Modifying the stock exaust on a 400 ex

[pr0t0type670]

I was wondering if anyone has removed the three bolts on the stock exaust and pulled the screen out for better performance and louder results? And does it affect backpressure?

[sickmojave]

you get no real performance gains and it sounds like chit :chinese:

[much2fear]

you get no real performance gains and it sounds like chit

Exactly, I can't stand the sound of it without the SA in it.

[2004exrider]

bettr off just saving up for a slip on, might i suggest hmf. they are a very good pipe and at a reasonable price also.

[Pa400exracer]

if you do decide to modify your stock pipe just for s&g's or w/e , remove the end cap and cut off the screen and then cut the other part as far as you can then put the end cap back on

[pr0t0type670]

Im prolly gonna try it without the screen just to see what it sounds like. Can you leave the end cap off? Just so I can put the screen back in if its too loud or doesent sound good.

[sickmojave]

Take a look at this and be sure to check out the cutaway veiws.;)

http://home.earthlink.net/~gellett/exhaust/index.htm

[2004exrider]

you can leave it out, but its really not much louder. make sure to check yor jetting though.

[pr0t0type670]

I have done a couple of rides with the end cap off. it actualy sounds pretty good. Ii assume the jetting is fine being I havent had any problems? If so how do I check it?

Any info would be great and thanks fot the feedback

[vinson581]

any stock exhaust hollowed out shounds like chit, and to boot you look like a idiot running it that way, get a s/o or leave the end cap on!

sorry for being a dick, but its the truth, i think that and so do others, and if you dont know how to read your plug or jet properly, dont pull the s/a it will lean the bike out, and you might have to go up 1 size on the main.

v581

[2004exrider]

well if it sounds good to you thats all that matters. it shouldnt be lean because its still got a lot of backpressure. to check if its lean take your spark plug out, if it is dark grey-light brown perfect, if white lean. if its is lean, there is a 17mm cap on the bottom of your carb take that off, once off get a 6mm socket and remove the jet go 1 upor until it is jetted properly. good luck

[FoxMxRiders]

your better to buy a aftermarket exhaust

[dynofox]

Originally posted by vinson581
any stock exhaust hollowed out shounds like chit, and to boot you look like a idiot running it that way, get a s/o or leave the end cap on!

sorry for being a dick, but its the truth, i think that and so do others, and if you dont know how to read your plug or jet properly, dont pull the s/a it will lean the bike out, and you might have to go up 1 size on the main.

v581

Exactly! Why do you want it louder, so it sounds cool? :rolleyes: