I think the OLDER 620 Ducati could make the list
To match the larger motor’s needs and up the number of horses that live at the top end of the rev range, the cams now feature more aggressive lift and duration. This all adds up to a claimed 60 horses at 9,500 rpm and 53.3 foot-pounds of torque at 6,750 rpm. This is a solid improvement over the old motor’s figures of 51 horsepower and 50 foot-pounds. And, in addition to the increase in outright power figures, the new motor now revs 1,500 rpm higher than its predecessor, with a rev limit set at 9,500 rpm.
I believe that 51-60 HP is still manageable.