After every ride you should wash your bike and maintain the chain, clutch, brake levers and control cables. Keeping it clean stops the dirt form staining and soiling the platics and metal bits.

You can use a pressure wash or do it by hand, its up to you, but if you do use a pressure wash make sure that you stay at least 12 inches away from lube points like axles, swingarm, and head stems as you can flush out the grease and then everything rusts and needs replacing.

After cleaning you can use a silicon spray to put some of the oils back into the plastics and make everything look clean and new.