like i said oldschool but it works----- it is like a steamclean for your motor---- using a fine mist to spray into the intakes---- YES WATER boys and girls------ ppl have been doing this since gasoline engines have been around---- and you can see what comes out of your motor by looking at your exhaust... the first time i did my bike a black cloud came out of my exhaust--- now theres nothing.......... but........ i still use seafoam and other additives---- like fuel system cleaner made by lucus-------- use the water with caution because if you dump large amounts in you could possibly hydralock your motor or even snap a rod