Jonas, actually 2 XBR's were imported to Denmark by the Honda importer in '85 and the XBR was kept in the model program until '87. The price was way to high for it to sell, though. One of the two bikes was bought by a Honda dealer himself and he kept and rode it for many years
To buy a new engine, do write an ad in the 'Suche Teile' of the 'Suche/Biete' section.
To learn how to fit a NX650 engine in a a XBR frame, do read the article: Ein britisher Artikel zum Einbau eines Dominatormotors in eine XBR in 'XBR-Media'. Also some of the 600ccs should fit, why not contact some of the tuners in here directly?
To learn more about the XBR, the 'TechnTest', 'XBR-Media' and of course this 'Phorum' is the best source on earth, trust me
Feel free to leave a 'Privatnachricht, if you want to get in contact.
Bluurp. bluurp
Richard Pade, Sorgenfri, DK