We recently went to the Harley Davidson Museum in Milwaukee.  We are not riders but it was still a very interesting place to go.  This is one of about 200 gas tanks they had on display.

I did my best to eliminate as many distractions that could have shown themselves in the image as possible.  It is not a great shot, but it is a clean shot and in a case like this, the simpler the image the better.  

When in doubt, leave it out. Keep your images simple.