have a look on ebay i got a book on the history of the nsr a few weeks ago but its in jap there are some nice pics in it anyway
have a look at this: http://cgi.ebay.com/ebaymotors/Honda-NSR-Motorcycle-JAPAN-BOOK-Motor-Bike-Guide-Manual_W0QQcmdZViewItemQQcategoryZ34237QQitemZ8016235682QQrdZ1QQsspagenameZWD2V