Even those 1000cc bike are not superbike..only Malaysian call them superbike..for Europeans/American its still a sportsbike..

something which is not common ppl can afford, or too powerful to handle... that defines SUPER(bike).

liter bike is an average class, 600 is consider entry level at europe/state.
1300-1600cc is something u see on their road everyday.

in msia.....any bike that is not kapchai or 150cc above = WOW! superbike!

<150cc underbone : kapcai
150cc-400cc  : sportsbike
400-750  : supersport
750-1000>  : superbike

both liter bikes that u mentioned are road legal race bike. under the bones, they are developed for the track & not for the road. one could hardly go above 4th gear on our traffic condition in KL so they r not meant for practical commute.

in msia , no doubt they are superbikes.
in 1st world countries, they are sportsbikes.

zx10r is rm90k-100k IICR, but in HK, it cost only rm50k+, the authorize dealer also throw in freebies like akrapovic slip-on which cost 2k+.
so to them these "superbikes" are not as special or as "super" as in msia.

1300-1600 are mostly chopper/cruiser/touring class. like honda ST, BMWs, Voyager, HD, etc. other than those, some busa & zx14 too.

lets see how they define superbike.

this is a US site, pls look at the tabs on top where the categories are listed out in a row:

http://www.motorcycle-usa.com/

so what do u think now?

yup, pretty much so.

the bike we call "super" are actually their sport bike.