This is fun, found an excellent web page on Total Motorcycle with a list of good/ bad/ indifferent bike cleaning, waxing, polishing products and methods.

How do you remove 10 years of grease, dirt and grime? Total Motorcycle recommend Simple Green multi purpose cleaner and Palmolive Original. Simple Green is quite interesting, manufacturer claims it to be a safe alternative to hazardous chemicals and solvents. It is Non-toxic - biodegradable - non-abrasive - non-flammable and water based. Expensive though, 1litre of Simple Green is £9.99.