gear reduction on a 2002 400ex?

Question

I was wondering how much difference this would make and how much I should go . The reason I want to do this is I always ride in deep sand and would like to go to a paddle tire but am afraid I will not have enough power to run them

Answer 1

The 400ex has decent power. Install the paddle tires and check if it has enough, before changing your sprockets (you might not have to).
http://www.powersportrider.com/cgi-bin/zcatjpg
Stock sprockets are 15/38.
Start out inexpensively with a 14 front.
Then add a 40 rear.
Then try the 42 rear.

Answer 2

Low gears,,and flat out is the only way to travell on soft sand.
Just my opinion.