Good points, that's one of the main reasons that the
news forum exists here. It's an automated way to bring in relevant motorcycle topics. Worked very well on some other m/c sites I've run (and if you search for any recent motorcycle news topic, odds are you'll find a top 10 link to the montgomerybikers.com site). It has been much less successful for ninjette.org, so I'm trying to track down some of the reasons for that.
I have some lists of the top searches that bring people to this site, and all of those are in the meta tags to reinforce them, and I do submit new indexed sitemaps to google automatically each day.
Digg, Stumble, FB and other networks are definitely going to be a help as well. BlueTyke was kind enough to set up a FB group for us, which can't hurt with the exposure. It's just irking me that as of this week, we have more original ninja 250-specific content than all but two other sites on the internet, yet we're still only on the 3rd or 4th page of results for generic ninja 250 searches on google.