That kid was riding a CBR-1000-RR, it has about 160 BHP and weighs about 430 lbs. In stock trim it has gone 173 mph, so while it isn't likely he was going 205 mph. With the right tweaking that bike is capable of that kind of speed.
Check the story, Honda RC-51, ~126 BHP. The dyno showed it could only do 160, so he may have been doing ~140.
There is not a 1-to-1 correlation between HP and speed. The curve is exponential, not linear. Even a Hayabusa has trouble getting up into the 190s and that is after modifications. MotoGP bikes make it into the very low 200s but they also have around 240hp.