you can clean the chain on the bike with a brush and and a mild detergent, let dry and re-oil, do not power wash an o-ring chain and use a soft brush the o-rings are to keep in the grease and foreign objects out. to remove the chain the master link clip will slide off in the direction of chain travel (when the link is on top of the swing arm the clip will slide forward make sure it is reassembled that way so branches or rocks do not knock the clip off -closed end of clip is set at forward travel) hxxp://www.dansmc.com/clipdirection.jpg ----behind that clip is a link that slides outwards and then the link is removed here is a pic of the master link disassembled hxxp://www.powerscoots.co.uk/acatalog/CHAIN25link2sm.jpg
NOTE: replace the hxxp w/ http you can also -google- "master link chain" for some more images