Girl and Bikes, quite a difficult combination, if you get the lighting right on the bike, it doesn't look right on the model. I like the other photos, but the pose of the modelis not what I would have done, tends to make her stomach look bigger than she actually is. I prefer the models to stretch and twist.
I did a series for a friend, here the model is an accessory to the Bike. This is the only one I have left on the net. To combat all reflections of lights etc, I had a black curtain in front of the bike, and I shot through a hole in the curtain, so only the white umbrellas or the white paper backdrop and the black curtain was visible in the reflections. Loads of extra effort but I got some nice photos. Nothing worse than seeing the photgrapher and his studio in the reflections. I only messed up two things, that was you can see the of one of the lights in the cam cover - (this was taken in my pre-photoshop days - no touch ups other than crop and the border in Photodeluxe), Getting the model to hold this pose was another, you can see how red in the face she got. The poor model almost needed a chiropractor after the shoot, custom Harleys are not the most comfortable bikes.
I put a thin piece of white paper covered wood under the tire,and pumped the tires up to the maximum tire pressure to get the curve of the tire round. Worked well on the back, but not so well on the front.