1999 Honda TRX 400EX ATV Build

Honda TRX 400EX ATV Build:
www.rockymountainatvmc.com/Sa...
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.
Click Here To Subscribe To Our Channel!
/ @rmatvmc
Follow Us On Social Media!
FACEBOOK: rmatvmc?utm_...
INSTAGRAM: rmatvmc?ut...
TWITTER: RMatvmc?...
#hondatrx400ex #trx400exbuild #atvbuild

[@roblewis7186]

Just picked up an 03 for a few hundred dollars that definitely needs some love. This build is super inspiring!!!

[@TwoAMBlacktop]

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.

[@andrewrenz1378]

TwoAMBlacktop that sucks goddamn

[@JohnnyRebKy]

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

[@TwoAMBlacktop]

JohnnyRebKy yeah, they built a lightweight fun tank of a machine.

[@danielsalas6269]

Shame. I had an 08 I bought off the showroom floor and got stolen a few months later. I know how it feels.

[@tommywallbanger]

@@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.

[@kiwiridernz69]

5:00 RIP shifter

[@christopheravery5808]

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.

[@samstung9110]

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.

[@smr4712]

great bike

[@heydude4532]

Bought mine in November 98 and I’ve still got it

[@rmatvmc]

That's awesome! Is it still running great for you? - Josh

[@Kaelan514]

Dang definitely hold onto it so in 30 years you can show the title and say you bought it 50 years ago

[@GWHcraig1088]

loved the razor 2's on my 07 trx450er. but sold it and bought a new 2019 rancher ES. kinda miss it

[@1slow5point0]

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.

[@willy_willy-jc8bz]

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

[@Davido50]

More build segments pls! Great stuff.

[@mattrimmel9165]

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

[@jbird1173]

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.

[@codytorstvet9904]

Exact set up I have. The 450 carb really turned the bike into a different animal!

[@DavidRobinson-yc2sp]

How to put rings in

[@DavidRobinson-yc2sp]

Need to no how to put rings in

[@Harrapsy]

DAMN Do more vids about 400EX ! We love that !

[@rmatvmc]

Glad you like it! We should have more ATV vids coming down the pipe soon. Thanks for watching.

[@gregboy5944]

The best trail quad of all time

[@Davido50]

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.

[@dellstudio10]

Good job, she's a beauty.

[@hunterprice492]

The quad looks awesome

[@AlphaVisions15]

Digging the quad build videos

[@andybrooks4070]

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

[@drunk_cat9975]

Probably just needs a carb clean

[@willyyoung4240]

Carb that's it then it will be a turn key honda. They're the best

[@bradwedge8276]

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.

[@Xhrro]

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

[@rmatvmc]

Nice! We're working on a CR250 build right now, so make sure to stay tuned for that for some ideas on yours! - Josh

[@BraapEffex]

That's a minty fresh 99 400ex you got there...

[@kiwiridernz69]

Best looking quad

[@citabria4804]

You guys should do a build on a Honda TRX250R

[@evaneyeball7953]

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

[@jnewlander9483]

I went from a 2006 250ex to a 2004 400ex and I love the shit out of them both, bulletproof

[@evaneyeball7953]

@@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

[@jnewlander9483]

Next up is to try and find a trx250r I always wanted one of them

[@shiftinggearsandpassingque3563]

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!!

[@davidmorace3213]

I got a 2 stage cam and a bored out carburetor and it’s got a lot of power

[@the_real_greywolf]

Nice looking build! :)

[@copyth5748]

I've got a 2004 TRX400EX sports 05 model.

[@militantminded109]

400ex lives onnnnnnn...love mine

[@grizzly7865]

Thanks for this video

[@cbr600rrturbo]

Great build! Next trx300ex, trx450r & trx250r

[@cody181818]

I have 2 of these quads. Love em there amazing fun

[@rmatvmc]

Yes they are!

[@schmidfarms1702]

Great Video!

[@slspg]

Bought one brand new back in 2002. Some viewers weren’t even born...makes me feel old!! Lol

[@dalejrjunior1298]

The one extra thing i would add is a motion pro race throttle it replaces the thumb throttle with a dirtbike style

[@s.p.i.racing7509]

Crazy how this one the Baja 1000 out of all of the other machines out there

[@23jordian]

Won

[@connersnow298]

Awesome vid and edits and filming and bike

[@harrisoncrick6112]

Y’all wanna do a giveaway with this atv?😂

[@georgerivera4266]

They should

[@bananadude2374]

Harrison Crick yes

[@paulmorris8061]

I had one of the first ones my dealer got in. loved that bike.

[@oscarlopez3217]

Can you guys do an ltr build?? And then maybe a comparison to newer machines haha

[@lazarmrsic5623]

What spacers did you guys use in the front and how wide is the back looking to make mine wider

[@mariozuniga1419]

I got the same one but yellow I wanted to ask can you change a twist throttle to a thumb throttle?

[@larrybanks2403]

The 400 ex with the double light like that has always been my dream quad that or a raptor 700

[@rmatvmc]

It's definitely an iconic look! We were pretty lucky to get this 99 is such good condition! - Josh

[@larrybanks2403]

Rocky Mountain ATV MC nice I’m looking at an 02 model right now in great condition

[@jasonwhite8722]

@@larrybanks2403 ive got a 99 model .. with a lot of nice upgrades Dont want to sell , but could use the $$ in east NC

[@dinkdink1806]

@@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

[@waserak47]

Love my 2003 400ex

[@wittelarry1]

Nice build

[@dannyrocha9618]

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🙂

[@tommywallbanger]

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.

[@miller2167]

Super nice EX ... actually want to build one to look exactly like that one ... Everything added fits n looks great together .. 💯💯💯🔥🔥🔥

[@riverjames1020]

You won’t be sorry we have had our 400s for over 20 years and they still run strong

[@miller2167]

@@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

[@riverjames1020]

@@miller2167 lol ya one of ours was totaled 6 times and rebuilt once

[@miller2167]

@@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

[@riverjames1020]

@@miller2167 ya well I didn’t say it was cheap lol

[@331moto]

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

[@OgreMoto]

You guys should do a TRX700XX build!

[@rmatvmc]

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

[@frankyalvarez7160]

Rocky Mountain ATV MC there are a few in Franklin Tennessee. Not that rare out here.

[@juancarlosdediego9584]

Can these engine mods be used in the xr400r ? I have a 1999 xr400r

[@rcox09]

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

[@waserak47]

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

[@ddbrocato]

Freakin legend of a quad

[@willyyoung4240]

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.

[@rickychisolm1376]

Kmsl 😂😂😂 shit 1 Buddy can't get his raptor to run for a day

[@willyyoung4240]

Tell him to bring it to Da' Camp

[@johnwarick4022]

Have a 99 model, wondering where you got those a-arm guards?

[@alexischatigny6183]

Is the protaper se 7/8 Atv Low bend will be comfortable on my 01 400ex considering im a small rider (5"7)?

[@jackv.673]

What are the specs on the front and rear wheels and tires?

[@carterschaecher8041]

I have a 99 Honda 400ex runs great but I need to go through the motor

[@loaizafilmz1109]

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

[@250rtrxjunkie]

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🤩👍🏻💨💨

[@awizzle727]

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.

[@250rtrxjunkie]

@@awizzle727 I'm not bagging on the 450 I just had one bad experience after another.

[@cingram8168]

Still the best all around quad after all these years

[@LolliWANG505]

Lol nah trx450 is better fs

[@smr4712]

@@LolliWANG505 not on the trail

[@SaltyBob355]

What are the best years to look for and which are best to avoid?

[@mxlura1]

Can you make a build video with a 2004 Ltz 400 if you get one

[@marianozamora7922]

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

[@garrettbussiere3984]

You guys should do one of these videos for the 2018 honda trx250x

[@jasonwhite8722]

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.

[@Codyrosa]

Had a 440ex with some aftermarket shocks and other various mods.. loved it. Definitely reliable and a great quad.

[@ryanwelter8159]

How many decibels is the Lexx exhaust with the trail tip

[@jackworkman1999]

You should do an xr400r enduro build next!

[@rmatvmc]

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

[@mccatdaddy]

Iv got one. I’m actually going to be getting rid of it. I bought a used gasgas 250 2 stroke to replace it.

[@jackworkman1999]

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.

[@bradfordstoll5191]

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.

[@Wild1KY]

@@bradfordstoll5191 yes! Get it “jetted”

[@jesse.jsmall0652]

How is a 2002 400/440 ex with stage 2 hot cams

[@colinlogan4879]

Should do trx450r front shocks

[@jeremymaserang8664]

What are the specs on the wheels and tires? Thanks! Dope video

[@nickadz5490]

I had a 1999 400ex bored to a 440 years ago .. it was a good very good trail bike

[@rmatvmc]

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

[@nickadz5490]

@@rmatvmc absolutely .. it really gave it the bottom end torque it was missing

[@mikeyyywill]

The footy in this video is sick but I own a 2000 Honda 400 ex and its a beast

[@rmatvmc]

Thanks, Michael. Glad you like the shots. Have you don't anything to yours?

[@mikeyyywill]

@@rmatvmc nothing yet but soon haha

[@lukegibbs8621]

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 ?

[@jasonwhite8722]

they make alloy brackets that bolt to the bars , or you can drill a few holes and mount them in the plastics

[@kaniealexander9295]

when can you guys make a yamaha raptor 660 top end rebuild ??

[@Brensta18]

Kanie Yoshiki Yamaha sucks

[@kaniealexander9295]

@@Brensta18 so ? I dont give a damm if yamaha never worked out for you than there's nothing I can do for ya

[@jasonwulff8341]

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?

[@rmatvmc]

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!

[@jasonwulff8341]

@@rmatvmc awsome, im going to probably order a set. I love my lexx mxe slip on

[@jackwood2269]

So I’ve had an 04 Honda 400ex for 8 months go riding all the time and last weekend I started it up was letting it idle and it cut off and I tried to turn it back on and it made a click and lost all power. I can’t jump solenoids nothing happens when I do, I can only bump start it. Is the issue the ground? If so where is the ground located?

[@cbr600rrturbo]

PLEASE do a stock or close to stock TRX250R Review then a build series you'll get alot of views

[@briangagne5080]

Best simplest most fun cheapest quard to own...

[@mateonavarro6881]

Where did you get the graphics kit at

[@tuckerrau848]

What size are the rear tires?

[@loganlauffenburger2613]

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!

[@rmatvmc]

That sounds like a sweet machine! What are you riding now? - Josh

[@loganlauffenburger2613]

@@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

[@nathankoroush7918]

still have my 2002 ex400, stock

[@randyreynolds6508]

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

[@250rtrxjunkie]

We call them pogo sticks😂🙄

[@rmatvmc]

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

[@jasonwhite8722]

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 ..

[@jayryan7473]

Randy You're stupid. We are here to educate others not tell them how to be stupid and throw away front suspension.

[@tommywallbanger]

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?

[@Thesoccerkid587]

I have one to it’s race ready

[@3rdaxis649]

I LOVE my 400EX!!!

[@rmatvmc]

What have you done to yours?? - Josh

[@3rdaxis649]

@@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....

[@calebj.4756]

God bless spread his word!

[@caymanbrubeck6661]

what do you think about bead locking wheels on the 400ex?

[@trailblazer8380]

Do it!

[@RideWithTheWolf]

I need that engine for my xr400 😃

[@traxxasrcfun]

Most reliable quad you can get that has enough power to have fun (after a couple mods)

[@rmatvmc]

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

[@traxxasrcfun]

@@rmatvmc I couldnt say it any better myself sir👍

[@adolfhitler9284]

Are 400s good beginner bikes ?

[@hitman3531]

quick question for Rocky Mountain, was wondering what size Douglass rims you are using for the front and rear on this build, I have a 2001 trx400ex in desperate need of new rims and tires and want to replicate the setup in the video

[@rmatvmc]

these are the Douglas A5 wheels. Front 10x5 3.0+2.0 Rear 9x8 3.0+5.0 Tires are Maxxis razr wheels Front 21x7-10 Rear 20x11-9

[@hitman3531]

@@rmatvmc awesome thank you for the info! Cant wait to start making my trx nice!

[@loganmoyer7307]

Ure Jam nut on Ure axle nut should be against the axle nut.

[@aaroncassatt4837]

has anyone notices the axle nut is on wrong?

[@Kyle-fu6en]

I love the 400 ex but the front shocks are horrible

[@17madracki17]

really needs some Elkas to top it off.

[@rlnajera03_11]

Does anyone know what size tires and rims they used?

[@rmatvmc]

This quad has Douglas A5 wheels in 10x5 3.0+2.0 for the front and 9x8 3.0+5.0 in the rear. Tires are Maxxis Razr Front 21x7-10 Rear 20x11-9

[@jc18052]

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.

[@cbr600rrturbo]

Yaya!

[@Lowkey_ary]

Project raptor 700 next

[@boostgaragebuilt1363]

Can you guys help me out? I got a 400ex too can’t get it to spark up. I’ve replaced everything electrical but the cdi could that be it? Or is it just a bad wiring harness?

[@dellstudio10]

Check your kill switch. Had one break on me a while back. Took me a couple of hours to track it down to a faulty kill switch. Pull it apart and look for any broken wires, rust and corrosion. Also check all the fuses and relay's.

[@boostgaragebuilt1363]

dellstudio10 found out my issue when I installed the stator I put the wiring on the wrong way where the two bolts hook up on the side cover got it finally sparking, but wouldn’t start up so I took it apart and then found out the piston broke as if there was no oil so getting a new oil pump better to be safe than sorry

[@parkerconrad7795]

The stage one cam gives low to mid range power btw not high range