K & N Filter Set Up

[quadcrazy]

I have a totally stock 2000 400EX and want to get a K & N filter. Do I need a jet kit or just the main jet? Do I need to adjust the needle? What is the best setup?

[Dune Surfer]

I would rejet.only because it will run lean and that's not good. also it will give you more power and that is good! If you are going to get a pipe you will need to rejet again. At anyrate it is not that hard but you do have to remove the carb. Look for other post on jetting here they will help alot. The size of jet will depend on your elevation.