Summary: After playing this for a while, I've come to the conclusion that I agree with other reviewers who said to stick with prior iterations (e.g., SBK aka SBK09) I was initially a bit irked to find that the manual (all except the "music performed by" page) is entirely in French and I just wanted to let everyone know this, since it's not plainly stated anywhere that I've found.
Summary: See my recent review for the new Capcom MotoGP 10/11 game. The SBK game franchise is suffering from the same syndrome. Apparently, these game developers don't understand that new versions of their games should be better than the old versions. The arcade portion of this new SBK X game is ludicrous and unplayable compared to previous versions. The movement of the bikes is totally wrong.