What are you talking about??? The Pilot jet or the pilot jet adjustment screw? We always run the adjustment screw at 2 maybe 2.125 out from seated position. The adjust ment screw has a tension oring and spring loaded. As for fouling plugs, the pilots basically run the idle circuit and mixes in the off idle to 1/4 throttle. Unless you are running very slow speeds, the plugs should not foul. We change our plugs every year whether they need it or not, basically every 2k miles. I like to change the plugs after fall start up and the fog oil is all cleaned out as well as the Vipers' power valves.