talkin of gear changes as earlier, the film i reckon that has the most gear changes ever for 1 motorbike is terminator2 when laddo is trying to get away from arnie on his crosser about 150 gears i reckon! 
I noticed that myself.
also noticed it was a Honda XR75 which is a four cycle engine and low and behold here it was making 2 cycle engine sounds. ran right along for a 75cc bike also. lol.
