Fellas...A club member has for sale a YS F-120...not a FZ or SF...The crankcase just shows "YS F-120". It's used but reasonable clean and with good compression. It had been partially disassembled so I'll probably send it out for a check-over and parts replacement. The model is obviously discontinued and I can't seem to find any info as to when the model was in production, or where I can get an engine manual. Can any of you gents tell me anything about the F-120 engine? Thanks! Jerry