I've seen people doing wheelies on the dirtbike, but can't figure how to do it. It's also really frustrating in CTF when the enemy team have their entire team on your flag spawn picking it up instantly then dashing off to score it. It' probably worst on the map with the river due to the small distances between bases. I'm loving the AA jeeps, such fun and the dumb rocket pods are awesome against tanks.
Same button as sprint, bro. Stick, Jihad Dirt bikes are good, but it's far more effective to sit on the back of one and have a squad mate drive you around while you drop C4 onto/around enemy armour.
It's much better if you're on the back of the dirt bike, of course, you do need friends in order to do this.
Hey guys check out the trailer for the new Battlefield 3 expansion! Battlefield 4: Official 17 Minutes "Fishing in Baku" Gameplay Reveal - YouTube