Your asking because you want to own a very special ,light ,hand crafted cycle instead of those horrible mass produced chinese cheap looking things that chavas ride around on robbing old grannies with.
The same reason why you own a very special ,heavy,hand crafted motorcycle
thas the trouble with them std discs..........they go rusty if you dont use them!
don't need to use 'em as much with the 749, being much more flickable that those heavy old 999 barges ! you carry that speed thro' the corners !! Ask Sean Emmett !!! LOL