what mods can i do to my 400 2 stroke air box hack it up get a new one? thanx

 

I like the RCR air box mod kit. Helps the engine breath way better.

 

does any one do there own mods to the air box what is with the pipe that goes inside the lid and what filter uni or k&N ?

 

As long as your not going through water that goes up to the tank, then cut a bit of the neck off of the rubber top piece. You can open the area there almost 100% by cutting a little. Inside the airbox the air is forced around the sides of the box. Take a large holesaw and cut 2 to 3 holes in the front side of the box. Also cut out the area where the air enters in to a large oval spot instead of 2 holes and remove the 2 small factory rubber grommets. That will improve flow a lot and keep all the factory usage of it. I run either a Uni filter, or a K&N with a pre filter. Bubba

 

K&N Really brings the 400 2 stroke alive a lil

 

I removed the front wall where you have the two air inlets and then removed the side walls. Really helps out. If you want to go trail riding and are afraid of the water then just put the stock snorkel back on.

 

kool i just picked up a k&n today and a white spring thanx bubba will look in to this and try it

 

What is the "white spring" I keep reading about?

 

for the clutch on the engine i just put my reeds in i will do the spring tommorrow and test on sat cant wait i hope it goes better now