Honda 400EX XC Racing Upgrade Project Review

[@codycall6513]

I can’t believe I got to talk to this legend engine builder. He’s got my 250R top end and going to hook me up. So stoked

[@ATVonDemand]

Hold on and enjoy!!!

[@classicalcubing7194]

Holy wow. They took the idea of what a 400EX is to a completely new level. That beast is beautifully insane

[@ATVonDemand]

It is a very cool 400EX build for sure!

[@wwcrxww]

I love me a 400ex!

[@Davido50]

Not bad~! Just get a new YFZ450R from dealer your set. Best all around sport/race quad ever made. I love mine! ❤️

[@Davido50]

Not bad If you're a 400EX guy. Get a new YFZ450R an be done w/ it. Your set. Got best sport/race quad ever made ..still available new from Yamaha dealer if you can find one avail.

[@moretrash4you]

David Klimmek 🙄

[@LIFEISETERNAL]

Comparing the LTZ to the EX, I've had several of both, the LTZ's have had a history of problems with the waterpumps and timing chain tensioners failing and destroying your motor, on the 400EX, all you need to do is put on an aftermarket slip on pipe and do a proper rejet and keep clean oil and air filter and ride forever, not to mention a 400EX that is jetted right F'n ripps and is a blast to ride. Newer the better on the EX, they upgraded the Showa suspension in 08 when they restyled the plastic. Another thing worth mentioning is that the 400EX still has the easy to adjust tappet valves where as the LTZ you have to pull the cams for the aggravating shim and bucket style valves, a lot more involved. I'd love to have one of these CT Racing EX's.

[@wyattbaird5020]

I agree with you on the reiablity part, however for most riders buying a 400cc quad wont race it. I understand ATVondemand knows this, but i couldn't say why they made it in 2014 when race 450's are abondant now. Anyway back to my point, these quads (ltz and 400ex) are ment for the trail mainly. I personally have a 2005 ltz and that thing is a monster on the trails. I also love the fact its water cooled, so youe put around on technical trails. The honda seems like it's being branded for the trails but it's an older race bike from the 90's. Both are great bikes, but i personally haven't had any issues with mine. I can see why i would sound biased, but in truth i wanted a 400x originaly, but couldn't find one for a good and condition. Over the long turn tho, I'd have the honda.

[@ATVonDemand]

Wyatt Baird sorry we never responded to you sooner. CT racing and Teixeira Tech built this machine for younger Racers racing in a 400cc based class in cross-country. Sure, a 450 would be faster, but it wouldn't be legal. Plus, there are a lot of writers out there who already have some modifications for their machine and they're looking for other ways to hop it up. When we test machines like this we don't typically expect people to completely duplicate the build. We expect most people to pick and choose the parts that fit their needs best to fill out their own build. Love the LTZ. I did a build on a KFX 400 back in my ATV scene days.

[@forwarddrive4066]

Killshot 50 Cal. Dam, I have an 07 Honda 400ex but it's nothing compared to the quad in this video. Wish someone would help Me do a proper rebuild (top end). I have a brand new jug, piston, rings, spark plug, etc... I work 8-5 Mon-Sat. If I knew what I was "totally" doing I would use my Sundays off to get it done.🤔

[@forwarddrive4066]

ATVonDemand What would be a good place to have my 400ex engine rebuilt? Not looking to bore or go faster, just seeking a pro to freshen up my stock engine. I have a new jug, piston& rings, etc.. in the box to start. Also, how much would a entire set of valves cost? My ex is a 2007 by the way. Thanks. I live in Erie, Pa.

[@shaneschartel9205]

Oh do have a good point, my water pump went and I only got to fix when it was too late. My buddy has a 400ex and I love the thing. But every quad has their ups and downs.

[@petestofcheck9483]

Got this atv for my son for next year move up at GNCC. This atv took first place by four minutes in Schoolboy Sr class at AWRCS series yesterday. 250 hybrids and 450’s had no chance. Thanks to our super awesome mechanic Shawn Stuck for finding this gem for us.

[@swampgumpharpy7977]

You own the quad in this video?

[@snakevale198444]

Personally I'd run a 400ex over a 450.. I'd run the biggest motor kit ct offers and run that exact setup.. Don't get me wrong I like 450s but you will get alot more races out of a built 400ex motor than a 450 motor in my experience. Great presentation and build!!

[@jonnymaas3958]

ya its fun its also built for drag racing

[@cazboynton8217]

I’m 14 and I still run my raptor 250 in gncc

[@screetart1338]

That thing just looks like a monster

[@ATVonDemand]

We have read a lot of magazine project builds since the late 90s when this machine came out. We built one for ourselves 12 or 13 years ago and this is probably the nicest 400 we've seen. Tons of good parts and everything is addressed.

[@screetart1338]

@@ATVonDemand yeah I'm currently trying to find a nice 400 trx for a nice price. Kinda hard to come across.

[@cbr600rrturbo]

It would be awesome if you guys do some throw back reviews of stock sport quads from the past like you did with the atcs that would be sick

[@ATVonDemand]

We would love to but unfortunately the manufacturers can't send discontinued vehicles to us and we don't have the budget to purchase them. Filming other people's machines is not a good idea because if we wipe one out we're responsible for it. We get a ton of requests for vintage machine tests. Perhaps it's time to start our patreon page to help fund the purchase of these old machines for testing.

[@braapsmoke9831]

ATVonDemand you’d be the only patreon I’d sub to.

[@ViceVersaMusik1]

Damn.... I want this Quad!!

[@jessielara6111]

i am 14 and my first atv was a banshee and berly got it last year and now my shee is made to a 430cc banshee

[@fortteen2636]

Jessie Lara lol yeah right

[@johnnyaltomare2422]

I’m 2 and I learned how to ride on a CR500. Now I’ve bored it over to a CR1000

[@braapsmoke9831]

Block_ The_Delinquent what else would you expect a 14 year old to comment lol.

[@Nunya-gk9fr]

Still racing it? Just bought your guys gusset kit, your about the only ones that make a kit for the 400 anymore

[@ATVonDemand]

Ed Teixeira will be glad to know that. Add originally built that ATV for his daughter to race cross-country with in a Northern California series. When she got out of racing he sold it to someone in the midwest to race GNCC with.

[@TeixeiraTech411]

Great to know we can fill a void in the industry.

[@Hectorflores121]

Is there anything that’s stock about this quad other then the cases and tank?

[@ATVonDemand]

LOL, not much.

[@rogerfuller7876]

Honda should take notes of what everyone wanted, at least give the option to put it all on a 450r frame

[@marshalltillotson1882]

Time for a nice 400cc trail bike again too.

[@wonkyscroll5002]

what year plastics did you guys order?

[@petestofcheck9483]

One more thing, ours got the oversized gas tank. No pitting needed. One of a kind tank. I hope the mold was destroyed. Lol.

[@bananadude2374]

Hey Could I take a 400ex 2004 on a track and jump it or would I need to get like new shocks

[@ATVonDemand]

When those machines first hit the market we were amazed how smoothly they got around our local natural terrain motocross track. They're good over small to intermediate sized Bumps and Jumps. If the obstacles aren't too big and you are good at hitting the downside it is pretty capable with stock suspension. There are a few reasonably affordable aftermarket shock upgrades out there if you want to go big. Hope this helps. Please let me know if you have any other questions.

[@danielvinyard4948]

What is the compression (11:1), and will it run pump gas?

[@ATVonDemand]

Call Allen Knowles at CT racing 562 945 2453. Tell him you saw our video and are interested in some detailed information on this motor kit. He will be happy to answer your questions.

[@JaredCochran52]

What year bike is this?

[@SugarMapleForge]

Where can I get the heel guards? they dont have them on their website for a 400ex

[@ATVonDemand]

Call Teixeira Tech. They have them.

[@Ryanbibergall]

Hey guys where can I get those exact plastics and decals I love those

[@TeixeiraTech411]

Ryan Bibergall The plastics are Maier Plastics and the Graphics are from Chaos MX Graphics. You can search Chaos on FaceBook.

[@devonoberholtz6713]

What plastics are those?

[@ATVonDemand]

Maier

[@TwixAirsoft]

What year was the quad in the video?

[@Gavn-nb7vw]

Some one plz respond where did u buy the black wiesco head

[@ATVonDemand]

+Gav3n0023 Sorry it took us so long to get back with you. The head on the machine is stock. It has a Wiesco piston in the cylinder.

[@Gavn-nb7vw]

+ATVonDemand why is the head black then

[@Gavn-nb7vw]

+ATVonDemand the head also says wiesco

[@goyamahago]

They paint it and put a sticker

[@ATVonDemand]

Cedrik Rivière Correct

[@VenegasTrucking]

What front plastics are those?

[@ATVonDemand]

It's been a while since we filmed this test. I 'm pretty sure we covered it in the video didn't we?

[@urinesoakedtroglodyte5764]

They are maier plastics

[@cashflowmikeyy]

@@urinesoakedtroglodyte5764 what year plastics ?

[@ahmondeboxley2950]

Were are you located I would luv to have 250 project

[@ATVonDemand]

We are in the Cincinnati Ohio area. We filmed this out in California.

[@jeffwallace1925]

What kind of oil tank does it have on it ? Dose anyone know?

[@ATVonDemand]

Will find out

[@blayneerwin9276]

@@ATVonDemand would like to know the same thing what tank is that

[@Ryanbibergall]

And does anyone know some alternitives for good 400 ex shocks I can afford elkas or works so anyone other good ones

[@derekmiller2410]

Ryan Bibergall put some trx 450 front shocks on it (there adjustable as well)

[@CrBoy-lh9un]

Or yfz450 shocks

[@mikaeelmontana4364]

What’s plastics are that

[@ATVonDemand]

They're made by Maier

[@mikaeelmontana4364]

ATVonDemand thanks

[@cashflowmikeyy]

@@ATVonDemand what year LTR plastics are they

[@stinknugget14]

where is this filmed ?

[@nsotelo524]

it's filmed at Dove Springs OHV area in california

[@stinknugget14]

okay i thought it was in like johnson valley

[@milesmcculley1854]

how much was total build price ???

[@ATVonDemand]

We haven't added it up, but we can promise you. Its a little steep. Whether you choose to do the entire build or not, there are many great products on this build to help you improve your machine.

[@milesmcculley1854]

ATVonDemand I'm looking at dropping about $3000 into mine but just useing for trail riding I really like your exhust

[@ATVonDemand]

You could pick up the exhaust, skid plates, A-Arms, and a set of Elka's Legacy Series shocks for around 3K. That would be a nice woods ride.

[@ATVonDemand]

This machine was built as a 400cc class racer.

[@wyattbaird5020]

Somethimes these 400's will keep up with a 450 in a race if with a good rider. watch the video bud, that bike had around 45 hp, which is what a trx450 will make STOCK.

[@jamesmoore9408]

I dont get why no desert racers use rzr2 they only use regular rzr

[@DooberD33]

Rode my friends 400 on my birthday while drinking most fun I’ve ever had so now I’m getting one most beautiful bike in my opinion easy to learn easy and cheap to make 100% track ready

[@cashflowmikeyy]

What year LTR plastics ?

[@D33PZ3R0]

Lol and it can all be ur's for just 12 easy payments of $16,000,000 :-)

[@ATVonDemand]

D33PZ3R0 I think most of us would have a hard time completely duplicating this build. What's cool about projects like this is you can simply pick the aftermarket parts that will serve you best.

[@D33PZ3R0]

Oh heh, I was just fooling around.. Love the video! There were just sooo many 'cha-ching' sounds going through my head while watching!! Great info..

[@calebbohan1765]

Can I get this for around $3,000? I’ll even trade my 300 😂

[@jonnymaas3958]

my bike makes 44 and it's got no big bore just some work

[@ATVonDemand]

+jonny maas No big-bore on this machine either. Sounds like they run similarly.

[@jonnymaas3958]

O OK I thought you guys said their was but its a nice bike

[@ATVonDemand]

Thanks John. Also, I noticed that you have a Z400. The Z engine does respond a bit better to performance mods than the 400EX.

[@yofasofa3144]

+ATVonDemand Hey, great video! What is the silver box in front of the engine? I think it is an oil reservoir.

[@zanehopkinson9958]

Ltz 400 would be soo much better

[@ehpersk8]

kfx400 and ltz400 and 400ex are all the same pretty much just different plastics

[@Lalann]

Zachary Freund 400ex's are air cooled the others are liquid.

[@nicholasclark7810]

Zachary Freund thats the ltz kfx and dvx you are thinking of

[@Persistentgaming416]

I'm 14 should I get a 400

[@ATVonDemand]

+Persistent Gaming According to the government and Honda no. However, neither of them would have a problem with you riding a faster 125 two-stroke or 250cc four-stroke dirt bike. Officially our answer is no. That being said, choosing the right ATV is about experience, maturity, and physical size. We cant see a 6 foot tall 14 year old riding a 90 and we wouldn't recommend a 400X/EX for a 4'11" 14 year old who has never ridden an ATV. King of vague, we know.

[@Persistentgaming416]

right now i am about 5,7 and have a 2004 ttr 90 great bike but need to fix the carb but i alos have 3 atvs all of the polaris mine is an etx dad has a 570 and mom has a 400 HO ive ridden them all i also used to have a 1988 kawasaki bayou 220 and have rode a friends arctic cat 400 but i have always wanted to have a sport atv.

[@jimmann8786]

I'm also 14 and have been riding since 2 yrs old you can honestly ride faster than the 400ex on a blaster ( Its only a 200cc) not only that most of the smaller 2 stroke ATVs and ATC are faster than almost all of the 400cc 4 strokes

[@jimmann8786]

My blaster was race ready and bored to 265

[@Persistentgaming416]

thanks ill take it into consideration guys.

[@zanehopkinson9958]

? 400 ex is nothing like a ltz at all

[@ThatRandomMan1]

Y'all didn't do shit to that engine and we know it 😂

[@a.boss.__09]

It looks too slow

[@danielvinyard4948]

Too slow!? it would run 75-85!

[@kjboelter5220]

' 1 .