Stated power outputs to the 'driving shaft' are:
2003 R = 86.5kW @9250 (2003 Workshop Manual)
2003 F = 92 kW @9250 (2003 Workshop Manual)
2005 R & F = 102kW @9500 (2005 Workshop Manual)
2006 & 2007 R & F = 105kW @10000 (2006 & 2007 Brochures)
All of these are measured to European Standard 95-1-EC, which requires the measurements to be made at the crank and also specifies many other parameters to make normalisation possible.
One of the discrepancies that occurs is that a lot of manufacturers (Aprilia included) list their power output in metric horsepower (PS, CV etc. - which are smaller than imperial (UK) horsepower), so the quoted numbers look bigger. They confuse the matter still further by incorrectly stating them to be 'HP' in print.
1 metric horsepower = 0.736kW
1 imperial horsepower = 0.746kW
So,
2003 R = 86.5kW @9250 = 118PS = 116HP
2003 F = 92 kW @9250 = 125PS = 123HP
2005 R & F = 102kW @9500 = 139PS = 139HP
2006 & 2007 R & F = 105kW @10000 = 143PS = 141HP
Incidentally, the term 'brake' as in 'brake horsepower' is irrelevant, as it only describes the device on which the power was measured.
