My 1980 BRAT idles at 1400 this seems really high to me and I can not get it to go down (was at 2k when I started but now lowered when giving it full throttle it goes the chokes for a second and goes real hard) by messing with the adjustment screws on the carb and i cant find anywhere that says or shows how to tune a carb (this is my firs carbed car I do not know anything) I am also wondering what the air/fuel ratio should be for this car.