If you go with something like a 416 bore and a higher compression piston on a 400ex and you have a machinist that knows what he's doing cut your sleeve out and hone it to 87mm you should be fine, if you or your mechanic know how to put it together and break it in. In my opinion reliability equates to quality craftsmanship. A whole @$$load of wiseco pistons cant be wrong. I would buy a honda and mod it over a suzuki any day of the week. But that's just my opinion.

 

ok so what would be a good setup for a 400ex? a 416, high comp piston, cam, revbox, pipe, filter and jet? mabye change the sproket depending on what i ride?

 

well i reccemend 2005 or newer because of reverse. i bought all my stuff from craigslist if you look enough you can find some reel good deals. i put a slip on exhaust(fmf powercore4), jetting kit(fmf),good set of tires( maxxis razr2's), gear it, 416 big bore kit( no bigger or you'll be rebuildin' it every other ride), stage 2 hotcam. after that you'll be set.

 

so how fast are you? is it pretty quick? how do u do on trails? still fun riding in the wide open?

 

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Bounce400ex
Trailblazer

Posts: 36
Joined: 12/21/2007



If you go with something like a 416 bore and a higher compression piston on a 400ex and you have a machinist that knows what he's doing cut your sleeve out and hone it to 87mm you should be fine, if you or your mechanic know how to put it together and break it in. In my opinion reliability equates to quality craftsmanship. A whole @$$load of wiseco pistons cant be wrong. I would buy a honda and mod it over a suzuki any day of the week. But that's just my opinion.




AMEN!!!!!!

 

when your talking about lid off the air box do u mean this
on my 06 recon 250 there is a black box w/ lid there is a foam filter in it is that wat you guys mean?

and wat does that do

 

i only run my with lid off because of my pipe and jet and filter but if u got a stock filter then i would leave the lid on or drill holes in the lid.. but i can realy tell the difference when my lid is on i went riding last weekend with lid on and it had a different tone on my exhaust and it was over revving a lot and bogging down!!! so i am not gonna do that ne more lol..

 

<div class="FTQUOTE"><begin quote>Originally posted by: trxguy9780

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Bounce400ex

Trailblazer



Posts: 36

Joined: 12/21/2007







If you go with something like a 416 bore and a higher compression piston on a 400ex and you have a machinist that knows what he's doing cut your sleeve out and hone it to 87mm you should be fine, if you or your mechanic know how to put it together and break it in. In my opinion reliability equates to quality craftsmanship. A whole @$$load of wiseco pistons cant be wrong. I would buy a honda and mod it over a suzuki any day of the week. But that's just my opinion.









AMEN!!!!!!</end quote></div>


wat kid of jet will u need?? i think i have stage 1 cuz i got mine already jetted an it has the slip on hmf and KnN so wut should i use with the 416 and hot cam??

 

how much would this all cost? even a ballpark figure would be great lol

 

Take a look here - www.powroll.com

You can shop around several places to price this stuff. Under the tech guru section of this site they offer advice on where to start with jet sizes based on common engine mods with stock carbs.