just numbers.. '300' '400' etc.. overall specs incl engine specs are ingredients
in a recipe,, from which an end product results..
change ingredients and 'bread' becomes 'cake', or 'glue', etc..
honda could, create a 250cc 4 cylinder 4 valves/cylinder 11.5:1 cr
45hp @ 14,500rpm 6 speed 143kg sports road bike..
but hang on,, thats honda cbr250rr m22 - of 1990...
28 years ago..
today, eu5 is looming [19mths away] forcing manufacturers
to re-direct development, re-designing engines or drop them,
including use of older designs, for the time being..