1999 Honda TRX 400EX ATV Build
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- Опубликовано: 6 окт 2024
- Honda TRX 400EX ATV Build:
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In 1999, Honda changed the game and broke the drought of sport ATV's when they released the legendary TRX 400EX. While most machines need a couple years to iron out the flaws, Honda and the rest of the world knew they had a winner in this quad after it not only conquered the Baja 1000, but won. Since then this quad hasn't had any major changes except for an added reverse gear and body redesign in 2005 and again in 2008. With so many of these machines out there you have a ton of options in the aftermarket and in this video we show you everything that we added to this machine to give you some of the ideas of what you can do to your TRX 400EX to really make it your own.
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#hondatrx400ex #trx400exbuild #atvbuild
Just picked up an 03 for a few hundred dollars that definitely needs some love. This build is super inspiring!!!
Suspension is super important on a 400ex if you want to go fast because of the lack of power. If you have a suspension that can soak up the bumps it allows you to keep it pinned more often instead of letting off and struggling to get back up to speed. I personally ran Lonestar long travel a-arma with elke stage 4 shocks front and back with a Lonestar rear axle. Its been a good while since I had mine so I dont even know what is available. CT Racing 426 kit with stage 1 cam and the older 450r fcr carb was an amazing combination with the suspension because you had the power of a LIGHTLY modded 450, and if you had your whits about you then you could run them down on an XC race. Like I said, suspension is still key so you can crash through the rough stuff and spend less time trying to accelerate because the 450's will definitely do that better. Do those mods with a good steering stablizer, nerf bars or at least heel guards, and frame, a arm, and swing arm protection and you can be a very competitive racer. Oil cooling is another important thing to think about, and I also ran aluminum scoops to funnle more air to the engine because its air cooled. As far as intakes and exhause I ran a white bros exhaust and I experimented with various foam filters and had good success. Tires I liked the Maxxis gncc tires and to save a little cash I ran reinforced rims in the back and bead locks up front with tireballs in front and rear to prevent flats. It was a great machine, not the most powerful, but very competitive and lots of fun for all levels of racers/riders. In all I did have about $10,000 in the machin, which included $2,800 for the cost of buying the machine itself. Maybe I should have gotten a 450, but either way I had a good time and that is what is most important at the end of the day.
Oh this takes me back. I bought one of the yellow 2001 models when they were first released in the summer of 2000. I rode that thing all the time, loved it. Then in 2012 some jackass decided they needed more than I did.
TwoAMBlacktop that sucks goddamn
I also bought a brand new yellow one in 2001. I rode that thing DAILY for 13 years. Thousands of pavement miles too. I never did a thing but change the oil, brakes, and tires. Absolute bulletproof. Best machine I ever had. When I sold it after 13 years it was smoking just a little bit and prob needed a top end. I could almost shed a tear thinking about watching it go. I’d like to find it and have it back
Also I dunno why people underestimate the speed?? I dunno if something changed after but my 2001 would do 76mph with me on it at 200 pounds. Radar checked by state trooper 😂 ( and gps). Maybe they lowered the gears after 01 I dunno. Mine was factory stock accept a white bro’s slip on pipe
JohnnyRebKy yeah, they built a lightweight fun tank of a machine.
Shame. I had an 08 I bought off the showroom floor and got stolen a few months later. I know how it feels.
@@JohnnyRebKy Hey man that's great to hear about the longevity of your quad. I bought a 2008 400 EX (in white ) in March of 2011. Everybody wanted the new 450 R and the 400's were just sitting on the showroom floors and the price was getting lower and lower and I finally pulled the trigger on it before it got sold out from under me. I'm a dirt bike guy but have always wanted a quad and I knew I made the right decision. I actually prefer the 400 over the 450 R because it's so bullet proof and maintenance free. It's got plenty of power as far as I'm concerned. I always rode 2 strokes back in the day (I still do) but I always had respect for the Honda XR's and the 400 EX has the same engine as the XR 400. I'm leaving it stock too. I've only added 450 R front shocks (really nice upgrade) a Rox dash plate, handle bar risers, and the poly shock covers that keep the dirt out. Couldn't be happier. My stock battery just died over the weekend. I can't believe that it's lasted 12 plus years. I'm never getting rid of that thing. Thanks for posting that. It only confirms I made the right decision and bought the right quad.
im currently in the process of fixing up my old honda 300 ex, it sat for the past ten years ive i had it since i was ten now im 30 lolz i was rough on it but i got the electrical issues fixed as well as the piston chamaber honed. this guide has helped me figure out what too look at for giving it a fresh start again so i thank you.
great bike
Bought mine in November 98 and I’ve still got it
That's awesome! Is it still running great for you? - Josh
Dang definitely hold onto it so in 30 years you can show the title and say you bought it 50 years ago
You guys should do a build on a Honda TRX250R
My first quad was a new 99 400ex in late ‘98. I had no complaints. Couldn’t hang with my buddies on the banshees in a drag race, but it out performed them in everything else.
them banshee’s are fast as shit 🤣me and my buddy got up to 76 mph downhill and it started to drift back and forth needless to say that was the last time we went that fast on it
I have built many many of these machines... the best for motor setup I have ever seen is a 426 kit 11.1 (93 gas) stage 1 cam 450r carb with a full exhaust and uni filter and upgraded oil cooler and fins.. it will run with a stockish 450s
I ran a 416 for years and it would eat 440s alive. I raced it through the hybrid years into the days of the 450s. It was always competitive. Eventually the engine was yanked out for a Yamaha 450 bike engine. In my mind the 400ex chassis is still the best ever built.
Exact set up I have. The 450 carb really turned the bike into a different animal!
How to put rings in
Need to no how to put rings in
Just bought a 03 400ex the other day, Full pro armor nerfs, pro armor front bumper, Razr tires all around, K&n air filter, the only thing is that it hasnt been used a lot in the past year so it has a hard time starting up but once its warm it runs very good
Probably just needs a carb clean
Carb that's it then it will be a turn key honda. They're the best
Get a case saver for ANY sport quad. Its best $20 you might ever spend on your machine! Have em on both my newer Yamaha quads. Alba racinh makes a nice machined alum piece in various colors.
I’m only 10 yrs old and my dad and I are looking to get me from a 250cc 4 stroke to a 400cc 4 stroke thanks for making this vid🙂
The 250 would be fine. They used to make a 300 back in the day, like late 90's. I rode one once and it had enough power and I weighed like 185 lbs back then. But if you buy a 400 EX you will not be disappointed and will have it for a long long time whereas you might grow out of a 250. If you get a 400 and decide you don't want it anymore you will be able to sell it no problem. There are tons of after market parts for the 400 too so you can do whatever you want to it, or leave it stock like me. Good luck with whatever you decide.
Had an 03 300ex. Beat the hell out of it and it was a beast. Ultimately cracked the crank case and parted ways. Now got a 03 cr250
Nice! We're working on a CR250 build right now, so make sure to stay tuned for that for some ideas on yours! - Josh
The best trail quad of all time
5:00 RIP shifter
loved the razor 2's on my 07 trx450er. but sold it and bought a new 2019 rancher ES. kinda miss it
I have a 2002 Honda 400ex with a stage 2 hot cam with a 440 big bore kit and it’s runs lean and mean!!
You should do an xr400r enduro build next!
That would be sweet for sure! We'll have to see if we can get our hands on one. What style of build would you like to see? More ADV style? or enduro? - Josh
Iv got one. I’m actually going to be getting rid of it. I bought a used gasgas 250 2 stroke to replace it.
Rocky Mountain ATV MC
ENDURO would be awesome, looking into doing up mine and would love to see what you guys have to say.
Thanks for the response.
Did you guys have to over haul the carb?Mines been sitting for years and I wondered if I would need to rehab or even replace it.
@@bradfordstoll5191 yes! Get it “jetted”
You guys should do a TRX700XX build!
That would be sweet! Those things are pretty hard to find! I wish they would've kept producing the TRX700. We'll definitely see if we can get our hands on one! - Josh
Rocky Mountain ATV MC there are a few in Franklin Tennessee. Not that rare out here.
Y’all wanna do a giveaway with this atv?😂
They should
Harrison Crick yes
More build segments pls! Great stuff.
Still the best all around quad after all these years
Lol nah trx450 is better fs
@@LolliWANG505 not on the trail
My buddies got Kawasaki's , raptor's 660 but ain't none of them tuffer than my 07 400 honda TRX💪💪💪💪💪💪💪💪 . When i say tuff i mean tuff.
Kmsl 😂😂😂 shit 1 Buddy can't get his raptor to run for a day
Tell him to bring it to Da' Camp
this came out at the right time cus' i just upgraded to an 01 400ex from a trx250 ex and am learning the clutch. but the previous owners rode in sand and took off some skid plates and owned a atv repair shop so it has some cool stuff on it
I went from a 2006 250ex to a 2004 400ex and I love the shit out of them both, bulletproof
@@jnewlander9483 oh yeah the 400 is gone now I just traded it for a atc250r and I am selling that because I am building a 86 trx250r
Next up is to try and find a trx250r I always wanted one of them
Great build! Next trx300ex, trx450r & trx250r
I've got a 2004 TRX400EX sports 05 model.
Got a 2003 400ex with moose racing cdi box airbox delete with k&n filter dmc alien slip on and weisco high compression piston I run 100 octane gas best quad i ever owned and more reliable then my yfz 450
when can you guys make a yamaha raptor 660 top end rebuild ??
Kanie Yoshiki Yamaha sucks
@@Brensta18 so ? I dont give a damm if yamaha never worked out for you than there's nothing I can do for ya
The 400 ex with the double light like that has always been my dream quad that or a raptor 700
It's definitely an iconic look! We were pretty lucky to get this 99 is such good condition! - Josh
Rocky Mountain ATV MC nice I’m looking at an 02 model right now in great condition
@@larrybanks2403 ive got a 99 model .. with a lot of nice upgrades Dont want to sell , but could use the $$ in east NC
@@rmatvmc i jus bought an 2002 im getting rebuilt i kno nothing about the parts i jus kno how to ride but this on here is how i want mines to look when im all done with it nice tips my man
Got mines since 99 and never had a problem with it,I hear all these guys with their 450’s always in the shop lol I’m glad I didn’t get one of those lol
I bought a brand new 450r in 07. It had all kinds of recalls. It never ran right from the moment it came of the trailer. I gave it back after three years and devoted my self to the all mighty trx250r🤩👍🏻💨💨
There's a lot more general maintenance on the 450r, but its so easy to work on. My buddies have 400's and I think I spend more time working on theirs because of the mentality that they're so reliable, that they just run them till something breaks. And it's usually not an easy fix..... I spend a few hours after each day out at tracks or trails going over my R and haven't had any big problems that I couldn't fix. And the look on my friends faces when I let them ride it, or the disappointment when they can't keep up is well worth the time I spend with her as I mod and fine tune or just maintenance.
@@awizzle727 I'm not bagging on the 450 I just had one bad experience after another.
PLEASE do a stock or close to stock TRX250R Review then a build series you'll get alot of views
The footy in this video is sick but I own a 2000 Honda 400 ex and its a beast
Thanks, Michael. Glad you like the shots. Have you don't anything to yours?
@@rmatvmc nothing yet but soon haha
Had a 440ex with some aftermarket shocks and other various mods.. loved it. Definitely reliable and a great quad.
One of my favorite quad of all time 400ex best
Crazy how this one the Baja 1000 out of all of the other machines out there
Won
400ex the little brother to the Legendary Trx250r🤑
Can you guys do an ltr build?? And then maybe a comparison to newer machines haha
I got a 2 stage cam and a bored out carburetor and it’s got a lot of power
DAMN Do more vids about 400EX ! We love that !
Glad you like it! We should have more ATV vids coming down the pipe soon. Thanks for watching.
I've never owned a quad. and even I know the first thing you do to a 400ex is throw those front shocks in the trash and at bare minimum buy stock 450 shocks with resivors
We call them pogo sticks😂🙄
Yeah that's definitely a great performance upgrade for these! The owner of this 400EX didn't care to change up the suspension for this machine since he mostly rides slower mountain trails. That would definitely be one of the next things we'd go after to take this quad to the next level. Thanks for the input! - Josh
TRX450r front shocks are too stiff on the 400 unless you are a Big guy (200+ lbs) . Front Resivor shocks from a Kawasaki 400 or 450 ( 2008+ ) work great with out re valving them and Yamaha YFZ 450R front shocks work well .. ( they require some mild grinding to narrow the upper mount like the TRX450 ones .. and need to be old enough that they are not too tall I think the change happened in 2013/2014 ?? but am not 100% sure .. ( i currently have fox podiums all around pulled from a Polaris Predator along with custom mounting brackets and +2" houser arms.. Another nice mod is braded brake lines in the front and a pair of dual piston front calipers they fit direct from the 450r or all the other major competitors Yamaha , Kawasaki , Suzuki ..
Randy You're stupid. We are here to educate others not tell them how to be stupid and throw away front suspension.
Trust me if you took one ride on a stock 400 EX swapping out the front shocks is a no-brainer. I referred to them as pogo sticks too. If you get on the gas and hit any bumps your knees just smack the gas tank. I bought used 450 R shocks and have them on the softest settings but I am right around 200 pounds. I've heard that the Yamaha YFZ 450 shocks are the best ones to use but I got a good deal on my 450 R's on ebay. I didn't even try to sell my stock 400 EX shocks on ebay because who would want them?
You guys should do one of these videos for the 2018 honda trx250x
it is sporting the Sideways Utility type engine .. they are quite torquey .. by the engine design and are also simple to replace the topend on .. if ever needed .. they are quite reliable .. the best advice i can give is to annually or by annually .. check the rear differential fluid .. and if you like to get muddy .. make sure the small hose running from the rear differential to the air box .. is connected and intact.. ( im sure these are fine now .. but eventually the rubber line will get brittle and if it is off and you go in deep water,, the water will enter through the vent hole and the diff lube will float out on top . . a new differential is quite pricey 500 or more .. if 10 years from now the worst happens .. rebuild the differential before the axle play gets crazy and .. it can be a inexpensive fix .. bearing and seal kits are under 100.. .. lots of folks ride until the quad will not .. by then the diff housing is garbage.
Super nice EX ... actually want to build one to look exactly like that one ... Everything added fits n looks great together .. 💯💯💯🔥🔥🔥
You won’t be sorry we have had our 400s for over 20 years and they still run strong
@@riverjames1020 man I had a 2003 honda 400ex and blowed it up twice n so I got tired of having to rebuild it so I sold it ... Well I didn't rebuild it the shop I bought it from rebuilt it so I wonder how good of a job they even done on it all I know is both times it started smoking blue smoke out the pipe like crazy and was using oil so all I know is it just wouldn't hold up aguess I was to rough on it... It was needing rebuilt as often as a two stroke
@@miller2167 lol ya one of ours was totaled 6 times and rebuilt once
@@riverjames1020 totaled 6 times?? 🤨🤨🤨 Sounds a little stretchy the truth ther river james... Say u had it for 20 yrs n still runs strong then u say u totaled it 6 times hahaha n rebuilt once . 🤔 ... Well I herd that man lol
@@miller2167 ya well I didn’t say it was cheap lol
That's a minty fresh 99 400ex you got there...
Bought one brand new back in 2002. Some viewers weren’t even born...makes me feel old!! Lol
I have 2 of these quads. Love em there amazing fun
Yes they are!
I had one of the first ones my dealer got in. loved that bike.
Sick ride..I had a 2000 yellow 400ex with a twist throttle, nerfed bars and a wp clutch 450 carrier housing thing was a beasttt!
That sounds like a sweet machine! What are you riding now? - Josh
@@rmatvmc yes it was never let me down.. I have a 2014 foreman 500 fuel injection lifted with MOTO MTC 28 inch tires and hmf slipon
I have a 99 Honda 400ex runs great but I need to go through the motor
The one extra thing i would add is a motion pro race throttle it replaces the thumb throttle with a dirtbike style
Best looking quad
A friend of mine had a similar year, a 2000 I think. The only thing I didn't like how high you sat in the seat. I had a yamaha warrior. You sat lower on it. Maybe I was just used to my quad. The 400EX frigging ripped tho
Love my 2003 400ex
I had a 1999 400ex bored to a 440 years ago .. it was a good very good trail bike
They really are a dynamite machine. I've never had the chance to ride one with a 440 installed. Did it open up the power pretty good? - Josh
@@rmatvmc absolutely .. it really gave it the bottom end torque it was missing
To bad Honda doesn’t make the 400 or the 450R any more. Those where great sport ATV’s. My brother has TRX 450R that’s excellent atv. Honda’s parts and service Lasts forever so any one who owns one. Will be able to enjoy it forever.
Good job, she's a beauty.
70 bucks for a top end? no way a blaster top end is even more expensive
Yea seems so! Anyways, keep ur machine fresh an always running well. I buy those pre oiled air filters from maxima an twin air. Awesome. Motosport.com has better prices ;)
400ex lives onnnnnnn...love mine
Most reliable quad you can get that has enough power to have fun (after a couple mods)
It really is. A lot of these older air cooled quads are crazy reliable as long as you keep up on the maintenance. The TRX400 is the perfect combination of fun and power for most people! - Josh
@@rmatvmc I couldnt say it any better myself sir👍
Love the video. I have a 2001 with full FMF everything. How much did all your parts cost? Mine too is from the snow belt.
Awesome vid and edits and filming and bike
Can you make a build video with a 2004 Ltz 400 if you get one
Should do trx450r front shocks
416 big bore and a cam. More mid range and top end. Not the 440. 440 heads leak oil and it's a low end build. Big gun full exhaust, open air box. Larger oil tank. Roll design Lobo 2 a arms. Rpm axle. Roll design swing arm +1 . Roll steering stem. Set of elka shocks. Renthal fat bars Omf scallop bead lock wheels 8 inch rear 10 front. Maxxis rzr tires or itp holeshots. Braided brake lines. Ac propeg nerf bars. Ac bumper. And a set of plastic skid plates. The aluminum gouges and gets caught up more than the plastic. Stainless swing arm bolt. Stainless tie rods from ricky stator, they wont bend. And oury waffle grips. Gusset the frame behind the upper front shock mounts, the top of the bar that runs down to the bumper, and the joint on each side of the oil tank, and the brace above the head under the fuel tank. That is a solid build that wont fail to finish any race unless you do something really stupid. It finished the baja 1000 after 4 years of gncc racing and 4 years of hard motocross racing. It was competitive until I stopped racing in 2010.
Best simplest most fun cheapest quard to own...
The quad looks awesome
I still remember when this and the Yamaha warrior were the fastest sport quads on the market
You must have forgot about the banshee since it was produced every year the warrior was
I need that engine for my xr400 😃
In 1999 two of my buddies and I walked into a dealership and tried to buy three of them. “Metro Motorsports” wouldn’t discount them not even one dollar. We walked out...
Freakin legend of a quad
I’ve still got mine I bought new in November of 98
God bless spread his word!
Digging the quad build videos
How many decibels is the Lexx exhaust with the trail tip
Can you tell us what the total cost of the build was? Not including labor time. Just parts?
imacenurface I second this ^
I have added many parts over the years, all with performance, handling and durability in mind! And to see the care and effort that went into this build, cheers to you RMATV! Is there a ball part price or parts list ?
Come on man tell us the build
Cost
What are the best years to look for and which are best to avoid?
Great Video!
I have a 2014 model 400x and thinking about putting some aftermarket fat bars on, where would you recommend moving the Key and reverse and neutral lights too ?
they make alloy brackets that bolt to the bars , or you can drill a few holes and mount them in the plastics
I LOVE my 400EX!!!
What have you done to yours?? - Josh
@@rmatvmc Hyper wheels (Front -1" offset) , Elka recreational shocks, Houser +1 A-arms, Elka stage3 steering damper, Custom battery/airbox, Hotcams cam shaft, 416 big borekit, Hotrods crank, full WB exhaust, HID headlight, Magura hydraulic clutch lever, Holeshot GNCC tires and finally my own custom engineered adjustable travel (progression) swing-arm linkage (that I hope to bring to market soon) facebook.com/3rdaxisracing/. Just need to pick a youtuber to endorse it....
Thanks for this video
Ure Jam nut on Ure axle nut should be against the axle nut.
What are the specs on the front and rear wheels and tires?
The stage one cam gives low to mid range power btw not high range
I have one to it’s race ready
Project raptor 700 next
What are the specs on the wheels and tires? Thanks! Dope video
Do a warrior 350 video
KingBiggie 88224 nasty
I love the 400 ex but the front shocks are horrible
Nice looking build! :)
Yaya!
Im building my 2000 trx 400 ex and i will like to know the prices an how much money did you spend, can you do a listing
I got the same one but yellow I wanted to ask can you change a twist throttle to a thumb throttle?
What spacers did you guys use in the front and how wide is the back looking to make mine wider
Are 400s good beginner bikes ?
How is a 2002 400/440 ex with stage 2 hot cams
Have a 99 model, wondering where you got those a-arm guards?
Should add a link to a complete build list
There is a link to all the parts we used in the description and at the end of the video.
You can also check it out here: www.rockymountainatvmc.com/Sales/2790/Honda-TRX-400EX-ATV-Build
Thanks for watching!
Love this video, those head light bulbs you were talking about do they have a high and low like stock bulbs? Also are they just plug in and go or do you have to mess with the wiring?
Yes the bulb is a dual filament so if your machine has a high and low setting, this bulb will do both. Also it's a direct plug in replacement of your stock bulb.
Thanks for watching!
@@rmatvmc awsome, im going to probably order a set. I love my lexx mxe slip on
Did you have to replace any of the handle bar cables with longer ones when you added the new bars?
No you shouldn't have to unless u really go with bigger bars, on mine I went with renthal fat bar there the same size as stock but they are so much better then any other bars I've ever ridden with
With risers?
No risers
@@jakesprietzer257 but with a fat bar u need diffrent bar mounts
Thank you really appreciate the info
Do you think a 400ex is a good starter quad for a 16 year old that has little experience on a quad and a pit bike.
Where did you guys get the pro taper handle bars? I'm trying to find some for my 2002 400ex and can't find any
350 WARRIOR NEXT
I second this. I've owned 3 warriors and it was my first ever quad. Plenty of power to have fun on. What I remember most is the insane torque. Coming up on a big hill while cruising slowly in 3rd or 4th gear? No problem, just roll on the throttle a bit and it'll pull the hill easily even if you're a gear or two to high. Good times.
The warrior is coming soon! The warrior is another solid machine that lasts FOREVER! Do you own one? - Josh
Rocky Mountain ATV MC yep it in the shop right now can’t wait to get it back