I'm sure some of you out there have already played it.
A friend and I made a big working trials bike, complete with rider.
GigaBike 10,001 cc is the latest and best working version.
search gamertag - Molexendor
Please note, holding down the accelerator causes the bike to spin backwards, not sure why.
So let go of the gas while in the air to keep level.
Forgot to add.
QcChopper made a video of the track.