LeBouc
XS400 Enthusiast
Hi all. I am having a problem with the slide of one or both carbs; it does not go back down when I close the throttle and grab the clutch - the engine spins at 3,500 rpm until I stop and let the clutch out in first gear (in rare cases, it will do it by itself). On the bench, both pistons go down when I raise them with my fingers and let them go and they close at the same speed, arriving at the bottom at the same time. My idle is set to 1100 and my pilot screw is set at 1 1/8 turn back from fully closed. I have made sure that all jets and passages are thoroughly cleaned with carb cleaner. Anybody has an idea on where the problem could be? Thanks