I was actually thinking of starting a website like this.
The problem with using the current wiki is that the info will be deleted. The wiki editors are very anal about making sure one topic isn't done in too much in depth. If people started adding long articles about in-depth/obscure bike info, they will most likely get deleted. The wiki editors feel that the site is for all info and that it should be general.
I am not positive this would happen, but most likely. I have tried this with other subjects before and that is what happens.
I am currently moving but will def let people know when I launch the site.