400Ex intake air tube

[Sawicky]

The intake air tube(the clear tube) on a 400EX sucks air from underneath your gas tank and seat. I was thinking about cutting it so its pulling air from straight in front..Anyone think this would be a good idea. If you don't understand this question, pop off your seat and follow the clear plastic tube and see where it goes. I was gonna cut it straight off in front...This way, air would be forced into the air box...Sawicky:macho

leave it the way it is..not worth the effort I don't think. You have too much other crap in the way restricting airflow for it to really do anything...;)

If ya want more power remove your aibox lid and rejet again..you'll definitly feel a difference doin this..

[zfire_28]

Originally posted by Rico
If ya want more power remove your aibox lid and rejet again..you'll definitly feel a difference doin this..

yup

[Moto92]

Just take the whole thing off and fill the hole with the cap off a spray paint can. Note this only works if you also run no airbox lid

[AAAirbooorn]

What jet sizes do you use whith just the airbox lidoff?

[ridered86]

depends on other engine mods and your altitude, id try a 155-165 see which one works best.

[400redneck]

I just trimerd mine down alittle..

I just opened up the end under the tankwhere it is rounded in I left the left hand bend because i ride through water :devil and i allso removed all the extra that is inside the airbox it helps alittle but like they said it still has a lot of bends in it :(


no rejet needed:)