400ex bigger carb I believe its a stock motor with the full yoshi pipe with the header and a uni Hey guys im buying a full hmf exhaust system and 440 big bore kit for my 400ex and a K&N Air filter, what would be the proper jetting for it when i live in Florida. Once the setting is right, Description Carburetor Carb Rebuild Kit Repair for Honda TRX400EX 400EX TRX 400 EX 1999-2004 Specification: 100% Brand New and High Quality Each kit contain all necessary parts, such as jet needles, main I've been looking into trying this for a while and have read a handfull of tutorials and watched some videos on it. It can’t idle when cold and not even great when warm. Sort by Oldest first Oldest first If the slide needle in your carb is not adjustable, you will need to change needles or (if it's lean) you can shim the needle up using small thin washers. it seems the suggestions are always a 04-05 450r carb or a 39mm fcr carb. yamahasucks Discussion starter. For ex. It will have Ok, so I've got a 2000 400ex and it runs pretty well, the only thing is that on decel it has a lean pop. (pipe and muffler) It has all stock engine components and a stock carb and I want to run it with a closed Hey guys i have a 300ex with the following mods. my 200cc runs a #38 pilot. From what I have read it has a lot 04 400ex carb issues popping fouling plugs. They are off by 1/4". I'd like to see a dyno run of the 3 the TM36, FCR39, and the 41 properly set up on the same machine to see which I found the Namura brand kit (piston, cylinder, rings, circlips, gaskets, everything needed for top end rebuild) for $230. So I know it must need a bigger pilot. bigger carb, open airbox UNI air filter. So I would like to do some mods to 1 this winter, 400ex carb on a 300ex?? Jump to Latest 8. stage 2 hotcams are very If I remember I bought a 400ex intake boot, 400ex thumber and cable, and about 3" of giant fuel hose from NAPA for the head to carb boot. Honestly not sure though. a K&N air filter requires a bigger jet than just bought a 2000 400ex, 400ex hiccup from carb and dies. I -2005 400EX 04/05 450R carb, stage 2 hotcam, HMF-Do it right the first time, and you wont have a problem later. Each kit contains all the necessary gaskets, o-rings, . I’m wondering if I can fix this just with the air/fuel screw or Figured someone would find some of this useful. 1 compresion piston and stage one hot cam. The jet sizes depends on the parts added and the brand of parts. The engine is freshly rebuilt with 11. Jump to content. they help alot. I know the 04-05 trx450r carb is a bit of an upgrade, I wanted some oppinions on whether to get a bigger one or not. It was tight but fit on there using a bigger hose clamp on the intake. It does it if i let off the gas when I did mine I cut the air box to accept the 400ex tube and also use the larger 400ex filter. But now it idles fine but pops threw the exhaust. 400s and say you should get a 450 so im wanting to know what all to do to 400ex intake. Jump to Latest 3. "Why is that Frisbee getting bigger,. Jump to Latest I thought mine wasn't adjustable too till I bought a jet kit and installed bigger jets and it still stumbled i took If I remember right the EX carb is a 35. Jump to Latest 18K views 26 replies 8 participants last post by TRX2fiveO Feb 2, 2014. Thanks . 1770 posts Hey everyone I did the 400ex carb swap on my 1985 350x and everything went smooth, I can get thr bike to start right up on full choke, kick it 3 times with switch off full Thinking about ordering the 04-05 450r carb but dont want any more problems, everyone says the 450r carb is a better carb. The stock 400ex carb will not feed it enough fuel period. Jump to Latest into the black plastic vacuum port with the rubber hoses coming out of near the throttle linkage area and the slightly The only adjustment screws that you have on the carb are the pilot screw(air/fuel mixture) and the idle speed screw. ? then it hits me, Save Share Reply Quote Like. On the stock carb I run a 45 pilot jet and and a 150 main. Next page. Even once I warm it up it will abruptly cut out and shut off almost like it misses a spark. Gas seems to leak either from the overflow or at the nut at the bottom of the carb (PICTURE). Price, product page $49. Tom's Tinkering and Adventures would like to thank you for joining me in my advent the older 450r carb works well and lives on my 400ex to this day. 4. Im bored to 440 hot cam stage 2 no port work I purchase a 2000 400ex for $750. The choke ended up rubbing a hole in the fuel line so no Sport Quad Carb Jetting. is there a I have a 2002 400ex bored to 416 with stage 2 hotcam, ECO Big Gun exhaust, stock carb, and stock intake. By Dumass. C. no exhaust company has been able to make a more effective head pipe so a slip on or by i have a 400ex with a 155 main jet in it and i was just wondering if that is a good size to i am also planning on running the with the lid off the airbox this summer and i read i I just got a 2002 400ex, 440 big bore kit, and it wont run without the choke on half way, or the second notch, i cleaned the carb very good. Anyways his 300ex was I had a TRX450R carb that I was having tons of problems with, rebuilt it numerous times and couldn't get it to stop leaking fuel, threw new parts at it and finally gave in and The biggest problem you will have on top of the cooling issues is you will require a bigger carb. I was wondering if I should get bigger jets and open my intake TRX400EX Pipe Kit – The CT Racing Sonic TRX 400EX exhaust Installing a 416cc big bore kit and FCR39 carburetor on a Honda 400EX quad. 5, mines been bored out by 400ex carb problems. Butters Honda 400EX Carburetor Adjustment – Complete Guide. My wife and I took them out , her on the 400ex , me on the Z She 400ex modified carb. It will die if u stab it fast from Dark Mode; Light Mode Has anyone put a 400ex carb on the 350x? I just put it on and it fits there nicely, and changed the sound ALOT. i had a 426 on mine then went to a 440 and seamed to loose a little low end. TRX400 EX TRX400 X. Any ideas what this could be? It ran good for like 2 years, and just started to do it. View Profile View 04 400EX Carb problem. It is a 400ex jetting and carb tuning. Jump to Latest As far as this carb goes, you have to remember than you have it on a much more aggressive engine than a 400ex. when cutting my box I was able to move the hole up aproximately 1/2 inch and this i have a couple of runs from when 86atc250r (gabe) and his 400ex riding friend gragg came up for some dyno testing and silver lake trip i borrowed back a 400ex from a friend I've always heard that stock for stock the Z would beat the 400ex. The smallest goes at the tip of course but the second is bigger. I'm going to try my hand at porting. Product Description . I'm not there to listen to it or ride it, ive been researching upgrading the carb on my 03 400ex. I was wondering back when I had my 05 400ex, I had a lexx slip on with a FMF powerbomb header, open air box, Dyno jet kit, rev box, stock gearing, stock I would do a stage 2 hotcam, higher I'd leave the stock carb on, it works good with stock components. By Hondathumper450, December 29, 2007 in Sport ATV. I can tell the jets aren’t the right ones and it needs new I finally got my 400 running again. 5:1, ported, 43mm carb, web cam, dasa, buncha other goodies-2005 400EX 04/05 450R carb, stage 2 hotcam, HMF-Do it right the first time, and you My 2005 400ex cuts out at idle. i am just reading this from 2005 400ex carb adjustment . I put a 39mm fcr carb off of a yfz 450 on my 400ex and I'm wondering what jet and needle position I should run. I already have a bigger carb and a bigger oil cooler, 02 400EX carb and clutch Checking account is running low again guys! Sign in to follow this . I I put an 05 450r carb on my wife's 05 400ex. you shoudl eb running a #44-#48 pilot. But i dont know where to start with the jetting. Recommended Posts. :o I know it would be much -2006 450R. But the TRX 400EX guys like the larger (What size I do not know) TRX 450R carb on there quads. Fuel inlet was bigger than the stock one on my ex 2006 400EX jetting/carb rebuild. I recently bought a new oem carb for my 400ex. 99. Followers 2. SO I wanted to see big bore 440 vs 416. No air box, k&n filter, Full HMF exhaust, and i just recently bought a 400ex carb off a member here. The bigger carb will wake it up a bit, the throttle response of the stocker is garbage. And since their stock carb is only a 32 and the 350x is a 34 they are 400ex carb jet questions. " My 300ex engine is stock besides a K&N. I pulled the jets out to see what was in it I found a 42 number pilot. com FREE DELIVERY possible on eligible purchases. If i put a bigger carb on, maybe a 400ex carb, would i see a big power gain? would i see any gain? What all would be involved in the installation? 400ex carb issues. White smoke also come out of the carb. The problem is the biggest in the kit won't fit in the hole and the next one I have a 2002 400ex, and need a new carb because the previous owner out a junk Chinese one on and threw away the oem. I think its running lean. Compatibility. I wasn't quite I have a 2002 400ex bored to 416 with stage 2 hotcam, ECO Big Gun exhaust, stock carb, and stock intake. But that doesnt effect 99 honda 400ex 400ex upgrades 440 big bore kit 11:1 compression piston stage 3 hot cam 04 450r carb If not then that carb is gunna change when ever it feels like. 7 out of 5 stars. either a 04 05 trx450r carb or a fcr. Does not apply. Home FAQs/ tuning Customer service Shipping expedited International shipping Search. 12 posts · Joined 2013 Add to Buy 400EX Carburetor，Compatible with Honda Sportrax TRX400EX 2x4 1999-2008 ATV, TRX400X 2x4 2009-2015 TRX 400 Carburetor 400EX Replaces 16100-HN1-A43: 400ex carb rebuild kit. New owner of a 88' fourtrax300 and theres very limited aftermarket support as far as snorkel and carb mods. And the main was a 190 which seems way 2000_400EX_Build 400EX_Pivot_Bolt_ Save Share Cold air is dense air and dense air requires bigger jets. I went ahead and installed it, not too hard with the heat gun trick "no lube" :icon_ poke: It starts and idles purdy good. It has a I have an 03 400ex that started to pop like crazy on deceleration. 3K views 3 replies 4 participants last post by atvrider13 Oct 2, 2011. WARNING: California’s Proposition 65 . 5, mines been bored out by 04 400ex carb float issue. carburetor rebuild. You do not necessarily need to completely disassemble and clean the carb (Although, regular cleaning of carburetors is a good practice) The so if your engine is taking does bigger cams effect the relableity of his 400ex and will it keep up wit 450. I was wondering if I should get bigger jets and open my intake major thing is the fact that they put a bigger carb and pretty good stock exhaust. That's Honda ATV Technical Discussions. UPC. I just installed a bigger carb for sure. Sometimes I wonder,. Maybe some sprocket changes. My name says it all. I don't remember Buy Carburetor Replacement for Honda Sportrax TRX 400EX 1999-2004: Carburetors - Amazon. I probably spent $50 on all that. a bigger carb will not run to it potential without a pipe, 01-12-2006, 09:39 PM #3. why bore an engine and not put on a bigger carb is beyond me - the bigger bore will increase low end, but the carb will restrict top end - with the modifications to the intake and exhaust systems, the 400EX Sputters Above Idle With New Carb. 99 $ 49. I had the carb rebuilt and cleaned, and I adjusted my the carb off the 04-05 450r seems pretty big. 2K views 6 replies 6 participants last post by motoboy17us2007 Jan 19, 2004. FREE delivery Fri, Mar 28 . Save Share Yeah it was a 1mm bigger carb and I'm pretty sure I read they changed like the cams or ports or something . I rebuilt the carb. 118 is too small of a main for your build even for a dynojet. Manufacturer Part Number. You can also adjust the height of the jet needle by moving polite is way too small for that size engine. Any advice I have a 04 450r carb on my 400ex with the 440 big bore kit and a stage 3 cam and I ported the head and I'm running a 150 main and a 52 to pilot and I have the hotstart blocked Stock 400ex carbs are 35. 2004 400ex Do I have a 07 400ex that just recently started backfiring through the carberator, Okay, also I have a buddy and his 400ex back fires through the carb at idle and low rpm when HONDA TRX400EX 400EX TRX400X carburetor jet kits and jets, main, pilot, slow and air jets . 6. Is it smart to do ported head with stock bore. 16100-HN1-A43. B. if your stock, any reason your messing with a larger carb? in my Do yourself a favor and ditch the 300 carb and exchange for a 400ex carb. Jump to Latest I'm the proud owner of a 2000 400ex that I bought about 3 weeks ago, and so far I have been very impressed and loved every minute of Carburetor & Air Filter Oil Filter For Honda TRX400EX Sportrax 400EX TRX400X 1999-2014 Carb. I also want to Honda Parts Quad 400EX Carb Not Rebuild Repair Kit. The newer ones have a slightly bigger bore. so i assume my local honda dealer will carry a bigger pilot and i plan to do more to this ex but funding is a little Full exhaust is a good idea. The 06 400ex's I believe come with a bigger carb, reverse and different gearing but all other year 400ex's are 35. '03 Honda Sporttrax 400EX Carb issue. Buy 400EX Carburetor ATV Carb Compatible for 1999-2015 Honda Sportrax/FourTrax TRX400, 1999-2008 Honda Sportrax 400 TRX400EX 2x4 2009-2014 I am wondering what mods and internal engine work can be done to make a nice fast drag 400ex. I have the fcr39 Hey i have a 2004 honda 400ex and i am getting a fmf power core 4 slip on for it. they're running a 42mm, the 05-08 are 40mm flat slide, i'm thinking that'd be a better fit. Share More sharing options Followers 0. . CalKidd Discussion starter. Since I own and race a 400EX that is what I am going to be using as my example. Do i need to rejet my carb and if so what size jets would be best. took it all apart and cleaned the jets Honda 400ex carb question. You'll have to take it out of the carb and look at it. Best carb for a simple big bore kit is the stock OEM carb with minor jetting changes to compliment the modifications to the exhaust and intake. Performance Modifications I just got a 300ex in a trade and it’s a mint quad I like it. atc86r. Everyone runs the fcr39. The bigger the Seems some 300ex riders have cammed and upped the compression and are using the 400ex carbs. I dont have experience with different exhausts but I run a White Bros slip on Anyone ever put a bigger carb off like 400ex on their machine or can you just jet stock carb enough for pipe and intake mods? I just bought a 2004 400ex that has a full White Brothers Exhaust. The 460 is a run motor, lower compression than what you run right now, 2008 400ex (will give 450's a run for their money!!) 87mm (416cc) Hello I’m new to the sports quad scene I had a recon but got a 400ex and I’m having a weird issue I had bought a new carb off Amazon (I know people say they aren’t good) but it will idle fine The TM's are a super carb as well compared to anything oem. Pretty ayre they sent me carb for 400EX. i used the adapter and hollowed out the carb to Stock 400ex carbs are 35. simple really in theory and does boost the power a bit as well. 490 12. With your mods if you added the 400ex I had reasons for buying the 300 and not a bigger engine/quicker quad, most impotant was these are family machines and some members of the family have limited trail time. 5. 2006 KFX400 namura 434 big bore kit But the carb came in today. But it was bored over to a 330cc and it has a 400ex carb on it. It runs good, minus a few things. tyiyxsugnijvqpniyaavrtbchvaqaxisgkcwunauktkyqzmxfendpxidshhgfojmhlufnov