Free Mods

[2006black450]

hey all. my bud just bought a kfx 400I think its either an 04 or 05 its bone stock! yes horrible I know but i was wondering if there is any free mods for it? like on my 450r i just clipped a wire and got an added 1000 rpms.

thanks

[drzoo2]

Open the air box and rejet. Free, no. 3 dollars is damb close it though.

z

[2006black450]

is that it... oh i tried to remove the spark arrestor IT DON'T COME OUT. tips on how to get it out would be greatly appreciated.
oh and if i remove the air box lid what ji am in Utah)

[05Z400rdr]

On the 06 Z's, im pretty sure that the spark arrestor is tac welded on. I could take it out on my 05 that I used to have, but when we tried to on my dad's 06, it was rtac welded from factory.


Landon

[soberagain150]

Originally posted by 2006black450
is that it... oh i tried to remove the spark arrestor IT DON'T COME OUT. tips on how to get it out would be greatly appreciated.
oh and if i remove the air box lid what ji am in Utah)

best tip would be to buy an exhaust...

[R3b3lx]

i took a 2" holesaw and cut the sparky out. if you have holesaws...just use one that fits snug inside the chrome end cap outlet and whallah..sparky gone. it sounds better to remove the entire endcap...but looks like crap

[drzoo2]

Why remove the spark arrester? How much restriction can it be. Some places require it. I ride in a national forest and they do. I had to buy one for my FMF

z

[R3b3lx]

believe it or not, the sparky is a big restriction. i ride state parks here, and theyve never chacked or asked about having one.

[kfxracer]

Like the other guys said, take off your air box and go to your local atv shop and get a few jets to test out for the best setting. Also, the actual spark arrestor is welded in, but the tip just comes off with 3 allen screws. I toke mine out, cut off the spark arrestor with a hand saw, took off my air lid, and rejetted. I saw a noticeable diiference in low-end power. Taking off your air lid does add low end power!