2008-9 Light Cycle VFX test?

Apologies if this has been covered a lot, but I am looking for a clip that surfaced online in approx 2008 or 2009 claiming to be a VFX test for Tron: Legacy.

It features some excellent and exciting light cycle racing/battle and was possibly most notable for a beginning featuring one of the riders generating the entire cycle from the hand throttle.

I have tried to find it on YT and elsewhere with no success.

Any chance someone here has a link?

Thanks a ton.