how can i get more throttle reponse out of a 400ex???

kawasakimojaverider · July 23, 2008, 12:49:35 AM

im looking to get some snap out of my bike what kind of mods can i do to make it better?

? thanks

Fox17 · July 23, 2008, 10:29:45 AM

TRX450R.

Team Alba Z400 Rider 43 · July 23, 2008, 10:42:05 AM

I would say put a Keihn FCR 39mm Carb on there.

List the mods that you currently have and I am sure a few of the 400ex guru's will chime in and hook you up.

VForcedave · July 23, 2008, 11:02:14 AM

You can try hooking it to the back of my KFX700. :}}

Fox17 · July 23, 2008, 12:45:02 PM

on a more serious note, a pipe, jet kit, filter, and ignition from moose or someone would help. if you already have those, call ATP and get it ported and polished and high comp piston, new cam, maybe a 440 kit. pipes are different too where they make power. you can look for someone to custom build a low-mid hitting pipe or the HMF Ironman is supposed to deliver a low-mid range hit. but, when yu look at these prices, it might be cheaper and easier to get a 450R.

Team Alba Z400 Rider 43 · July 23, 2008, 01:04:21 PM

^^ I agree, if you haven't gotten to deep into it yet, you might as well part ways with it, and start new with something more powerful.

FoxHondaRider · July 23, 2008, 02:33:41 PM

remove the choke, add the curtis sparks advanced timing key. do those and it will feel like a whole new machine, can you say no more bogging? lol my 400ex runs so good the power is like instant i love it

novadave · July 23, 2008, 07:57:01 PM

ATP racing port job

Fox17 · July 23, 2008, 08:29:14 PM

heck, if you want a dirtbike and can give me some cash ill trade you my 05 CRF450R for it. i need a quad to race on saturday. the ftr bikes race on sunday and i cant go on sunday. the CRF has way more throttle response than youll ever want. its scary fast. i love it but i want a 400EX or a 450R to race.

Cosmo · July 24, 2008, 03:10:58 AM

Quote from: VForcedave on July 23, 2008, 11:02:14 AM
You can try hooking it to the back of my KFX700. :}}

Quoted for truth brother!

billabongcr · July 24, 2008, 07:31:51 AM

if you want quick throttle response, look into a moose cdi ignition mod. its plug in and play (if you dont have other mods that require jetting). my brute 650 did good wheelies before, but after putting my moose cdi on, itll stand up from a dead stop. not only that but it gives you more power all over the powerband. pair that with an exhaust system, jetting and a good air filter..youll be good

mudnuri · July 24, 2008, 02:28:13 PM

Quote from: Fox17 on July 23, 2008, 08:29:14 PM
heck, if you want a dirtbike and can give me some cash ill trade you my 05 CRF450R for it. i need a quad to race on saturday. the ftr bikes race on sunday and i cant go on sunday. the CRF has way more throttle response than youll ever want. its scary fast. i love it but i want a 400EX or a 450R to race.

See if www.benjacobdesigns.com can rent you one. He is offering them (KTM's) up for the FTR races fully prepped with a pit crew for $200!

kawasakimojaverider · July 24, 2008, 10:37:14 PM

Quote from: Fox17 on July 23, 2008, 08:29:14 PM
heck, if you want a dirtbike and can give me some cash ill trade you my 05 CRF450R for it. i need a quad to race on saturday. the ftr bikes race on sunday and i cant go on sunday. the CRF has way more throttle response than youll ever want. its scary fast. i love it but i want a 400EX or a 450R to race.

any pics? how much money are we talking? does it have a title

Fox17 · July 24, 2008, 11:01:18 PM

Quote from: kawasakimojaverider on July 24, 2008, 10:37:14 PM
Quote from: Fox17 on July 23, 2008, 08:29:14 PM
heck, if you want a dirtbike and can give me some cash ill trade you my 05 CRF450R for it. i need a quad to race on saturday. the ftr bikes race on sunday and i cant go on sunday. the CRF has way more throttle response than youll ever want. its scary fast. i love it but i want a 400EX or a 450R to race.
any pics? how much money are we talking? does it have a title

it has a title. idk how much $. what year is yours? mods? title? heres a link to it on here:

http://www.atvflorida.com/forum/index.php/topic,34366.0.html

kawasakimojaverider · July 24, 2008, 11:54:02 PM

mines a 03 i think it has a title i just got it. all it has done to it is itp gncc front tires and itp holeshots xc's or something like that renthal bars procuircet t-4 pipe and its jetted i can send some pics if you want them it has nerfs but they need to be welded on or new brackets i just traded my banshee for it its only been riding about ten times its hole life well thats what the previous owner said anyway

kawasakimojaverider · July 25, 2008, 12:37:03 AM

here she is http://i150.photobucket.com/albums/s95/kawasakimojaverider/DSCN2162.jpg

Fox17 · July 25, 2008, 12:47:07 AM

$1500 and your bike? if you think that that is too much, shoot me a offer.

shogun323 · July 25, 2008, 08:10:57 AM

Quote from: Fox17 on July 23, 2008, 10:29:45 AM
TRX450R.

Aint' that the truth. I have always loved my 400ex until I rodes my buddies stock 450's the other weekend. The difference in power is night and day.

megapurt400 · July 25, 2008, 08:38:53 AM

This is gonna sound way to easy but I did it when I first got my 400EX......ready?...............wait for it..............drop one tooth on the front sprocket. That's it! try it and see what happens.

The 400 comes tuned way out of its league with other 400's . so you have to give a little to get a little. Drop the front sprocket one tooth, increase the diameter of rim and tire in the back by one, get an open header, run a denso plug, open your air box, jet kit, stay with foam filter if you ride in sand a lot, adjust tire pressure, it is the little things you do to the 400EX that makes it a fun ride. Mine personally will not beat my buddies stock KFX400. I can out run a 450r in the long run but stay three lengths behind at take off. I keep up thru the trails though. spend the $17.00 and try it.

Fox17 · July 25, 2008, 10:41:31 AM

Quote from: megapurt400 on July 25, 2008, 08:38:53 AM
This is gonna sound way to easy but I did it when I first got my 400EX......ready?...............wait for it..............drop one tooth on the front sprocket. That's it! try it and see what happens.

The 400 comes tuned way out of its league with other 400's . so you have to give a little to get a little. Drop the front sprocket one tooth, increase the diameter of rim and tire in the back by one, get an open header, run a denso plug, open your air box, jet kit, stay with foam filter if you ride in sand a lot, adjust tire pressure, it is the little things you do to the 400EX that makes it a fun ride. Mine personally will not beat my buddies stock KFX400. I can out run a 450r in the long run but stay three lengths behind at take off. I keep up thru the trails though. spend the $17.00 and try it.

it may come tuned down but its way more reliable than any others. id almost rather have one than a 450R cause of maintenance and reliability. i rode my buddies 400ex the other day and i really miss mine now.

megapurt400 · July 25, 2008, 10:59:17 AM

I really agree with that. That is why I bought all Hondas. Im kinda a die hard for Hondas anyway.

kawasakimojaverider · July 25, 2008, 11:02:23 AM

its for sale fox17= i thought about the trade and cant afford the cash diference that your bike is worth

Fox17 · July 25, 2008, 11:10:55 AM

im a die hard honda guy too. i thought about a yfz but i just couldnt do it.

how much you askin for your bike kawasakimojaverider?

kawasakimojaverider · July 25, 2008, 11:14:49 AM

make offer

megapurt400 · July 25, 2008, 11:18:20 AM

I used to think the YFZ was all that and six bags of potato chips unitl I got a hold of the Suzuki450 with a cherry bomb. Hold on cause yer hair is getting peeled off your forehead! I love that thing. Its just not comfy like the YFZ and the YFZ is way more stable on power slides and jumps I think.