A bucket of soap, water and elbow grease
Many people swear by liquid Whisk laundry soap, mixed 3-4 parts water to 1 part soap I think. I haven't tried it myself but they say it's the best.
Various sizes and shapes of brushes help alot to get into the nooks and crannies. I don't recommend spraying the motor when it is hot.
Chain: Chain cleaner
Filter: Filter cleaner
I like to start the quad up after cleaning and bring it up to temp again to help dry it out a bit. Probably not necessary but it's an excuse to ride a bit more I also turn the gas off and run out the carb at this time also, and after it has cooled about 5 min. it's a good time to check the oil before parking it.
HTH, Joe
ATVRiders Janitorial Technician
!!!!!DON'T FEED THE TROLLS!!!!!!