fuel (apart from the 100 or so other additives) is made up of :-
a certain percentage of easily combustible material that "starts the fire" and a certain amount of fuel that "sustains the fire" (normally represented as a percentage of N heptane and Iso-octane for testing purposes).
the "super plus/Vpower" is actually LESS easily combustible but MORE sustaining, meaning that you have to "squash" it more to get the benefits from it (you make it more volatile by increasing its temperature by squashing it more).
your bike has a compression level set to utilise normal unleaded, and will NOT benefit (in most cases) from superplus/Vpower....
there are exceptions, for instance, the short stroke/large bores of 1000cc v twins (honda SP1 for example) can benefit from a longer burning fuel, as it then burns completely right to the bore edges (which is a VERY long flame path compaired to a 600cc 4 cylinder!!!....(same revs = same time for both engines to burn the mixture).
you generally wont see any difference on the road tho, youll just be wasting your money, unless you have an engine with an increased compression ratio or excessive boost pressure in turbo engines.
