Honda 400EX ATV Carb Rebuild & Cleaning | Partzilla.com
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- Опубліковано 27 вер 2024
- Buy individual Honda TRX400 carburetor parts for your rebuild: bit.ly/TRX-carb...
Buy a TRX400 carburetor rebuild kit: www.partzilla....
Is your ATV hard to start or does it idle rough? This is the place. In this video from Partzilla.com, John will show you how to disassemble, inspect, and rebuild the carburetor on a Honda TRX400 EX. Above you’ll see two links. One offers a list of the individual parts you may need to address specific issues with your carburetor, and you’ll also see a link to a carburetor rebuild kit, which has many of the parts you’ll need.
Get a closer look with our Honda ATV parts diagrams. You can see all of the parts for your carburetor here: www.partzilla....
Read how to do this job step by step: www.partzilla....
Starting issues aren’t confined to the fuel system. Diagnose starting issues with your electrical system here: • Help! My ATV Won’t Sta...
Change the oil and clean the air filter while you’re taking care of maintenance: • How To: Honda ATV Oil ...
VIDEO HIGHLIGHTS
Carb disassembly - 4:06
Hose inspection - 4:44
Pre-filter inspection - 5:14
Pump diaphragm inspection - 5:36
Float bowl and float needle inspection - 6:08
Air/fuel adjustment needle inspection - 7:38
Main needle and idle jet inspection - 8:48
Cleaning the carb body - 10:34
Cleaning carburetor passages - 11:29
Carburetor rebuild - 13:16
Carburetor installation - 19:01
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In the video we’re working with a 2007 Honda TRX400 EX, but you may have similar steps for your Honda ATV. If you’re not sure whether these steps apply to your machine, leave a comment and we’ll get back to you.
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I don't even speak much English and just watching carefully do it helped me save more than 500 dollars. My family and I can't thank you guys enough! Muchas gracias!
your videos are the reason my quad runs accordingly lol.
I followed this video for partially rebuilding my 2006 TRX400EX carburator with the AllBalls rebuild kit. I honestly know next to nothing about carburetors, but this video helped. The video you have on the valve adjustment was key too. Quad runs perfectly now.
I hated that rebuild kit couple parts arent the right size compared to the oem the main was too small
I have never done anything like this before and your video made me 100% successful! Thank you.
Great to hear!
Watching your videos gives me the confidence to do it my self. I'm already a hvac mechanic but this is a different beast .
ruben flores just got into the HVAC trade. I am currently a new home installer
Great video, got my quad running thanks to a few of his videos.
Thanks your video helped me get my 2007 trx400ex going...
+Garth Morris: Glad to hear it, Garth! Happy to help.
Great video, this really helped me in cleaning my carb up and also finding my problem. My carb was missing the screw to the slider arm. It still ran but would not rev out and I couldn't figure out why. It has a ton more power now. Thanks for the great video.
A way to make an adjustment tool for the air-fuel needle on the bottom if the carb is on the bike or off.
Take a piece of hot glue melting it on the end jamb it up there letting it cool then trim off the excess on the sides.
Cut the hot glue to the length you need to get it in there. Put a mark right in front of you on the glue stick. Good to go:)
1/4 nylon tubing will work as well just get the tip of it rounded when hot before you push it up there.
This video worked on my 2000 Honda 400ex. Thanks!!
I think its hilarious at the end, it barely turns over, and he says There u go lol a no sir let it idle and we'll see
I felt cheated there at the end too. All that for some bs little bump.
You should make a video on a 300ex. How to rebuild the bottom end.
Good breakdown. But I want to hear it run, at least Idol for 10 second But I saved the video in case I have to work on mine someday.
Great video, you fill me full of confidence to perform repairs.
That's what we love to hear. Thanks for watching, Walter!
What cleaning solution do you use in your ultra sonic cleaner to clean carbs?
Next video take out two bottom subframe bolts and push up! Giving you clear view of all of it!
Atv sounds as if it’s sucking air can that be possible a leak on the small hoses on the carb , it runs during the choke and without this video I was going to spend big money so thanks for the help , just one part of the float bowl wasn’t shown which was the plastic thing on the jet that’s very removable...
Thanks for making the vid, very helpfull, and most detailed that I have seen so far. Got my carb off and about to start breaking it down.
+easttxtycoon: Awesome! Thanks for watching Easttxt. Shoot us a comment if you have any issues breaking down the carb and we'll do our best to help. We also have an OEM diagram page detailing how everything goes together on the 400EX carb: www.partzilla.com/parts/search/Honda/ATV/2007/TRX400EX+A/CARBURETOR/parts.html
do u guys sell the air fuel flow d shaped key
When I put my throttle cable back on the carb the idle speed went up. I can't figure out if I did something wrong or how to fix it.
At 13:50 you say the "spring follows" by the washer and o-ring. At 8:11 you take the needle out saying "there is your 0-ring and there is your spring" falling out last and you never mention the washer with that assembly. This just so happens to be the only reason I came to this site to find out the order as the sob fell out when I wasnt looking.
You put it back together wrong it looks like because the washer would have to prevent the spring from damaging the o-ring after the spring sealing it all in the carb.
Unless the washer and o-ring jumped over the spring while you carefully pulled that needle out.
Then again you had the needle out halfway when you said that and it looked like the o-ring was on the needle. ty
Why didn't you check the holes on the sides of the Jets? Just because it sprays through the bottom of the jet doesn't mean it's getting vacuums through the side holes. Where do you get the mixture screw socket
So what happens if you don't have a screen filter for the incoming fuel?
Make video about set the float height, thanks great video!
I don’t think you can think the only way is to replace the float someone let me know if I’m wrong
You can’t on these 400’s they are plastic on some dirtbikes you can’t bend them to set your float height.
Will the rebuild kit become available again?
Right by my choke, there is a spout that is spitting gas out when get on the throttle while I’m driving. There should be a line there but I don’t know where it goes
There’s a hose on my 04 that I don’t know where it goes. It just hangs, when I shut off the quad it leaks gas. I plugged it off and now it wants to stall at idle. I looked everywhere for a place for it taking the length of the hose and searched all over for a location. Worked on cars all my life this has me baffled. Any thoughts???
Will rebuilding my carburetor stop my overflow tube from leaking when i have my quad turned on during idle?
I'm just curious why would people show people cleaning the carb or replacing Jets and needles why on the 400 EX don't you guys ever speak of number 38 in the schematic JET, SLOW AIR (#110) you speak of the pilot jet the main jet the needle and it's clip positions but my 400 don't even have an adjustable needle. I just bought a jet kit and I realized after I bought it by looking in the schematic it doesn't show that number 38 I don't even see it being sold inject kits what is that for?
I have a 2007 honda trx 400ex just gave the carb a good cleaning but cant figure out where the vacuum hose connects to. part number (95005-45001-50M ) It has a plastic Y piece close to the carb but got no clue where it goes on the other end. My stock petcock is not vacuum operated so where does it lead on the other end? It wasnt capped off. Cant remember taking it off when disassembling cant remember where it connected too...
Where do the 2 hoses go from the carburetor? The one that T’s at the top and then there’s one on the bottom???
Im having the same problem lol did you figure it out?
I found the little black shock absorber looking gasket (.25" long about 1/8" diameter)/ bushing it's pictured in some of the rebuild kits, but you don't mention it, where does it go?
I have the same bike you worked on I cleaned the carb completely used air and carb cleaner to blow out all passages all jets are clean and free of any debris drained all fuel from tank replaced with fresh fuel fires up fine with throttle revs fine but won't idle... Any suggestions?? Thanks
do you need the baffle plate? I took my carb apart apart and it didn't have the d hexed shaped bolt for the air screw it was a flat head screw with a gasket
2002 Honda 400EX. Backfires through carb will not idle stalls out. Runs fine up top pretty strong. Set for a while the person told me I purchased it from. Did a carb rebuild kit and still same issue. Help please!
Rebuilt the carburetor on my wife's 2005 TRX400EX yesterday because it was leaking through the overflow tube. Cleaned and replaced everything that came in the kit and the float needle, temporarily placed the carburetor back on the ATV and did a flow test, it failed, still leaking through the overflow tube. Any thoughts?
Hello I have Keikhin carburetor modeled KTB and it has two black adjustment handles can you please tell me what those are for and how they work together briefly you’re awesome thank you.
There is a small hose that is connected to the carb below the choke...I rode yesterday and when I woke up today there was gas leaking out of that hose...and I can't find where it was connected to. Any help?
kyle bienia over spill drain maybe
12:14 I did that before and it hurted bruh, i mean that stuff hurted baaad
It will take the fun out of your day!
You never said how to adjust the main jet clearance to the needle.
Hello what solution do you use inside of the ultrasonic cleaner thank you?
Very good videos you make, thanks a lot.Does it take many hours to rebuild a carburetor like this?One working day?
One day
so I tried so many things to fix mine at first it was leaking second I had to push the gas so it would turn on third I bought a new carburetor from amazon and it started to rive hella nasty last thing I cleaned the old carburetor and it didn't work
Thank you!
dude ... the rebuild kit was opened and laying out ... why would you put the old pieces back in when there were brand spanking new ones right there?
the nipple on the right side of the carb,facing the back end is that a overflow hose? I have fuel leaking from there so im assuming i need to clean the car but need t know f im supposed to have a hose there & if so where does it route?
When I took mine apart there was another plastic holding the float. I put mine back together now it leaks all crazy. The rebuild kit I got has a seal that seems stretched, doesn't fit in the float bowl groove, is that normal? Carb leaks all crazy now.
Please do a build series on 2004 trx450r
do you have the hoses for sale as a package. I see I can buy all the individual pieces like clamps and hoses, but just wondering if I can buy all the hoses in one package. I do not need the fuel hose that goes to the petcock or the hose that goes from inside the throttle cover. just the two ports on the side of the carb and the other one by the bottom of the carb that is like an overflow or something
Hey there, I cleaned out the ladies 400ex and while twisting down the throttle cable bolt to the carb i knowticed the mental tubing doesnt sit straight or to the right... it sits facing left when skrewed all the way down which interferes with the placement of the gas tank. Any ideas on what to do? Probably a no brainer but im having issues lol
Thank You.
my 300ex jetted and stage 2 hot cam wants to idle fine at first for a few minutes then it starts idling way to high any ideas?
if my quad dosn't rev all the way and bogs when i throttle it all the way down does that mea that i have to clean the carburetor
Where the D tool goes for the air fuel ratio, i dont have a D shape, its indented in a bowl shape what should i do?
love your vids thank you for this
Thanks, Joe! Glad you like what we're putting out. See you around the tube!
Partzilla so I was putting the hoses back on. Should there be 2 hoses dangling?
Hello CamRides. You should only have one dangling. Its the one attached to the float bowl.
What solvent do you use in the ultrasonic cleaner
Thank you I really appreciate that I have a 2002 model
Hello, on my trx400ex - yesterday I took my carb out for easy access to my starter which I rebuilt. After putting the carb back in along with the airbox - i turned the gas on, I immediately noticed that I am getting fuel in my airbox. This was not an issue prior to my taking the carb out. Can you tell me what the likely cause of this is? Thanks...you make great videos and raise my confidence level when working on my 2000 trx400ex
First things first, check your hose routing. You may have crossed something up
Got a keihin carb can I take the jets out my old carb and use them in the new on I have moose racing cdi box airbox delete with k&n filter dmc alien slip on will I have to do additional tuning
Partzilla I’m lookin for a video for an 05 yfz450 carburetor rebuild. Thanks
I don’t know if your still answer these but i’m hoping so. i just got a new carb for my 2002 400EX and it’s idle is very high . I know where the idle screw is, I just don’t know what to do
Turn it counterclockwise 1/4 turn at a time until your idle resolves.
Put a new carburetor on my 2005 Honda rancher 400 and it won't start. What should I do?
Is this the same carburetor for the 300ex? I'm having trouble finding the rebuild kit for it.
What must I do if my quad didn't want to idle
will you be doing anything aftermarket wise??? i think more 400ex's have aftermarket parts bore kits, ported polished head, shocks .. that kinda thing iv built a lot of 400ex but i love watching other ppl do it to them to see there techniques ..
+Adam Wolfcale Adventures We were not planning on it but the basic procedure for pulling it down and reassembling is pretty much the same and we have a 3-part video that shows a top-end rebuild. When you start getting into the really high performance stuff like pop up pistons you just need to be really careful with the piston to valve clearances. Modeling clay will tee just how close things are getting. Honestly, most of the kits out there have done their homework so you should be safe.
We’re is the carb drain for a 2005 trx 400ex
I know it's just a 250 compared to one of these 400 but can u please make a video on how to remove the stator of a trx 250ex? I cant seem to find a video on how to remove the stator.
The stator is on the front of the engine on that one, if I remember correctly, it's a little weird. I'll try to get a unit to do a video on.
I have a 2018 trx250x it started bogging i cleaned the carb(blew out the jets and all the holes) and it still boggs..any ideas?
Really good video, very helpful, thanks
+grillomix You are welcome. Will keep making more! Thanks for watching.
I am trying to figure out why my 4 wheel drive won't work on my Honda Trx 500, any suggestions?
great video my carburetor leaks gas constantly from a small tube on the bottom facing to the rear what can that be even when its running
Most likely a stuck float or worst case a rebuild.
what is the main jet measurement? the height of it ?
How come when I started up my quad it was stuck wide opened?
Badass Life - did ypu figure out what the problem was? im having the same problem
I readjusted the throttle cable and it fixed.
You put your throttle cable in wrong same thing happened to me
My quad wouldn’t start after I repaired my float please help????
Hello, I have a 2000 400ex. I rebuilt my carb tonight following your direction in this video. Thanks for the info. Question, when I got to the part where you use the d-shaped tool to remove the air/fuel mixture (at the 8 minute mark). On my carb it was not d-shaped and the head of it was practically flush with the top of what was screwed into. In other words, there was no where for me to turn it in (2.5 turns in your example) before backing it out. As a result, i don’t know how to set my air/fuel mixture precisely. Please sdvise. Thanks for your help.
The D Shape came in later years. Typically, you can put it at 2.5 to 3 turns out to start and adjust later if necessary.
Do you have a rebuild kit for a 2012 TRX400X? I cant find these part numbers when I look them up now.
Great video!
I didn't see you take off part #27 which is the jet holder. I have one on mine and I re installed after rebuilding carb. Please tell me if that's really needed or not because it is a pain getting the float bowl with new gasket on without the jet holder falling out of place. Is that why you didn't show it?
It's needed. It just wasn't necessary to pull it out. The perks of having a sonic cleaner.
What about the little “hat” thing that sits over the main jet is it nessassary?
Yes
Great video just wondering if this would be the same curb cleaning process for a 2004 Honda TRX 450r sportrax quad?
Regards
Process is the same, but the carb is slightly different, if I remember correctly.
Hi I was wondering about the mainjet I removed and cleaned it. But the little lock nut moved up or down. Does that matter and how should I seat the main jet now that nut has moved?
all you have to do is snug it back down. just tighten each nut on the main jet and it will be just fine!
How i adjust the idle on the carb?
dude you make that sht look easy, but i know better lol
those clips that hold the air box to the frame, were they used on earlier 400ex 's as well? I have a 2000 and I am not seeing on my air box the same clips
Might be slightly different on a 2000.
Is this the same for a 700xx
I just purchased a 2005 400EX that had been sitting in a garage for a couple of years. The quad runs strong but it won't idle. It will turn off within a second or two if throttle is let go. It has fresh gas. What can I do to make sure it idles properly? Thanks.
Clean the carb! Anytime it sits for awhile, the jets are probably clogged.
I got a 2003 honda 400ex. It got a k&n air filter and k&n air box power lid with a big gun slip on exhaust. It spits back into the airbox when cold and floods on idle sometimes. when I rev it theres abit of black smoke witch would indicate flooding. What would be the recommended jetting for under 5000ft?
All the aftermarket additions change the jetting. There is no sure fire solution. Units react different per mod.
is there something called a baffle plate inside the carb because I looked in the manual and it says there is something called a baffle plate and mine doesn't have it
Not sure what that is referring to. Here is a diagram and parts list for the carb. www.partzilla.com/parts/search/Honda/ATV/2007/TRX400EX+A/CARBURETOR/parts.html That might narrow it down.
where does the float tube go and i have no idea why its leaking out of the float bowl
Pretty sure you're talking about the overflow tube.
So I rebuilt the carburetor, turned on the fuel Petcock and fuel continuously drains out of the overflow hose. What did I do wrong?
Sounds like your float might be sticking or you may have missed one of the gaskets/o-rings. Time to run through it again!
How do you take the boot of so easy the screw keeps stripping
The impact driver helps get the screws out.
Quick question, I have 99 Honda TRX400EX, There is a small outlet or port at the bottom of the carb toward the back of the quad that was pouring gas out of it the other day and I'm trying to get the correct answer as to where the hose that was connected to that port/outlet goes to? I'm being told it connects to nothing and that its just and overflow. Also, on the side of the carb, there is two short hoses that connect to a Y or T and goes to one long hose, it was also hanging down. Can you tell me where that connects to exactly? Thanks
If there is a hose, it doesn't connect anywhere. It is basically an overflow to vent fuel. If it's pouring fuel out consistently, your float could be sticking or it's time to tear down the carb. The 2 into 1 hose is the vent hose. It goes in the hole in the splash guard behind the fuel tank.
Ok, Thank you for the information. It was a brand new carb, only had a few hours on it. I have ordered another one to install in its place. Thanks again!
love the videos
I have a 2003 Honda 400EX and the carb leaks out of the bottom. What do you think is the problem?
Float is stuck? Rubber gasket leaking on float bowl? Take it apart and give it a good inspection/cleaning.
Would it work to install a Honda 450r carb on my 400ex?
Does a Dynojet kit have all the things needed to also rebuild the carb? Like the rebuild kit that they sell?
It should come with a variety of jets and parts, but I don't think it comes with gaskets. It would depend on what you need for your carb or how much you're rebuilding. If you don't have leaks and it has just sat for a long time, you should be good.
Partzilla Thanks for the response. The problem I'm having is my 400ex won't idle when cold. I read that it should be jetted to a 42 pilot jet.
Using that kit should put you on the right track. Sounds like the jet is clogged.
is there a washer before the o ring then the spring? on the air fuel needle? thanks
www.partzilla.com/parts/search/Honda/ATV/2007/TRX400EX+A/CARBURETOR/parts.html
I'm guessing you are talking about #6 on the diagram. So it lays out the order in which everything goes.
wicked thanks alot this helped!
Do You Have To Completely Take it Apart Like That If You’re Just Gonna Spray It Out ?
Depends on how deep you want to go. Most times, it's not necessary for a simple carb clean.
No but if you have it out and have a kit might as well go over everything best time to check shit is when it’s apart I probably wouldn’t fuck with that throttle body unless you need to adjust the needle or it’s dirty though
Mine has a plastic piece thats in the bowl but idk how it goes back do i need it?
I'm hoping you're not talking about the float. Here is the diagram, which part are you talking about?
www.partzilla.com/catalog/honda/atv/2007/trx400ex-a-trx400ex/carburetor
This is too much for me :( My 400ex won't start and I know it has to be from a gummed up carb. It's been sitting for 2 years. How much would it cost for someone to do this for me? I also have like none of those tools
It's 124$ to buy a new carb and all you have to do is install it yourself
Bobboy 235 Thanks man. I might just do that.
great video thank you. How can I get one of those D driver for the air/fuel mixture screw?
www.partzilla.com/parts/detail/aftermarket/XP-4815775.html
That should be the one!