Been doing a little web searching and found that Aprilia is getting these sort of numbers on the Rotax 998 cc engine:
The RSV Mille and limited-edition RSV Mille Factory are high performance V-Twin powered motorcycles made by Aprilia with a 143 HP 998 cc engine built by the Austrian company Rotax.
http://www.apriliausa.com/
139HP:
http://www.apriliausa.com/modelli/ro...nfo.asp?id=116
143HP:
http://www.apriliausa.com/modelli/ro...nfo.asp?id=108
http://www.apriliausa.com/modelli/ro...nfo.asp?id=107
