Why a Motorcycle Wiki?
No offense but why would I use this site over wikipedia.org? Speaking of wikipedia, the VFR800 article on your site has some striking similarities to wikipedia:
Wikipedia is made to be an encylopedia, not a bike reference site. Having a seperate wiki for bikes is quite useful in my opinion as you can make subpages that are reviews (which can be acknowledgely biased). Wikipedia is also quite controlling when it comes to posting images of bikes. Most of my images come from the Honda Motorcycle Identification Guide. They aren't creative works, and hence I'm not worried about copy right infringement with them. I considered adding to wikipedia, but it's quite a bueracratic place and I'm not so much looking for people who want to argue something as simply contribute. We aim to more inclusive than wikipedia. As it stands right now you'd have a hard time finding pictures and brochures of every Japanese motorcycle made, I originally considered simply making a website to meet this goal, but decided a wiki meets the needs better. Mediawiki meets my needs better than anything else, while still allowing other people to contribute. I can run a bot on my wiki to make mass edits (say change every instance of "V4" to a link about V-4 motorcycles), which I can't easily do on wikipedia.
As for plagurism, yes I originally seeded much of the info from wikipedia, I'm not trying to plagiarise in any way but you can freely copy any information from wikipedia as long as you reference them as the source. I have created a template for articles which are from wikipedia
{{Fromwikipedia|title=Honda_VFR800}}
to attribute wikipedia as being the source of the original article. I've added this tag to the article in question.
http://en.wikipedia.org/wiki/Wikipedia:Policies_and_guidelines
Wikipedia is an encyclopedia. Its goals go no further, and material that does not fit this goal must be moved to another Wikimedia project or removed altogether
Other people will inevitably look for a motorcycle wiki in other places than wikipedia, and I aim to accomodate them. Prominent examples of successful topics for community wikis include Star Wars/Star Trek, Transformers, Muppets, game strategy wiki, and one of my main inspirations for this wiki the 350z-tech wiki.
Hopefully that answered some of your questions instead of raising more.