Steam powered motorbike!

1896 Roper, it required a water top-up every eight miles.

http://www.classicaldrives.com/50226711/steamworks_report_no_3_1896_roper_steamdriven_motorcycle.php
http://thenewcaferacersociety.blogspot.com/2008/06/original-steampunk-1894-roper-steamer.html

the above is a project that is described here http://www.flashbackfab.com/pages/steam01.html