does it have a gauge to read the pressure if not you need one. Not any guage too, it needs to be one that can cope with fuel if you dont know what your doing I'm sure there will be a tut if you google it if not take it to a compatent garage, because if you do it wrong and you over fuel to much you'll get bore wash which causes premature engine wear on the cylinders rings and pistons and if you under fuel it will cause high temperatures and melt something and/or detonation.