[91mx]

I got a '91 fomula mx with 470 twin question is what screw is the idle screw and what on e is the low speed jet there is a thumb screw on the side of the carbs and a screw on the opposite side by the "mouth" of the carb that you have to adjust with a screw driver. Which is which?

 

[93mach1]

I got a '91 fomula mx with 470 twin question is what screw is the idle screw and what on e is the low speed jet there is a thumb screw on the side of the carbs and a screw on the opposite side by the "mouth" of the carb that you have to adjust with a screw driver. Which is which?[/b]

The thumb screw is your idle, the slotted one is your low speed air mix.

 

[91mx]

thank you I had two different people tell me two different thigs and just wanted to make sure before I screwed something up.