It's a Vulcan Riders and Owner Club, internet based organization where every vulcan rider can join. The number is just a member number, which grows every time there is somebody who joins. Sure you can join, check in on www.vroc.com
A forum community dedicated to Kawasaki Motorcycle owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, off-road, touring, street bikes, and more!