carb polish

[6858-400ex]

is there any place i could polish inside the carb to gain any more power

[USAF Dirtboy]

correct me if im wrong, but you want some kind of "rough" surface in the intake port..this is because you want the fuel/air mixture to "tumble" around to get a proper mixture or something of that nature. Ive never heard of carb polishing, and therefore i presume that the same concept still has relevence here;)

[04'400ex'er]

You can remove the choke for a little crisper throttle response.

[hrc]

How does removing the choke give you more throttle response? How much more does it give you?

[400exstud]

It makes the path for the airflow more smooth. It doesn't add much hp, just throttle response. Keep in mide that you don't have a choke though.

[04'400ex'er]

In most occations you wont need a choke if you pump the throttle enough to get the accelerator pump goin ok.

Here is a link to the step by step process with pics of how to remove your choke. http://www.atvriders.com/articles/choke400ex.html

[brad_400ex]

I removed the choke on my 400ex. I could notice an increase in throttle response, however, i live in nebraska and on cold days it is a little harder to start, but i think it is worth it.