Well, a forum I frequent a lot is this place called Overclock.net and it is a computer enthusiast forum. We have a system where inside the User CP, you can input all components in your computer. You can also put in multiple computers, but for size reasons they let you have only a main 'rig' to display. Rather than asking 'What's your processor' or 'Whats your case', they just see the signature and immediately know whats in the computer.
For more exaples, you can look in here:
Since bikes have the same amount of components really as a custom computer, I think this system would work flawlessly. Both Overclock.net and Bikeforums.net are... phpBB? so you could find out what their system is and add it on to here.
edit: I hope it doesn't really fall under spamming since I have a link to a forum, because bikes don't really have much to do with computers.