When it comes to washing a four-wheeler, everyone has their own special mix of caustic chemicals to get the job done. We love Super Clean. This stuff is available at Wal-Mart and is only about $8 per gallon. This purple liquid is simple to use – just spray on and hose off. A garden sprayer works well with half water and half chemicals. Using the sprayer lets you get the cleaner all up in the tight spots.