know that spring is a pain when the cable is worn a lot too. Troubleshooting - backfire through carburetor. It's safe to say it now runs worse than when i started working on it 2 days ago. Going to try putting a friends 400EX carb. Run your PCV hose from the valve cover to the intake manifold under the carb if you haven't. A backfire is back through the carb, a whole 'nuther problem related to timing issues. i have a steady stream of carb cleaner throuh the pilot screw hole. Carb Engine backfires when I shut the car off ***Carbed Car*** [Archive] - DMCTalk Forum - A DeLorean Community Backfires when starting. The stock carb when properly jetted works well on the top end and so does this carb. Best Mouse Trap Ever, How To Make Bucket Mouse Trap - Duration: 10:59. Page 1 of 2 1 2 Next > Kloque, Nov 15 Heard of it. Rejetting is a repetitive process in which jets are swapped in the carb until the desired A/F (air to fuel) ratio is obtained. NOW . I have a 351 Cleveland engine that just wants to backfire through the carb. Since then my carb has been sounding like it is backfiring. Turning the engine over with the starter for a minute or so may empty the float bowl but it might cost you a new starter motor. a backfire through the carb can only be caused by a serious misadjustment in timing. It offers the highest V-Twin compression ratio on the market. How to Fix Engine Backfires . Can anyone help or at least give me some direction. This is not to be used as a manual for any specific carburetor, as every carb is different. com - Duration: 22:35. The first step is to remove the MAF sensor and clean it using carburetor cleaner. ask. The valve is spring operated and relies on vacuum upon throttle closing to close. 400ex backfire through carb Benefits of entering VIN/HIN? Monday through Friday . Backfiring through carb, power surging, some backfiring through exhaust. Re: 400 ex smokes That is exactly what happened to my 400ex before i seized it. The power is transmitted through forged-steel connecting rods and a forged-steel crankshaft, supported by a full-pressure lubrication system. it would take the timing being out by about 180 degrees for this to happen. Try closing the fuel petcock before you are pulling into the gas station to drop the fuel level in the bowl a bit. Too much fuel is delivered, resulting in unburned fuel in the exhaust. Highly recommended I have a 03 400ex? The finer dust would blow through as normal, but the The dealer removed the airbox lid, put a K&N and outerwears on it. GucciBenz 8,209 views · 1:17 · 2008 Suzuki M109r Boulevard For Sale - Duration: 4:00. what can be causing this? i just bought it, it had been sitting in a guys backyard for over a year by the Bought a 2000 400ex, all stock. 2004 Honda sportrak 400ex quad, Carburator diagram & adjustments. causing the backfire. 02-21-2019 04:25 PM by Here 2 help. 040 over 440 with match port eddy heads and aggressive cam. Teryx Belt Deflection Test. You search Auto repair manual PDF carburetor adjustment on a 400 ex, if there are search results will appear below. load. Page 1 the carb is rich and the sparkplugs are new, can this be caused by a too rich mixture, or should i look for something else? Retarded timing will cause backfiring through the carb. Edelbrock is the most respected name in performance. this vacuum drops and the amount of fuel drawn into the engine through this Find Edelbrock Accelerator Pump Assemblies 1470 and get Free Shipping on Orders Over $99 at Summit Racing! When doing a rebuild on your Edelbrock carburetor, don't forget to replace your accelerator pump with one of these top quality replacement pump assemblies. Honda 400ex atv carb rebuild cleaning partzilla com youtube" Finally a Canadian Business that doesn't use a stupid Shopping Kart! Thank you for your personal approach to business! I appreciate that I was always dealt with professionally with a live person through email and by phone. I changed the plug, put in fresh 93 octane gas, checked fuel flow, checked for a sheared flywheel key, and adjusted the coil gap. The rebuild consisted of a new wiesco 10:1 compression piston and 4 Jul 2015 Honda - 03 Honda 400ex backfiring through carb - so on my quad it starts and idles perfect. Came back home 3 months later, charged battery, fired the beast up, same symptom, ticking, then popping thru carb under power. Electrical & Ignition. inthemud450 is offline Thanks guys, I'll try a filter and outer wear. & then die. I set my valves about once a year if I ride alot. In no way am I responsible for the adjustments, or their results, you make on your own machine. the engine ran fine on initial start up but original carb leaked gas . 2000 400EX blowing oil out exhaust I have a 2000 400ex that I race and she's the same waywe warm the quads up before we try to start themlike this morning 07 honda trx 400ex pilot screw adjustment. My car was doing this also. after I got the few minor carb issues worked out, it runs like a scalded dog. pilot adjustment. points, condenser, distributor cap, rotor, spark plugs and 2010/06/26 · 1988 Yamaha 350 moto 4 backfiring through carb Facebook; Twitter; YouTube; I need a Honda 400ex engine. Turning the fuel tap off will stop the fuel going to the carb. Sat 4 almost a year, took old fuel (as much as i can)out & put in new 91oct fuel. Starts and runs but backfires through the intake at idle. I've been through the search feature, one by one, and I've checked/fixed/replaced things based on those suggestions. 31. Backfiring is a small explosion. I have swapped ignition coils, icm box, and those didn't fix the problem. Why does an engine backfire through the carburetor? Answer . time to find the leaky plumbing. I have a 1988 350 moto 4 that starts and idles great. You can hear the combustion as a mild, cough-like ignition or a loud bang. Topic: backfiring through the carb Posted By: QuietWater on 08/07/10 09:52pm I'm finally trying to get my old 1984 Holiday Rambler Imperial ready for Labor Day. Twice the motor backfired and pushed the rubber sleeve that Dec 21, 2000 Which sport quad will hang with a built 400EX? A K&N Air Filter with a vented box, carb jetted with a 152 main and 45 pilot, a complete ECO series is for the price-conscious rider that wants to get every ounce of power out of his/her motor but does not want to break the bank. Been through the Carb numerous times with cleaner, fine wires and compressed air all with no changes. Pilot Air/Fuel Screw Adjustment  Yamaha Warrior 350 backfire - YouTube www. It has a stutter at low rpm. I&#39;ve cleaned Backfiring through the carb after rebuild Facebook I completed a rebuild of our 99 400EX because it smoked like a 2 stroke. [ Engine 2007 Honda TRX420TM/FM FOURTRAX RANCHER 420/4 4 OWNER’S MANUAL FOR OFF-ROAD USE ONLY This vehicle is designed and manufactured for off-road use only. com/youtube?q=400ex+backfire+through+carb&v=nVpV4zBKYrA Jun 18, 2013 Honda 400EX ATV Carb Rebuild & Cleaning | Partzilla. Here is a link to a quick video I took. K&S Technologies Carburetor Air Cut-Off Valve Set 56-1008 (backfire) when decelerating Mikuni Super BN BNI Jet Ski PWC Dual Carb Carburetor Primer Kit Sea Doo Obviously, installing an aftermarket carb will require tuning, but so will changing to a different air filter. if it backfires on deceleration its lean if it pops on acceleration its running rich. The car is backfiring through the carb when running in the garage, or under a light/med. The air cut valve shuts off air to the idle circuit during deceleration (enrichening the mixture) to prevent backfiring in the exhaust. I figure since the plug was completely covered in black soot the valves and piston probably are too. NOW for the trick. Posted on Sep 26, 2009. Note: Backfire and afterfire through the carburetor will not harm the engine at all! Find out the most common causes and possible fixes for engine backfire and afterfire. An engine backfire is an explosion produced by an internal combustion engine. Gasoline that contains alcohol has a tendency to ignite easier, plus cause the engine to run slightly hotter. The backfiring is because the exhaust valve can't open, so when the intake valve opens again, the fire comes out the intake valve into the intake manifold igniting the air/fuel in the intake manifold which then pops out through the carburetor Shutting off the engine at high RPM. If search results do …2016/04/28 · - - 400ex Backfiring, no clue. Blackpony is offline Quote Quick Reply. ? I have a 06 raptor 350 and recently i added a jet kit and a pipe. Could be lots of reasons for back firing through the carb - my guess is you have an intake valve opening a the wrong time, a intake valve that is stuck open or a burn intake valve. I just had the exact same thing happen to me. See our Performer Series Carburetor. it only does it when it is idling and at low speed cruising. Since the intake valve needs to provide the engine with a proper balance of fuel and air, a backfire occurs when that balance fails. RMK 700 carb question clean the carb out and if that doesn't work it's a lean backfire! So rejett 2002 400ex it has a 440 big bore kit and bored out to a 448 Hesitation and backfiring on sudden acelleration when warm. 15-17 characters, letters and numbers only. i,ve cleaned everything 3 times now and it still idles with choke on and shuts off as soon as i turn the choke off. 2001 Honda 400ex Carburetor. The smoky exhaust indicates an inefficiently performing engine. com/youtube?q=400ex+backfire+through+carb&v=eeCPx_40bgc Nov 17, 2013 400ex backfire through carb Help - Duration: 1:17. Will start run for a few sec Backfire is a condition described as a loud bang, poof, explosion, etc. 6) Pull-off diaphram blown. Loading Unsubscribe from Daivd Ives? Honda 400EX ATV Carb Rebuild & Cleaning | Partzilla. It would do it once in a while when going around a corner. Probably old gas and sludge in the carborator. ? I have a 06 raptor 350 and recently i added a jet kit and a pipe. Partzilla 105,733 views · 22:35. Re: Onan CCK backfiring through carb. I have 2 400s. careful not to cut all the way through (Picture Fig. Great fit and keeps all the dirt and dust out of my carb and motor. i just cleaned the carb on a 400ex and when i fired it up it rev'd up high. - ATVConnection. Been there, done that. Cars Maintenance & Repair Basics Buying & Selling Reviews Tools & Products Classic Cars 2006 Honda FourTrax Rancher™ 4X4 Reviews, Prices and Specs. 400ex backfire through carb. Backfiring through the carbs can mean that air/fuel mixture is "reverting" because the on overlap (when both the exhaust and intake valves are open)exhaust pressure forces the intake mixture back out. Dont bother in a fuel system, run seafoam through it instead if you want a cleaner. I brought engine to TDC, and rotor lines up to #1. I went through the carb and everything looks to be fine. 0. In fact, one should expect a well-tuned high performance engine to "pop" and "crackle" when the throttle is closed at high rpm. ) this carb makes approximately three more horsepower than the stock carb. I recently had the 2 barrel Strommy fully rebuilt ( 3 times in 3 weeks) on my HQ GTS 253. Because of their great performance they come stock on a lot of the leading brand bikes. A strong explosion, though, can cause severe damage, like cracking an exhaust manifold. Add to Wish List Add to Compare. Or popping and spitting occurs through the Just got an 02' 400EX, and have some problems Yesterday, I traded my trail bike, an 04' KX250, which was getting a little worn out, and needed plastic, for a 2002 400EX even. By JStricker. Removed screw under carb & cleaned & placed back - clean & new motor oil. The next area for fuel control is the carb float needle. I've been through the search feature, one by one, and I've checked/fixed/replaced things based on those I installed everything out it back together and it back fires through the carb at a fast idle but doesn't do it when the choke is on. With these features you can take advantage of Keihin's superior performance. #19. baney8184: Stihl 041 AV lost power, backfires through carb. Ill take pics of the old piston tomorrow, but it turned out to be a scored cyliner and bad rings. which will sound like the engine is sneezing back through the carburetor. , while the engine is running or while shutting down. 2002 Honda 400ex Running bad poping and backfiring? Ok so I had my 400ex taken to a mechanic and he cleaned and supposedly tuned the carb. The engine while running better is still backfiring through the carb on acceleration. Deepak - July 13, 2009. com/youtube?q=400ex+backfire+through+carb&v=STJZiDiW2xA Jun 2, 2013 Okay so after a fresh rebuild and a little adjustment to the carb it was running and had ridden it for a week. Honda TRX Forum > Honda TRX Tech Garage > Maintenance / Important Information > 400ex carb problem Reply. I'm guessing it needs a change. No more poppin Air/fuel are on front of carb low on right and left, basic start point from seated is 3 turns out. But I guess we can add fouled plugs to the list of things that can cause backfire on acceleration Repeat steps 1 through 9, as necessary. Kloque Adventurer. Got a honda 400ex runs but backfires and the plug is all wet?? This will fix your 400ex. Username. i pulled the throttle cable back out and put it back in and it ran fine. Real backfiring is actually the bike "spitting up" in a sense, backwards through the carburetor or intake. 2001 Honda 400ex Carburetor. Why does a Datsun backfire after acceleration already replaced the plugs wiresdist capdistributor coils after the choke kicks off it will not take the gas it spits and sputters and backfires loud? I just rebuilt it and cleaned my carb while putting it back together. Tried spraying WD-40 around the carb for a vaccum leak and did not find a leak. FMF is a little bit quieter that the stock 230 muffler with the baffle removed, but allows the little engine to breathe SO much better (especially after re jetting the carb). 400EX, TRX450R, YFZ450,etc. " Would this suggest that running the engine with the carbs exposed, or running it with pods is in fact causing the issue because there's too much air getting in? The passage through the carb body/nozzle stem was definitely obstructed, took me a long time with compressed air,wd40,dripping carb cleaner down the passage, and more compressed air but I finally got a stream out of the tiny nozzle hole. I am working on my 1973 ford galaxie 500 it has a 400 big block and for the most part it runs fine but when you really put your foot in the gas it hesitates and backfires through the carb. HONDA TRX 400EX Removing Stock Carb and Cables INSTRUCTION 0. Backfiring through the carb after rebuild Facebook I completed a rebuild of our 99 400EX because it smoked like a 2 stroke. A couple of weeks ago one of my injector plugs flew out when it backfired and I would like to see if there is something I can do to prevent the backfiring. 2004 Honda sportrak 400ex quad, Carburator diagram & adjustments. Pulled valve covers and started it, #2 intake valve rocker arm not moving, at all. I turned up the idle screw a bit and it stopped backfiring, unless you tried to choke it, then it would backfire. Why Does a Car Backfire Through the Carburetor? Car backfires through the carburetor are sometimes caused by a lean air/fuel mixture. com - Duration: 22:35. HELP PLEASE Spitting gas from carb - posted in Tech Talk and How To: My outty 400 has been sitting for several months because my son blew out the primary clutch & i had to save to buy a new one. I'm an auto-mechanic by trade, and I've had 2 stroke bikes and jetski's throughout my younger years. Threads Tagged with backfires. " Finally a Canadian Business that doesn't use a stupid Shopping Kart! Thank you for your personal approach to business! I appreciate that I was always dealt with professionally with a live person through email and by phone. The backfiring through the carburetor (the coughing or spitting), on the other hand, frequently happens in the morning when the carb’s air/fuel mixture is too thin. The backfire is produced when unburned fuel ignites inside the intake or exhaust manifold instead of a cylinder. Similar for the exhaust. Fuel burning in the exhaust causes the backfire. ATV Rider may receive financial compensation for products purchased through this site. 1 Attachment(s) 400ex carb. 03 Honda 400ex backfiring through carb. I know nothing about honda engines, but I'd start by checking the valve clearenace. I'm guessing it needs a change. - - slight backfire, please I have an 04 400ex, I just got it about 1 month ago. Can Am Renegade 800, 2007, engine rebuild kit. However, this may not last long, a good one blast on that moment is all that it takes when the engine is totally warmed up. Backfiring from the exhaust when DECELERATING is caused by a lean pilot circuit and is actually called afterfire. My question is to jetting, I don't think the dealer did any! It starts pretty hard, takes full choke then likes to backfire through the carb until it's really warm Find resale prices for tractors built from 1939 through today, with complete specifications and serial numbers. If the engine runs too rich throughout the mowing process, the evidence will show on the spark plugs. The car was backfiring with the old engine as well, so I thought it was the old carb causing the backfire. So, the two part answer is, yes, with a build up, a backfire caused by vapor buildup is possible but, the more likely cause of a backfire is from an improperly set rotary valve. Search the site GO. I have a 07 400ex that just recently started backfiring through the carberator, it mainly does it when it starts cold at idle and only running lean can cause your 400ex to backfire . Here is a link and the verbage for setting the pilot. In most cases these problems are fixed through simple adjustments or minor repairs to the fuel or ignition system. ive had the carb. (Backfire through carb and spit all over). Backfire through the carb Honda Motorcycle Carb Adjustment Tips. CALTRIC Carburetor FITS HONDA TRX250EX TRX 250EX SPORTRAX 250 2001-2005 w/Throttle Cable With old carb the ATV was really hard to get started and wouldn’t stay Enter your VIN/HIN to get VIN/HIN-specific recall information. Before I put the car away for the winter last year, it started to hesitate upon acceleration and backfire every so often through the carb. If this timing is mis-adjusted it can cause low power, poor gas mileage, engine detonation (pinging) and backfiring through the intake or exhaust system. Backfiring through exhaust at idle If this is your first visit, be sure to check out the FAQ by clicking the link above. Partzilla 112,049 views. Engine Blows Oil Out Of Dipstick Tube. I don't know what else to check. I took carb off and cleaned it even though I just cleaned/rebuilt it a couple weeks ago. It backfired so badly that it blew the boot apart that bolts to the cylinder head. How to Diagnose Engine Backfires. The exact symptom is popping through the carb when cold (choke on) and what feels like a miss. I have to turn the air fuel idle mixture screw down two and a half full turns before I can start 62 pan. Get the latest Honda FourTrax Rancher™ 4X4 reviews, and 2006 Honda FourTrax Rancher™ 4X4 prices and specifications. running lean can cause your 400ex to backfire . com atvconnection. Pull the jets and clean them til you can see perfectly through help guide you through every workshop overhaul procedure. This can occur due to a faulty intake valve or intake manifold that's causing extra air to leak into the system. Backfires may also be caused by a leaking hose, faulty plugs or the brand of fuel being pumped in. You will need to block a couple of the outlet holes with your finger while spraying to force the cleaner out of the other passages. Does the carb have vacuum secondaries? If so, check the spring that holds Motorcycle Jet Kits & Carburetion Basics. Possibly damaged by a backfire condition. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. 5 Attachment I have a 2003 arctic cat 400 manual and it backfires through the carb when it is idling. I have a honda 400ex atv. but still backfiring. I've replaced piston rings, spark plug, valves, gone through the carb. Rebuilt the carb last night and still same thing. I just hate the idea of rejetting after seeing all the posts of people having troubles getting Tuning Your Carburetor For Optimal Performance And Fuel Efficiency. Backfires are caused by lean conditions or incorrect ignition timing, however if it pops back through the carb, you have an ignition problem. Then the engine revs like mad until I can turn it back. Power valve blown. once you start riding it, it makes a little popping 6 Mar 2009 Honda - carb keeps popping on 400ex - hey new to the site and was aye? like a hesitation/cough at low throttel or idol? or a backfire?6 May 2003 Honda - 400EX popping through carb - A friend has a 400EX. 400ex backfire through carbI installed everything out it back together and it back fires through the carb at a fast idle but doesn't do it when the choke is on. I just had to adjust the squirter linkage, and it stopped Hard starting and backfire thru carb. Right off of idle, somewhere in the*900-1000*RPM range it seems to backfire through the carb into the air box. Increase the size of the main jet. Honda 400ex atv carb rebuild cleaning partzilla com youtube my xr400 did that for a little while right after I bought it. got a honda 400ex runs but backfires and the plug is all wet?? the quad has k&n air filter,stage 2 cam,fmf - Honda 2001 CB 600 Hornet S question Honda 350 atv will not rev backfires through carb easy started idles perfect but not rev up. 1813. It idles great and if I go into the throttle easy it will do good, it starts to cut out and backfire when I get into the throttle quick. replaced 318 with 440 . You might try disconnecting the AIR pump belt and/or the gulp valve small vacuum hose and see if the backfire abates. To determine which cyl is popping pull a plug wire 1 t a time and immediately get I did a search and found a comment stating "If the engine backfires through the carburetor, misses, cuts out or quits running, the main jet is lean. 01 raptor backfiring through carb. Troubleshooting - backfire through carburetor By: Bill Tichenor 12/02/2009 < Back to Blog Home Footage taken from Holley Carburetor Installation & Tuning DVD 98 polaris sportsman 500 backfire through carb? If this is your first visit, be sure to check out the FAQ by clicking the link above. I milked it over the summer and figured I would look into it over the winter. so i figured it was about time to  Backfire is blowing the carb off the intake. Are you sure the timing is spot on Bike idles perfect, but dies when given the slightest amount of throttle. I also messed with the idle and the throttle cable adjuster up on the handlebars. XRs Only Honda TRX400EX XR400R HRC Copy Cams is often touted as the best in the business, expanding horsepower and torque throughout the entire powerband, from low RPM through the mid and into the upper echelon. carburetor adjustment on a 400 ex. Air cut valve: I don't know if this has gone bad, and don't know how to check if it is working properly. *** If anybody sees any mistakes I may have made, please let me know through a PM or a reply. Grab a can of carb cleaner remove the carb and float bowl. She runs like a top now - a very very quiet top too Blessed silence. A lean A/F mixture (too much  400ex problem - YouTube www. 7) Carter Only . Replace the pull off. It helps protect you from infection by certain germs or bacteria which are called pneumococcus (pronounced "noo-mo-ca-cus"). I installed a new 650 Holley carb. You might be running a little rich when the engine is warm due to the choke hanging closed when the engine is warm or the carburator running rich. backfire through carburetor. With a little rpm it smoothes out. 79cc predator is backfiring out carb and exhaust won't start. Tweet Been through the Carb numerous times with cleaner Carburetor Set Up and Lean Best Idle Adjustment Start set up by confirming carb base line settings. Alan, go through the carb, set the valves and you're good to go. Is Your Car Idling Too Rough? Search. …What Causes a Car to Backfire? by Jason Unrau on December 02, 2015 It’s an exaggeration of how a backfire actually occurs, but it’s not totally inaccurate. If you want to change warm idle speed, use the idle adjustment screws on the front of the carb, underneath the fuel bowl: 3079 (Those screws are bypassed when the engine is cold because the fast idle screw is cracking the throttle plates open). Re: Backfiring through Carburetor in reply to Phil Simmons, 10-10-2007 16:15:29 Intake valve maybe be stuck and or the carb is set way to lean or you missed something in the carb making it lean also. 5) Replace the power valve. I've messed with 7 Feb 2010 I completed a rebuild of our 99 400EX because it smoked like a 2 stroke. I cleaned out the carb, removed the tank & drained & cleaned. Re: Is your 2-stroke BACKFIRING? This could help good to know did a rebuild and was at a loss for parts to replace with something major, was thinking a bad install but knew myself better than that. but mostly in the oil. base gasket off a few times and noticed last time that you could see light through the layers when you hold it up to the light , i know that it is a crush type gasket so i assume its normal. 2008/01/24 · backfiring thru the carb Discussion in 'Engine Topic' started by mJolnir, Jan 24, 2008. Hi All Great site, lots of good reading, and helpful members! I have a 1990 YFM 2050 Moto 4 Quad with a new*somewhat annoying backfire issue. with different carb (which came off good running car) has backfire through exhaust when you give it gas took the valve cover off got piston up to TDC both valves closed set distributor to #1 position checked plug wires 3x's Now the car turns over and over then catches, shoots mist/vapor into the air from the carb, makes a terrible noise and wont run *screwed mixture screws into carb until lightly seated, backed out one full turn. if i turn the choke off and hit the throttle to keep it running it backfires through the carb. i have a 2004 honda 400ex with a slip on pipe k&n intake the carb is jetted to match. Checked timing and it appears to be accurate. 400ex 450r carb INSTALL TUNE exhaust Backfire lean idle fix. When a engine is hesitating it will cause the car to lunge or surge which will cause a sudden jerk as the car slows down. Sometimes hapens when the timing chain is getting bad, or if It was a chevy, maby the cam going flat. A backfire results in a temporary loss of power and forward motion along with a loud popping noise. Won't rev '02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe '04 Suzuki LTZ400 '16 RZR XP4 1000 - - 02 prairie 650 backfire threw carb If you are running it without the airbox lid on, it's guaranteed to backfire up through the carbs. A Kawasaki lawnmower engine that backfires on start-up has a problem with fuel delivery through the idle jet. </p> <p>Whether building the ultimate ra Also this motor ran 200- 250 hours w/ 6 volt system prior to the 12 v conversion. I have a holley 4150 carb. The right components will help to keep your carb working to it's full potential. 2). I can pull the vacuum line from the intake side of the Carb and it smooths out. com/forums/yamaha-side-sides/367792-backfire-blowing-carb-off-intake. I bought my boat last year and was never able to get the boat over 30mph which is when it would backfire through the carb. The problem the first workshop had was the engine backfiring through the carb. . Re: 400ex carb problem. Incorrect timing or plug wires My car was doing this also. Hi all, I have a Shelby Cobra replica with a 351W motor. com informational archive of Adjusting the Mixture Screws Don't push too hard or it will go through the plug and hit the screw behind it. . Sportsman 500 EFI backfire when throttle snapping. Re: backfire through carb Don't get sidetracked. Anybody get backfire through the carb? I might be crazy, but does anyone get an occasional backfire through their carb? That's where it sounds like it's coming from. a "cough" out of the carb is a classic symptom of a lean air/fuel mixture. The valve is carburetor adjustment on a 400 ex. Have put a new plug in it as well. If i ease on the throttle it will rev but it sputters and will backfire through the carb. Fire it up remove the air cleaner right back to the carb intake then slowly squirt an ounce of Marvel Motor Mystery Oil directly into the carb venturi. The vacuum line goes to the air cut valve on the side of the carb. 3 Oct 2004 my 400ex is backfiring through the carbs. a backfire through the carb can only be caused by a serious misadjustment in timing. Manual ATV - Online Shop/Service/Repair Manuals Download. Don't be a noob and forget to turn the fuel back on. If search results do not exist, please search by others keyword. 400ex 450r carb exhaust backfire and lean idle follow up Honda 400EX ATV " Finally a Canadian Business that doesn't use a stupid Shopping Kart! Thank you for your personal approach to business! I appreciate that I was always dealt with professionally with a live person through email and by phone. Carb Float Needle. 400ex cranking and starting problem - YouTube www. htmlYamaha Side by Sides - Backfire is blowing the carb off the intake. The manifold is not the problem. Then spray the carb cleaner through the pilot circuit. Thanks. Problem CONDITION POSSIBLE CAUSE CORRECTION 5) Ford& Holley Only . Keihin PWK carburetors is the dominant carb on the factory motocross machines. Once the engine begins to misfire, back the idle 4: Backfires in Exhaust Note: It is normal for many high performance exhaust systems to moderately backfire or pop when the throttle is closed from mid-to-high rpm. NFC007 Net Fish Cambo & Street Food 19,873,675 views This Site Might Help You. Timing dial in, big bump in jetting, vacuum secondaries and floats set correctly, and acc pump shot increase and she's starting to run like a raped ape. HolmenTree. Backfiring is the process of a spark plug, or multiple spark plugs, igniting the fuel in their cylinder out of turn, in a part of the combustion process where the exhaust valve is open on that cylinder. Why Is My 1973 Ford Backfiring Through The Carb. B-12 Chemtool® Carb, Choke, Search Berryman Products Search Products Only. The bike is stock except for the pro circut slip on exhaust. If it is a carb heat issue this should help. I'm in need of a replacement engine for my '04 400ex. Wondering if anyone has had any issues with backfires via the carb. NFC007 Net Fish Cambo & Street Food 19,873,675 views Bike ran fine when I demo'd it before buying, but when I got it off the back of my pickup truck, it would barely start, and then it wouldn't idle without playing with the choke, and then it would backfire through the carb. Backfiring caused by internal carburetor problems is a result of a defective accelerator pump. If you had a carb which has a stock jet size of 80 and you live or race at 2000 feet above sea level, then you would use a 99-08 Honda TRX 400EX 400 EX ATV Quad Custom Carburetor Carb Stage 1-3 Jet Kit TRX 300 EX Sportrax Custom Carburetor Carb also much more pep through mid and How to clean a gummed up carburetor on a motorcycle. Re: Backfire through carb under acceleration? UPDATE / another question If it has a Holly carb on it it has blown the econimizer valve in the carb. So No real definate cause can yet be scientificly determined. Wow, there are many things here that have potential to be the root of evil on the 400ex. Pump blown out. 400ex backfiring through carb I got new sprockets new oil pump gear and new chain and guides. Real backfiring means the engine is not properly timed and the fuel/air mix is getting a spark and ignition at the wrong time (when the intake valve is open). Removed screw under carb & cleaned & placed back - clean & new motor oil. Would this cause/worsen back firing? I can see some black packing coming through the core. On a stock 400EX carb (and many others) I use a 90 degree screwdriver. Advance it and you should be fine. 2011/11/16 · Backfiring through the carb? Please help Discussion in 'Thumpers' started by Kloque, Nov 15, 2011. So I adjusted the cam sproket one tooth and it shot me way past the timing mark. Check the float level on the carb. In my case, my stock six pack set up was way lean for the . You may have to register before you can post: click the register link above to proceed. Lean, backfire through carb, bad idle, 03 foreman S all i know is it is lean, backfiring through the carb and the header will get cherry red. that runs good on my quad and see if it does the same thing. If the engine is misfiring or backfiring through the air filter or carburetor system, fuel may be leaking from the carburetor into the cylinder. Log In. Small engine 101 says that backfiring through the carb is from -lean mixture -late ignition timing -bad valves or bad valve timing So fix them in the order of how easy they are and how likely they are The carb is by far the easiest and cheapest. Late ignition timing can be caused by a sheared or partly sheared flywheel key. about pneumovax 23 PNEUMOVAX 23 is a vaccine that is given as a shot. ATF is VERY high in detergents. This can result in some fuel being pumped through the engine and into the hot muffler, causing that fuel to ignite. Air screw is located on the carb away from the engine. RE: Atv is backfiring through carb. I would slow down a little and then when I slowly stepped on the gas it would pop loudly through the carb and then take off. You are probably right about the intake valve sticking but after googling "engine backfires through carb" you get a bit paranoid when you see people pulling out bent pushrods or having to replace head gaskets or worn camshafts. a lean mis-fire. ====carb issues. Here are some causes of that delayed detonation that may clear it up a bit more. I've messed with Oct 14, 2015 Backfiring from the exhaust when DECELERATING is caused by a lean pilot circuit and is actually called afterfire. it has a few pops then a backfire or 2 kind of loudly but no flames shoot SA750. Fixed the exact same issue Honda-Tech member’s dad once sold this ’79 Civic to give his family a Christmas. The guy who owned the 400EX took pretty good care of it, at least what I could see. Cars & Motorcycles. My Kawasaki Mower Engine Backfires When Starting. Backfires through the intake are generally related to problems with ignition timing, and backfires through the exhaust are usually related to fuel mixture problems. Backfires when starting. ====carb issues. If your gas valve tests good, or has now been repaired or replaced and tests good, we will move on to the carb float needle. I just had to adjust the squirter linkage, and it stopped Thunder Series AVS 650 CFM Off-Road Carb with Electric Choke, Satin Finish. , Why is the engine bogging under acceleration? A fuel problem would be constant as well as dirty carb, clogged hoses, leaking intake, so the problem is related to Finally got a carb kit and a FMF slip on. and tested for leaking float valve in carb and the All chapters in the Honda, Polaris, Yamaha, Can Am, Kawasaki, Arctic Cat, KTM and Suzuki service manuals apply to the whole vehicle and illustrates procedures for removal/installation of components that are in detailed step-by-step fashion. Kloque, Nov 16, 2011 #20. Afterfire occurs after the engine has been shut off. I cleaned the carb and adjusted the air/fuel screw to 1 3/4 turns out. Will start run for a few sec. And that final detonation at the end is actually fairly common Carburetor Troubleshooting Guide. ALL WARRANTIES ARE HANDLED DIRECTLY THROUGH REDLINE NOT Deceleration Popping explained high RPM with a carb that is open, flowing freely. The clutch is done. $445. I have a 07 400ex that just recently started backfiring through the carberator, it mainly does it when it starts cold at idle and only Atv is backfiring through carb. Offered as only slip 5 Jun 201314 Oct 2015Bought a 2000 400ex, all stock. After dealing with the lean carb backfiring and curing it a few months ago out of no where it has returned when the engine is cold. Manual is searchable and indexed. My problems is when I try to rev the engine it just dies. Discussion in '4 Stroke Bicycle Engines & Kits' started by Tsears0627, Sep 10, 2016. If thats the problem. Backfiring is …2011/05/07 · Honda TRX Forum > Honda TRX Tech Garage > Maintenance / Important Information > 400ex carb problem Reply. if it backfires on deceleration its lean if it pops on acceleration its running rich. When I start the machine there is gas spitting out of the carb. backfire through carb I was having backfiring up through the carb really bad last year and it ended up being either a couple bad (new) spark plugs or i put too much anti-seize on them and they were not grounding to the block. This is only a guide to be used to base your carb tuning off of. Check for air leaks, under carb, intake, fuel restriction. As far as the 2 May 2011 Hi, I have a 2002 400ex that I can't get to idle without bottoming out Been through the Carb numerous times with cleaner, fine wires and during deceleration (enrichening the mixture) to prevent backfiring in the exhaust. After you restart, turn the fuel back on. But now, it’s back in the family. See if you can find out if this plate was removed. 300ex carb 400ex carb rebuild kit 400ex carburetor 400ex plastic 400ex valves 450r carb biker patches buell kawasaki kyosho motorcycle monster energy motocross motorcycle motorcycle face mask motorcycle license plate motorcycle patches motorcycle plate the longshots victory motorcycle yamaha. Carburetor Carb Rebuild Kit Repair for Honda TRX400EX 400EX TRX 400 EX 1999-2004 Replacement Carb Rebuild Kit for 1999-2004 Honda TRX400EX FourTrax Each kit contains all necessary parts, such as jet needles, main and slow jets, float chamber gaskets, and float valves as picture shows . My only complaint was a small scratch in the muffler case, but the plastics cover it up so I can't even see it. The rebuild consisted of a new wiesco 400ex problem Daivd Ives. If you would like to get a quote on a new 2004 Yamaha Raptor 660R use our Build Your Own tool, or Compare this ATV to other Sport ATVs. I can see some black packing coming through the core. I somehow managed to drive it around the block and it especially wants to die/power surges once I get into 2nd. Honda’s hemispherical combustion chamber was inspired by our proven racing technology. Then when I tried to start it,it backfired through the intake. here is a list of all the things i have fixed. I'm no carb wizard, but all I did was run some Sea Foam through it and rode the crap out of the bike. 08 Kawasaki Teryx brute force 750 carb backfire posted by 400ex 450r carb INSTALL TUNE exhaust Backfire lean idle fix. When you have it choked it runs fine. What Are the Signs of a Bad Ignition Module? Symptoms of a bad ignition module are sudden engine stalling or power loss while the car is in motion, engine stuttering accompanied by a smell of gasoline and an inability to restart the engine following a stall. If it clears up then you could have a tad of rust on that valve stem. somehow the cable got twisted and wouldnt allow it to release fully Below is the information on the 2004 Yamaha Raptor 660R. Pull the carb bowls off. I also run a Hesitation Definition - An engine hesitation is an interruption of continuous power during acceleration. The jerky driving spells out that it’s out of tune. If the air cut valve holds vacuum, it is ok. What you are getting is after fire, usually caused by unburned fuel reaching a hot muffler. really sounds like its starving for fuel. The rebuild consisted of a new wiesco - - 400ex Backfiring, no clue. This is most often caused by an overly rich condition in the air-fuel mix (typically the idle circuit causing the typical crackling backfire on closed throttle, this often a byproduct when someone tunes their carb to eliminate a low-RPM stumble when the throttle is just opened). SOME popping But then, I've run a lot of seafoam through her since last winter - and that alone can really foul the plugs. I installed everything out it back together and it back fires through the carb at a fast idle but doesn't do it when the choke is on. 6) Caused by installer allowing engine to spit-back up through carb. There is no carb adjustment. This means that fuel is getting ignited before the cylinder. Although there are many problems that can cause the intake system to backfire, the overall effect is the same. - Popping or spitting through the carb occurs when the throttle is opened. - I have a 1999 grizzly 600. to prevent backfiring in the exhaust. backfiring through carb after a rebuild, wouldn't start no matter what I did, adjust valves, set timing, new distributor, wires plugs, new heads, rebuilt carb, no intake vacuum leaks, good compression, plenty of fuel, spark and great oil psi. The carb was rebuilt twice by them before I took the carb to a carby specialist. By. The float bowl on the carb will be full however and will contain enough fuel to run the engine at tickover for a minute or so. KFX 700 Carb Problem. Sputtering / Dirty Carburetor Fix - Easy Way - YouTube www. the problem is the bike sat for 12 weeks so i cleaned the carb so now it wont idle The 400EX is a great quad, no power monster, but a very fun quad to have. com/youtube?q=400ex+backfire+through+carb&v=VWQLS5WwYlw Mar 14, 2013 Sputtering / Dirty Carburetor Fix - Easy Way ATV Dirt Bike Quad I show you how to fix your sputtering carburetor by cleaning out the main jet. It is jetted like it said and the fuel mixture screw is 3 turns out like the instructions say. 82 thoughts on “My Engine Is Blowing Smoke! What Does It Mean?” WHEN I START THE TRUCK IT PRODUCES SMOKE AT THE BACK WHICH I CAN EASILY SEE THROUGH THE SIDE 400ex intake boot K&N air filter Stock carb Stock Head pipe Stock bottom end Stock chain and gearing. His exhaust The backfiring usually indicates a lean condition. Add to Cart. The intake is a performer with a Holley carb, I think it's a 4160, but I just can't seem to make it sit, the intake, on the engine, without sealing properly. Check the Intake Valve. However, Edelbrock tells me that all other settings being equal, (pipe, air filter etc. It surges high and low and backfires through the muffler, cold or hot. Hello everyone. Needless to say that fixed it, blew whatever was gunked in the carb out. any suggestions Backfiring through the intake is a completely different story; this happens when air-fuel mixture in the cylinder ignites prematurely, and will often be heard through the air filter/intake, due to the intake valves being open at the time of the backfire. Discussion in 'Chainsaw' started by NWTimber, Feb 22, 2013