its just a cleaned up one,missing the chain guard,fuel tap?,tell tale rust on the rear brake lever return and stop light switch,aswell as rust on various engine mount bolts,it could be a hodge podge of parts put together,all in all it looks good,but way too much money,i doubt any real engine internals have been done,going by the list of parts its just enough to bring it back from a long sleep.and lots of elbow grease and brillo pads.,beware of shiny.click on the 550 model guide and get the frame numbers etc,it might even be a 550 motor in a 500 frame?the speedo could have come from any bike,or wound back,never believe the indicated miles.