I've posted about this, so forgive the repeat.
Yamaha came out with this product in the late 70's when many bikes were found to have cosmoline plugged jets when uncrated. The warranty claim costs to pull and clean the carbs was out of control.
The origonal formula was to be diluted with gasoline then a squeeze bottle or syringe was used to fill the carb thru the regular fuel inlet. After a 12 hour soak, you drained the carbs, flushed with straight gas and no more clogged jets.
The formula was updated to be environmentally friendly by using water instead of gasoline and the soak time was reduced to a few hours. It actually was made better in the second formulation.
If you use gasoline on the current formula, you'll get a milky goop that won't do much.
It can truly be used as a carb dip or soak but if you have simple clogged jets, don't bother pulling the carbs. Just dilute, fill, soak, flush.
In extreme cases, repeat the soak.
This stuff will dissolve the white powder residue, spider webs, spiders, and leave your carb interior clean and shiny.
I've used it for 5-6 years, my retired Yamaha factory trained tech buddy who told me about it has used it since day one.
He works on bikes out of his home shop and buys it by the case.
The flush with gasoline is very important to do generously as the bike will be very hard to start otherwise.
As it is, the bike will buck, snort and pop for a few minutes until all the cleaner is purged.
