all you need os two lines to use a ys 110. here's my setup. the clunk line goes to a filter, through a kwik fueler, and into the engine. my return, from the engine to the tank has a filter, the check valve, a "T" connecter which has a fuel line going off the t for about an inch that i put a plug in so i can take it out to fuel it. continuing to the tank, i have simply a straight line. to fuel, all i do is take out the plug, and fuel it up via the clunk line. pretty simple.