Buying The Cheapest Honda 400ex To BIG BORE

[@2vintage]

Any recommendations for cams, big bore kits, and silencers? Please SUBSCRIBE and LIKE if you enjoyed the video! It really helps me out a lot! Instagram: 2_vintage_ Thank you for all the support!

[@MrAlex3250]

do big bore 426, stage 2 hot cam, some head porting, UNI air filter with no lids, a exhaust pipe and re-jet the carb. Would be nice to see that !

[@mikeschlup5279]

I have heard from 2 or 3 guys hot cams can be junk...these do not take a radical big bore kit...without a new crank etc...a little more power will not be a problem.i ran into a guy who had a 440 kit and his bottom end shortly after rebuild.

[@robertackerman5314]

My 2000 400ex had a HRC 440 big bore kit with cam and a Curtis sparks pipe and silencer it was an absolute beast I regret selling it !!!!

[@Dada8050]

I've got a 440 big bore, stage 2 hotcam, ARP style HD head studs, port and polished cylinder, DG silencer, flathead FCR carb and a K&N filter on my bike and its retardedly fast for what it is.

[@klxzay1115]

Hey man I really like your vids but what happend to the wooden dirt bike build? I really want to see it built.

[@2acres933]

I had one of those back in the day. For an air cooled quad they are surprisingly fast! Classic quad!

[@mikeschlup5279]

They handle nicely too.

[@jacob8770]

I had mine up to 60 mph before, and it stayed straight

[@Trxwhippa]

i had a 2004 bug eye edition 400 ex, 440 big bore, stage 3 hot cams, bigger jets, and had a high compression piston in it, thing was a beast for sure!

[@Jerry-dk8se]

The garage updates are looking great, Joe! 👍 You might need a parts washer. Then all of the work you put into these machines will reflect the work. That 400 is going to be a BEAST when you're finished.

[@2vintage]

Thank you! Yep looking to buy one soon

[@paull.9563]

It’s probably just low on blinker fluid if not then it would definitely be The cotter pin on the knuckle buster probably loose or missing. Just slap it rub it down and twist the throttle that would be my advice

[@lifeononeweel3008]

I got my braincells back and then lost them again with this comment

[@powerbomb400]

I have a 2005 Honda 400 ex that I put in the 88mm piston and a Hot Cams Stage 2 hotcam. Still retains the low end grunt but the cam helps alot with mid to upper power range. As you bulletproof motors. As for the 450r they have a much higher compression which is what it was made for the track.

[@Hanky_Bannist8r]

I got to ride my brother's 400ex with a 440 kit and it was spicy ! Definitely heaps of a different machine than his stock one. You can't overbore the stock cylinder too much without overheating issues and or not running right on pump gas if you get over 10:1 compression. If anything, go 20 thousandths over on the stock cylinder with a forged Piston and bigger cam the big bore kits aren't cheap.

[@Davido50]

Truth! Good advice for Joe. I would rebuild to stock form myself. Athena top end kit..new maier plastics an sweet gripper seat cover. Be worth 2800.

[@jeffreyalejandre9306]

$800? Dang that’s more what I paid for mine! I paid $650 for my 2000 red 400ex that is pretty much stock with new tires and fmf exhaust and power bomb headers! It runs & drives great and all it needed complete rear end replaced except the Axel since I was able to salvage it! I must of got a smoking deal! I just got in to riding these quads man and I Love watching your videos! Keep it up!

[@jacob8770]

I paid 400 for mine, it’s a 2003 and was missing a carb and air box

[@justinm6110]

I just bought a yellow 05 , the guy i bought it from knew nothing about it ,tore it apart and it was a 440 big bore with 11.1 wiseco piston with stage 2 Hotcam, i put a new cylinder and rings and cam chain and bigger header pipe with a HMF muffler and its just as fast as my 450, they get fast bro, i also have a bone stock super clean 06 so i can get a feel on how much faster they get when you start modding them, it sounds awsome.

[@N3LP]

2vintage uploaded todays going to be a great day

[@j-beatsimaginationstudio1987]

lol basically no compression, wind hits a wall at 20 psi prob lol but you will have this 400 purring like a kitten soon enough my friend. Be safe :)

[@vwsandvettes3253]

I made my own piston pin puller with a threaded rod, 2 washers and 2 nuts. It works great and doesn't stress the big end bearing or crank.

[@JustSomeGuy38790]

Yep 3500$ is about the norm don’t go crazy on the bore people say 440 overheats I got a 416 kit with a stage 3 cam and it rips! It has been running good since February 2020. I bought my kit from BP Racing on eBay. I haven’t gone to 426 but haven’t heard anything bad about them

[@fullmetaljacket7]

27:48 You can dissolve and remove the aluminum on the cylinder wall using muriatic acid. If the coating isn't chipped, you can sometimes get away with it.

[@austinsoderberg8216]

I swear so many ATV KZbinrs are doing 400ex builds!! Wish I had that when I had my 400X!

[@ShiningRevolver]

Completly oem, I love it. And mine is identical, already did a 440 stage 3 cam flat slide carb port polish lightened flywheel, can’t wait to see what you do

[@Sum-wk5li]

I have 99 400ex. Just this past summer I bought a brand new 426 big bore kit and crank. Had a 426 kit when I bought it. It has a web stage 2 cam and a wiseco crank and a keihin 39mm carb. It's pretty fast and lots of fun. The top end speed is where the big bore shines. i noticed when searching for a 426 kit were hard to find. I wouldn't go 440.

[@rhiantaylor3446]

The valves did look OK but to be sure I would have applied pressurised air to the spark plug hole to see where it comes out - or - after taking head off, replace plug, set it on bench on its back and fill combustion chamber with kerosene or gas to see if and where it leaks out - ilet port or exhaust. That rod looked like it had gotten very hot.

[@erichemmelgarn4623]

Just keep it stock bore or a 416, you’ll ruin your crank doing a 440

[@BWADaniel]

I did a 10:1 Wiseco piston on the stock 397cm bore, stage 2 hot cams & new valves and springs along with 2 four inch spal fans on the oil cooler. My baby is scary fast lol. You don’t need a big bore kit. It becomes unreliable at that point.

[@reesegaster1611]

Very excited for this one just got my motor parts in and frame back from powder coat for my titled 01 400ex build

[@Aklegend25]

Man I’ve always wanted a 400 ex to build but even the ones in my area that are blown up or need serious work you are paying at least 1500 bucks for it

[@2vintage]

Man that sucks. Hopefully you find one soon!

[@johnnytwotimes7831]

Just grab a 426 with stage two cam and a HMF exaust . Trust. Yes it will keep up with the 450 maybe even smoke it. The 440 will definitely smoke it depending on the weight of the riders on each bike. Also if you want to enjoy it alittle more widen the rear axel a half inch on each side don't really need to do the front a arms but... It would corner so much better.

[@CaydenBurgei]

Love these 400ex builds keep up the good work.

[@dropkickking4289]

Sweet I got a 05 raptor 660r for 500$ from under a tree and started after some attempts

[@chase8545]

Bro do a 426 13:1 they haul ass and pair it with just a regular hotcam stage 2 and I know what everyone says about head studs but you really don’t need them.🤙👍 and a 4” spal cooling fan goes a long long way. You get more power from compression than from cc’s

[@c0munguyforcaz]

now thats a clapped out bike! great video!

[@bighomieJ5X]

Big Bore Kit FTW ,she's gonna fly 👏🏾👏🏾

[@Gladiatorguy1998]

I had an 04 with a 416 kit, high compression piston and silencer and it clocked 82 on the gps.

[@destruct61]

I big bored my Suzuki Eiger 400 and it was a pretty nice improvement I went .40 over.. for cams I'd recommend either hotcams or web cams and go with an hmf silencer for it

[@Yamahabanshee66]

Yoshi pipe and silencer

[@27Zangle]

Used ATVs are stupidly expensive now, including here in Alaska. They are also getting harder to find in good used condition and not clapped out. Starting on January 1st, 2022 it will be legal to drive ATVs on public roads that are 45mph and under. Of course, this is with them being licensed and registered accordingly. My local coastal is not allowing ATVs in town sadly.

[@deltafreshrelics1660]

The 426 kit with a stage 2 hot cam and pro circuit pipe was a blast of a machine.

[@shanefarmer7193]

Taking the plastics off was an aprovement for this quad

[@TwistedTriggerEnduro]

Another amazing video!! Your a mechanical wizard and editing expert. Thanks for posting!! 🔥💪

[@peteraitken6494]

Great job so far joe doesn't look too bad good luck with it 🔧🔧🔧👍👍

[@NorthFloridaOutdoorsman]

Got that heater ready , shop is looking good

[@2vintage]

Thanks!

[@c0munguyforcaz]

quick tip for your garage, use the kids mats. they are cheap and easy to clean

[@nalyd6386]

Love the videos man, favorite KZbin by far, keep it up. Not sure why but I’m absolutely addicted to your videos, watch these things when I’m pooping and everything 😆.

[@alexkentner5647]

sparks racing exhaust, stage 3 hot cams , high compression piston

[@jacob8770]

I got my 2003 400ex for $400, it was missing a carb and a air box. Now I have it running and it’s amazing, I need a stock muffler for it though because it’s too loud with the aftermarket one.

[@rotex380]

Love the video's man🤘👍 thanks for sharing with us..

[@atvseatexchange2176]

416 is the optimum size for that motor. Let me know if you need a custom seat cover, no charge, to help with the cause. When you got jammed up with that Warrior seat I couldn't believe people conduct business that way but I'm old school. Let me know if you're interested and good luck with the project.

[@rico6249]

Put a big bore 440cc kit on it with a stage 3 cam, it was like 600$ on ebay and a slip on yoshimura silencer is 400$ for it, i think i would be a great combo

[@acerig4675]

That intake boot look real sketchy, I would definitely inspect that for a lean condition

[@brian395]

Valve seals are a issue with 400's good idea to replace

[@LiveFreeOrRIP]

the thing about a clapped Honda is that you can UN clap it and its worth doing it. Thats why they are awesome bikes!!! Some bikes are NOT worth the fuss they are still junk even fixing them up..

[@joshuacoyle6584]

Made my day

[@ejtakach]

Like the fancy carpet!

[@chuckaiosa1193]

Garage looks great! Can you do a video on Chinese carbs for ATV’s these carbs are killing me!

[@salocin2124]

A bore kit would be epic but also don't see a lot of yamaha warrior 350 would love to see another

[@superslow7609]

I love 400ex man i wish i would’ve came across that but badass quads

[@braaptv6838]

Damn she looks rough, I’m sure you’re the man to bro g it back to life

[@fuzexninja1292]

Please do the build I rebuilt one from the ground up and still have yet to ride it and it’s been like 3 months it’s been sitting

[@THEDUKELOVER]

Ive been wanting to try rebuild a 4 stroke

[@BillWilliamson420]

aye man i love the 400 ex videos

[@RealLifeSim]

The nerf bars were a pain to get off

[@josephcarino5829]

Thats aluminum from the piston in the bire on the one side. Brush muriatic acid on it. It will come iff

[@larrywarner9314]

Use muratic acid and que tips and that aluminum transfer with wipe of then either bore it or hone it and new piston

[@roryk.3568]

Looks like you bought one from the same people as I did, don't like to run air filter. Looks like dirt on the piston. Mine was full of dirt and the cylinder was as smooth as a babies but. Had to do a complete rebuild.

[@TroyRosenbaugh]

Probably gonna need magneto cleaned up to really spark good.

[@edwinsundquist8072]

You should put a 440 kit in it.

[@martyl7709]

Garage looks great

[@myguitaryourface5160]

If it sucks up water wile running it will do that I have a 400ex also and have had it happen to me from having no air box lid

[@zbigniew7584]

Big bore and silencer 👍👍

[@mariomessinese5287]

Those nerf bars look like DG brand steelies

[@joshuaurban2007]

I just bought a mint one for 2800 bucks 04

[@larrywarner9314]

Look Joe use a heat gun on those stubborn cylinders when they don't want to come off

[@mealex303]

Paint the nerfs yellow and maybe if possible replace the rear tyres with that spare set you got with that crazy banshee that also had wheely bar that time . I'm sure you are a glutton for punishment aren't you lol but still u kick ass eventually always. I look forward to seeing you doit again. 👍

[@OGKILLa9365]

Those nerf bars are hideous. I'd take them off and toss them in the trash

[@TroyRosenbaugh]

Be a bout a 420, should be nasty, that big bore with stock head gonna make power. Trust me.

[@rolfvuorinen2025]

More and more I wach these quad vids I want to buy a quad but they are way too expensive for something desent in finland.

[@shoes121255]

Get one of those plastic repair tools that melts the little wire into the plastic to reinforce the repair

[@handsolo6241]

I got a 440 ex, cam, Alien duel exhaust. Almost a match for my 450! Don't get the super high compression (Like me) piston cus buying race gas sucks. F.y.i. Almost never ride it because of that.

[@alexkentner5647]

put a kicker on it that would be cool

[@DJswope73]

Do a big bore blaster to run with the 250 2 strokes lol

[@TroyRosenbaugh]

Compression release stuck open, smashed piston?? Just a thought.

[@antoniomancini1794]

Great video

[@dereknewberry9457]

440 kit with stage 2 hot cams kibble white vavles you’ll be fast lol

[@m8fusion712]

It's not a bad looking quad just needs tlc

[@VRafaZ]

U didn't show the piston up close

[@Neworleansickk]

What was that compression test method you do there bro

[@blasterman5063]

Is it rare to have blue a arms on a 2006 Yamaha blaster because I saw that banshee had that and it was rare

[@gtisid]

you skipped past the little end bearing but it looks like it was welded to the con rod judging by the heat marks. is it still intact? does the crank turn over? hope its an easy fix

[@austinmcd5933]

I got mine mint with a 440 just a bit of rust for 1,200

[@joetaverna5264]

loooooksss can indeed be deceiving. Nerrrrfffff bars garbaggggeee it's obvious this quad was road extremely hard and damn it the hell put away Weeettt

[@MarcHord-mk5ff]

Well the tires are on it.

[@MM_in_Havasu]

Tight or bent valves.

[@matthewtaylor4079]

What jump box and battery do you run?

[@kylerwilson1092]

Do a tacate 4 vs quadracer vs trx250r

[@aydancochran3321]

Man wish you could find a Honda mt 125 Elsinore

[@megamindtvsydney3967]

Does this motor have a oil screen? Maybe blocked

[@xxgtanobot12xx39]

I found a guy selling one running just missing a battery for only 300

[@OGKILLa9365]

You'll need some cooling fins, oversized oil cooler, and bigger oil tank. I had a 400ex with a big bore and they run hot. You'll need a hotcam, some clean-up porting that you can do yourself, full exhuast, preferably curtis sparks, and a trx450r carb, That's probably the best way to setup a big bore 400ex

[@aroncurtis7874]

I got a 03 400ex and it has the 420 big bore in it...frickin thing is cherry and beets a stock 400ex buy mabye 2 quads...no cam in just the big bore.

[@johnbeaudette583]

I have been curious for over a year now so I gotta ask. Does anyone on KZbin check spark plug gap ? No channel has even mentioned it in over a year of watching these types of videos. And isn't the vehicle's stock jetting based off sea level elevation ? I haven't messed with engine's for over 35 years, so may be out of the loop or forgetful. But, i don't think they sell different spark plugs for every engine. And I have never put a plug in any type of vehicle that didn't get it's gap checked or adjusted. Just curious. Cheers

[@johnbeaudette583]

@@titletownclowns1545 Interesting. I wonder if that is why channels don't mention it. They think it is some secret sauce. Lol. Last time I really worked on small engines was when I was 12 ish years old, as far as I knew all this was basic knowledge. I guess having multiple mechanics in my family was more beneficial than I knew. Cheers

[@johnbeaudette583]

@@titletownclowns1545 I agree. Never did any racing but, knew about some of that. Thanks for the info.

[@wisecampmotorcycles8258]

Spark plug gap is set at the factory. Unless the spark plug has been dropped, or handled badly, I've never had to adjust any new spark plug gap. If the spark plug is old, and has done a lot of miles, the gap will increase with wear.

[@theboogieman401]

Dope ! I just got the kx85 2014 going to touch her up ⬆️ my last video got 2k out of no whereeeeee ABG ANY BIKE GANG GANG BUZZ BUZZ 🐝

[@dallasstepto8409]

That thing got red hot

[@200mmonster4]

Good score. Big bore that sucker.

[@other_brother_darryl4714]

Is it just me or does the small end of that connecting rod look like it got real hot? Almost looks black or dark blue on that end. Go for the big bore kit, might as well at this point… good luck

[@wisecampmotorcycles8258]

Nah, it's just you.

[@gustavoarielalassia]

🏋️GENIUS🏋️👈💯💯💯

[@myguitaryourface5160]

Dg steel nerfs