to have to start the tank cleaning process over now..