Hi Liz, I like the feel of this shot. It's a well seen shot, and has things to say.
I assume it's a "grab", when the motorcycle passed through the arch, and therefore there wasn't a whole lot of time for you to prepare. For what it's worth, had you had time to play with, the following might improve the result: Firstly, I think the elements that make up the shot need to be bigger in the frame - I've taken the liberty of attaching a crop for the area I'd have tried to fit into the frame. Of course, this is highly subjective. The bike would be better a bit bigger - just as it passed into the light on the other side of the arch perhaps. As it is currently, the title is needed to draw attention to the bike. The shot would probably have been more effective taken straight in front of the arch rather than off to the side a bit.
Of course, I doubt you had time to worry about any of this. If you were setting up a shot like this, the situation would be different.