Directly pour one can of FUEL SYSTEM CLEAN in the tank before refueling, regularly, depending on the use (shorten intervals in urban use). The fuel system will be then completely cleaned, from the tank to the combustion chamber. A can of FUEL SYSTEM CLEAN is sufficient for tank capacity up to 60 liters. In case of bigger tank capacity, the recommended mixing ratio is 0.50% (200:1). Do not exceed the recommended proportion. If necessary, proceed to 2 successive treatments. Curative treatment: use the product pure by plugging on the fuel system with the adaptation kit. SECURITY Refer to the MSDS sheet and the information mentioned on the product label.