On a road user thought.
It seems in Europe , definitely Finland that there is a power rule in play for all modified bikes.
In general if the bike modifications does not exceed a certain % of its original power , then keeping it on the road doesn't hold any real problems (reg/insurance).
Now im thinking this is a smart rule and will it encompass the world?
In any case its an interesting concept because ask your self as a bike owner.
Will i buy a faster bike or will i modify my old bike? (50HP bike)
For 5% increase in performance? (2.5Hp)
7.5% increase in performance?(3.75HP)
12% increase (6HP)
The on paper eye to brain to road vision connection says , yeah for 15% and i could be interested on talking price.
Now taking the idea that "out of the corner performance / off the line drag race" and other hooligan dietary supplements have an increase with minimum 15% HP(i mean noticeable gains on the bike) , but if an increase in torque was added, then i think were talking the same language.