Scooter Trader - http://www.scootertrader.com/
Scooter classifieds website featuring wanted and for sale ads. Includes scam alerts, FAQ and advertising info.
Streetfighters - http://www.streetfighters.nl/
Photo galleries featuring streetfighter motorcycles from multiple manufacturers.
SuperBikeForums - http://www.superbikeforums.co.uk/
Online community and marketplace for sportsbike, motorcycle and superbike owners and enthusiasts. Includes discussion forums, classifieds, trackday and event listings, pictures and videos.