I have a 71 cb450 with a blown up motor. There is a guy on cl that has what he claims is a matching motor w 5000 miles on it. He said its been out of the bike for 10 years and that he "pickled" it. I didn't know what that meant so I asked him. Apparently he filled drained the oil then filled the case with transmission fluid. Then he pulled the plugs and filled the heads too. Has anybody heard of this? Is this right? Is the motor still good? If it is, is there a process to get the stuff out, especially the heads? The guy seems to know what he's doing but I thought I should check this out. Thoughts?