Maybe I just don't get it, but I can't win any race except the 1v1s at the start of story mode. One of the reviews (from June) says they think something in the game's engine changed in an update. If that's true then I can blame it on that

it crashes into a wall. hmmm and I have to restart.

Can anyone tell me how to get this one? So far I have beaten the Story Mode, got Gold in all Championships (most of them as Rika) and unlocked all bikes, but I didn´t go for any medals on the other Time Trials and not once did I encounter Rika after a Race....