Some nice bikes there, i ride also but nothing as nice as that.. i prefer old 90's sports bikes, more character
Agree with JIP to be honest but i know bikes can be difficult to shoot and be interesting.
#1: i think the DOF is too shallow
and it's not centred, looks like a quick snap. Maybe a higher viewpoint looking down on the bike without the helmet would have worked, or not.
#2: Really like this one!
#3: I think the other building at thte right sort of throws it. Maybe having he bike turned 90 degrees and having the repetition of the hangers glass or whatever it is as a backdrop would have been better?
#4: I like this one also but the paddock stand takes a little away from it.. no other way to keep the bike up straight unless you used a rear paddock stand which may have been in view anyway.. i like it all the same.
#5: I like this one also.. think it says what the hangers trying to say with it and these machines can actually fly! lol
All in all i like some but some could have been better composition wise.. but hey i'm no expert and i know bikes are difficult to shoot.