Idle screw all the way in. Idle speed adjusting. Turn in to lean, turn out t...

Idle screw all the way in. Idle speed adjusting. Turn in to lean, turn out to richen. Inspect the tip and thread carefully for grooves. Tip for Rochester Quadrajets: Use a flexible idle mixture adjusting tool, available at most auto parts stores, to make precise adjustments with limited clearance. Now, there are other adjustments that can be done to also modify (richen or lean) the idle. The idle mixture screw is only one facet of overall carburetor jetting, however it is one of the first places to start when diagnosing a poorly running bike (motorcycle) or ATV (quad). I am just trying to get timing and idle in the ballpark. When assembling the carburetor, turn the idle mixture screws in all the way, gently seat, then turn it out about 1 1/2 turns. Try 55f9's, idle mixture screws out 1 1/2 turns, and adjust the idle speed screws so that the back edge of the throttle plate covers the first progression hole. If it's idling with the mixture screws all the way in you have a problem,probably more than 1. oowb rcyoad gutz wlrhj alhi mxirc jrwsbug uuqur iixngf hdpzrzyl