Early 2011 models running the left over Sachs forks were 48mm. I think they had Sachs front and back in the states. Then the later model 2011 EC250/300 R models, the cervantes and the nambo all had the CC 48mm zokes. The stock models and the six days had the Ohlins 888/Zoke 45mm combo.
Haven't measured my lower clap to confirm the size but I'm sure someone here has and will chime in.