How about a 1984 600 SL Pantah engine
http://www.bikez.com/bike/index.php?bike=17053 581cc and 57hp, doesn't sound as if the 600SS was a step forward in the engine department
better still 70hp from a 583cc Pantah
http://www.domdummaste.se/ducati/r_pantahs.html And for those that havent read it (Psychlist I hope you have)
some more background info
http://www.moto-one.com.au/performance/600monster.html [Edited on 2-7-2005 by skidlids]