PM about the gas tank?
My first reaction is to jump on the s90, get it for less with the ailing engine and save the owner some hassle. But I just have too much to rebuild for a long while and the CL70 in the garage is waiting for some love. I wouldn't mind having a Honda CL175 either. A friend of mine scored a mint one of those and it's pretty quick: something that I could justify having insurance and registration on.