Directly pour one can of MOTUL FUEL SYSTEM CLEAN in the gas fuel tank before refueling. The fuel system will be then gradually treated from the tank to the combustion chamber.
One can of MOTUL FUEL SYSTEM CLEAN is sufficient for tank capacity up to 16gal. In case of bigger tank capacity, the recommended mixing ratio is 0.50% (200:1).
Do not exceed the recommended proportion. If necessary, proceed with 2 successive treatments.