Since I can't ride my real dirt bike due to a broken wrist I made one in Algodoo.
The bike is mine, the rider is Bam826's. I suck at making humans.
IF U UPLOAD IT WITH UR OWN TRACK, GIVE US CREDIT!!!
The rider shifts his weight depending on the bike's angle, the only controls u need are:
up arrow - accelerate (rider also pedals, of course)
down arrow - brake (the bike only has a rear brake since a front brake is useless on dirt jumps!)
EDIT: Reduced the bug on which the lower part of the fork comes off its position, removed the invisible supporting structure and did a slight correction on the rider's lean angle
EDIT 2: Fixed the misplaced spoke and small parts after they somehow went out of their positions for some reason
EDIT 3: Corrected my messup on the layers after EDIT 2
A demo video: