The RC17 website gives the info you want, however it doesn´t tell you how to get the air in ! You can´t use a garage airline - you´d blow the seals and if you try using a hand or footpump the reservoirs are so small that you loose all the pressure just putting or taking off the valve. Back in the Eighties you could get big syringes for adjusting air suspension - I haven´t seen one for years - I just leave mine alone.