Use the Pen Tool for this type of project to select the bike...handlebars, spokes, the works.
Drop in a new background.
Make sure you create effective shadows for the bike. Here, I use a dodging and burning action,
concentrating on the burning option, of course.
Some painting of black color in a new layer at low opacity for shadows too.
Paint With Light on the bike as well as Curves and USM at 40, 80, 0.
Drop in some Suzuki logos with some Layer Styles applied.
Star sparkle brushes for added effect.
Vignette.