The importance of a proper maintenance is well known regarding to hydraulic forks and suspension of the bike: in order to have reliability and high performance it is necessary to maintain the efficiency of the components, in particular to those who work in contact with liquids and fluids .The manufacturers provide for all their product a precise oil change interval that must be respected, like the assembly and disassembly procedures. The new oil contains the standards of the forks performance to which we are accustomed, giving progressive and effective damping action thereof.