high idle carb. help

i have a carb motor, it idle at 3000rpm i hook the gas petal back to stop it(it drop below 1000 rmp). is this a good way of stopping it or bad? My brother say it a bad way to stop it because it should stop the high rmp itself.
I thing the cable need oil.:pimp: What should i do?

go to carb section. try not to post it too many times or people won't reply