This thread is everything about the bike you've never heard about, the Yamaha XZ550 Vision, the yamaha that almost doesnt exist. I'll start off with an excellent review by a mister Sev Pearman of the Minnesota Motorcycle Monthly: This review just about sums it up. I've got three of these beasties. Two being of the 82 variety, one being of the rarer (and better in my opinion) 83 variety. Not only have these bikes aged VERY well (the full fairinged version oft being confused with a bmw, no offense to bmw riders of course ) theres an absolutely massive information base on the workings of these things. Everything from tire sizes to electronic grafting and modifications. They're very rideable and competent on the highway and in the twisties right out of the box, so to speak. Not quite geared for superslab mega-touring, the vision is however adapted perfectly to numbered us highway, canyon gobbling type performance. Of course they suffer from what all old bikes suffer from, storage! XZ550s are fitted with an extremely sensitive and one-off type of downdraft (automotive style, including butterfly throttle valves) dual mikuni carburators. The best way to fix most vision carburator problems is to ride the shit out of it for a week or so. That being said the only real way to fix running issues is to dip the carbs and clean them out very thoroughly. There doesnt seem to be a work around to this. So next time you see an xz550 on craigslist or in your local paper. Dont hesitate! Snap up a piece of motorcycle history that almost dissapeared.