Hard starting when cold

[chevymotocross]

I've driven many older carb'd cars and trucks. I notice those with oem carb's tend to start and function properly whether warm or below freezing temps. I've used very worn-out plow trucks with oem carbs and they still started just as well in the cold as a fuel injected motor. Concerning after-market carbs, I've put holley 600's on some of the trucks I've had..... I know what I'm doing. The chokes function but the fast idle never seemed to work the way they should on a cold day. This means the engine would fire but you'd have to sit there with your foot on the pedal till it warmed up. That is with adjusting fast idle, they just don't like to function properly in cold cold weather. I drive an 87 now so I don't have to worry about any of that non-sense :-)