No one is absolutly sure at the moment . ( well we know its not Harley lol) Yes WSB is 1000cc but the engines are limited to stock metal rules ect . Now come 2012 with MotoGP allowing production based engines to go all out with the only restaints being a maximum bore of 81mm . The engineers will be looking on not what the bike can do at a stock level and go from there. Its a case of what engine can you get the MOST horsepower out of AND hold up for the full race distance . The teams being private can use ANY brand . So let the best brand win . No BS, no brand loyalty . Just who is the best period !