All the non-profit UK bike and scooter club links that are fit to print.
This motorcycle.org.uk domain is specifically for clubs. That's non-profit, bunch-of-mates, Motorcycle Clubs. The menu will take you to lists of clubs by area, clubs by make, etc.
Parts Suppliers, Motorcycle Dealers, and such will be over on motorcycle.co.uk That's where you will also find lists of cheap motorcycle insurance quotes, Holidays and Adventure Motorcycle Touring, shedloads of other biking links, and other cool stuff.