I don't know the precise details of whether they're all 2.8 or 2.9, but I've seen 2.9 ones for sale before.
Bikes may lean the 'right' way, but I'd have been properly hacked off if I'd taken a bike this weekend - the track didn't open for them on Sunday or Monday! With a bit of diesel and a bit of damp I was very happy to lean the wrong way.