400ex valve adjustment symptoms.

400ex valve adjustment symptoms com/ - Main Websitehttp://www. Apologies for the bad voiceover quality, This is my first one so im still learning it Oct 29, 2012 · Every carburetor know to man will have a way to adjust the air fuel ratio at idle. The first step is to determine if you have an AIR screw that meters air, or a FUEL screw that meters fuel. The engine may run rough, misfire, or fail to start. 04in . There are instructions on this site. A jammed decompressor will also cause a steady ticking sound when the engine is running. Guess all that's left to do is remove the decompressor pin and the decompressor clutch from the cam, try to fix the timing, and adjust the valves once again. 5:1 piston,stage 2#190 Webcam,open airbox, Twin Air,full FMF system,Pingel fuel valve,Ricor Racing rear shock, Ricor Racing fork Intiminators, Progressive springs, Sargeant seat,DRZ250 tailight,custom plate,LED's,GPS,sumo fender,PT bars,Cycra brushguards IMS lowered pegs, aluminum skid Apr 25, 2025 · JUMP TO TOPIC. The engine would make an intermittent knock/clank Jan 30, 2019 · throwback to the last time my quad ran HAHA. Definitely check/adjust your valves to spec. The most important one is the first one at 20 hours just after the engine is completely broken in. When valves need adjusted they make ticking noise. Another possible cause of a ticking noise in the engine of a Honda 400EX is that the piston rings are worn out. thehonda400ex. (-5c) Once we got it started when it was idling low as we're trying to get it warmed up. :ermm: :ermm: :ermm: :ermm: Mar 31, 2008 · Honda TRX 400EX & 400X ATV Info; Valve adjustment on new quad; If this is your first visit, be sure to check out the FAQ by clicking the link above. They work opposite of each other so it is important to know that before Apr 18, 2012 · 08 400ex valve adjust. you can test the wires that lead to it. That's what I think it could be and what other have said it could be. d. It's fairly easy to adjust the valves. 13mm on intake . or. More tuning needed to dial it in! A quick explanation of how the Honda auto decompression mechanism functions. ①. TRX400EX SportTrax 400EX offroad vehicle pdf manual download. 00 2nd place 165. The walkthrough covers intake valve clearance adjustment and exhaust valve adjustment. but not the c. hold down,alum. May 3, 2012 · 4) Improper valve adjustment. Which would have put there adjustment out off of tdc so it would be adjusted wrong. 10mm. We heat cycled the engine 3 times and the valves were a little noisy but not bad. so since the day I bought my 400ex, it has had a noisy valve tick due to the hotcam inside it. Always re-adjust the valves when doing a timing chain. Jul 9, 2002 · Ok, a friend of mine has a 99 model 400ex that probably has never had the valves adjusted. 3 participants last post by green_400ex May 9, 2011. bolt. They took the head off to do the work. mine wont ever start cold. 006- like Hotcams said to do. dont short cut steps your only gonna make a easy job harder. 1 compression) timing chain, and clutch. timing key,jet kit,HD timing chain, pro taper fat bars,fly adapters,acerbis hand guards,prm front bumper,prm rear skid,alba steering stablizer,E-brake delete,custom seat cover,custom graphics, ac nerf bars,450r front shocks, 450r foot pegs,no toil air filter,SS batt. you cannot test the c. Cam sprocket and T mark on the flywheel. Remove the spark plug and both allen caps on left side of case. 5 Clicking Noise or Loud Tapping; 1. It could be your carb is out of tune. good luck. i did it and the valves still tick so i did it again and the valves still tick i know i had to find TDC compression stroke by only turning the motor counter clockwise and the T mark isnt going to be aligned perfectly because of my sparks key so i put a screwdriver in the Feb 22, 2019 · Is the carb that beat up that it’s byond repair? A valve adjustment would prob help for other reasons but not this problem. Aug 8, 2007 · I have a quick question. 5. Q9powerSportsUSA. This adjustment will trim the mixture so that you can have a smooth running engine. 000rpm i really wonder. We set the valve clearances to Honda factory specs- intake at . It has a stage one hot cam in it. 004in is the same as 0. Dec 12, 2013 · What is the Valve Settings for a 2007 400ex stock motor. I'd start with checking the came chain/tensioner, and then the valve adjustment if it's still ticking. Honda 400EX 07skidoo GSX 800 03Skidoo Mar 11, 2013 · It will tick if your valve clearances are too big. 004 inches of clearance. etc i bought last fall, it had a tick. 2. Probally the timing chain but possibly the valves as well. Aug 18, 2011 · 1999 honda 400ex bored 0. I don't know how the Magnas are set up, so it might be different and probably is. When he starts it , it makes a terrible rattling noise and I'm guessing that it's the valves but I'm not sure since I really wouldn't know what to listen for. My poor little iPhone couldn’t handle the volume lol. The timing is pretty straight forward as your 300 is. green_400ex Discussion starter 6 posts Dec 29, 2014 · 2006 Green Honda Foreman 500 - Viper Elite Winch 2004 Yellow Honda 250ex - Grandson's Bike 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 Jul 26, 2013 · I have a 2003 400ex and I have rebuilt the top end. Aug 11, 2020 · I have seen a few times on the XR250's, XR400, 400EX's where the Valve Rockers wear out. When i had to Oct 2, 2011 · Hotcams and most other aftermarket cams dont use the decompression mechanism. 3 High Fuel Usage; 1. Ktm springs can go around 10. Honda 400EX Valve Adjustment Instructions Time to adjust the valves on your 400EX? Interested in doing it yourself? You have come to the right place! Adjusting your own valves is within the capabilities of anyone with basic mechanical knowledge. When you go to port the head on it and you find it has bad intake valves (which most will) it would benefit you to go to a big valve port and flow for an extra $100 or so (plus valves which you have to buy anyway) from a reputable engine builder. I have tried everything to eliminate this tick I went back to stock (. And also check for good spark and a fresh plug. And like stated the exhaust valves are set to 0. #Honda, #400ex, #Fix Nov 24, 2018 · Hey guys; I recently picked up a 2008 400ex which appears to be in good condition. The most common symptom of bad valve adjustment is poor engine performance. valve job 450r carb open airbox wk&n nerf bars, big gun full system pipe itp wheels, Feb 23, 2010 · . After firing it up for the first time it sounded like a ball pein hammer was hitting the top of the valve cover. Remove the cylinder head cover and recoil starter. 005. i is good, your valves might be out of time. Jul 16, 2023 · 4. Note the excerpt in the service manual - "NOTE: If all the valves are closed except the RH exhaust valve, this may indicate a jammed decompressor unit. Jan 20, 2006 · 400ex Valve Adjustment If this is your first visit, be sure to check out the FAQ by clicking the link above. any help would be appreciated. your piston rings maybe worn. 008. My short run it seemed Nov 21, 2023 · 400ex valve adjustment Jump to Latest 1. With all 4 valves adjusted, replace the valve and timing covers, making sure that the o-rings are not torn. after finding top dead centerset intake valve lash to . Reserve Fuel. Would valve adjustment solve this problem? Jan 4, 2010 · i bought a blown up 400ex for 350 bucks. Observe the pressure gauge: The pressure gauge should show a steady increase in pressure as you press the brake pedal May 30, 2011 · Honda TRX 400EX & 400X ATV Info; fast valve adjustment question; If this is your first visit, be sure to check out the FAQ by clicking the link above. Took a rocker assembly from a running motor (no ticking) and put on adjusted valves with cam lobes down (can see 3 lines on cam gear 3,9 and 12 o'clock). Throttle Inspection. 005 EX. YOu did install the cam lobes down correct??what I normally do it set the dash mark closest to the timing tensioner or back of the engine a little higher than the head surface maybe 1/16-1/8th so when you snap the tensioner back to it's working position it will pull the chain tight and the cam right where it needs to be. 5:1, ported, 43mm carb, web cam, dasa, buncha other goodies -2005 400EX 04/05 450R carb, stage 2 hotcam, HMF Dec 4, 2010 · 2002 400EX ticking noise. Jun 25, 2011 · Every freaking 4-stroke needs valve adjustments! If you can't afford an hour of labor at the dealer or don't want to learn to do it yourselfgive up and quit riding right now. you could have a bad valve ?. Aug 17, 2020 · I have a 2012 Honda TRX400X and I am thinking of installing a stage two hot cam with a stock bore 11:1. Most users are using 650cc and 650cc can turn 8000rpm but 450cc 11. 2005 Honda Trx400ex Oem Motorcycle Parts Motosport. When the engine runs smooth with the adjustment screw about one and a half turns out from the seat you have it! Final Thought Jan 16, 2013 · Welcome to the forums. I put back on top (T) and rotated 360 and had to back off the adjustment screws a lot. If this is the case, the best solution is to take the ATV to a qualified mechanic who can clean or replace the valves as necessary. Apr 4, 2016 · bad cylinder to piston clearance and/or egg shaped cylinder (cylinder boring and oversize piston required to correct), cracked/out of spec valve guide or torn valve seal, or something as simple as the piston ring openings all lined up. Jan 26, 2013 · Dark Mode; Light Mode; Menu Log in Sep 7, 2009 · My dad is in Arizona trying to adjust the valves on his 1995 honda 300 TRX Fourtrax. 6. Is his adjustment similar to the one mentioned above or can anyone walk me through it like the previous answer, which was by the way awesome. I have a picture with the head cover off and I couldn’t really see it too well but I don’t think I see the decompression pin. 78 FREE delivery Tue, Mar 4 on $35 of items shipped by Amazon Jun 13, 2010 · My bike is a 07 and i bought it used in 08. Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!! You only need two tools in life -- WD-40 and duct tape. 004 and exhaust . Jun 20, 2013 · Initially I thought it was the valves, adjusted the valves and the tick remained. It may also consume too much oil or produce excessive exhaust smoke. This 400ex problem was a mystery but I finally figured out what it was. If you are above 3000ft. Just get a feeler gauge from an auto parts store, figure out what the valve clearance is and adjust them to spec. I swapped out the battery with known good battery. 004 feeler gauge in both sides so I adjusted both to where the feeler gauge had a little pull. 05in . The "maintenance" section of the service manual will show you how. New Piston New timing Chain New Timing chain tensioner guides New valves New valve guides After I have done all of this I get a nice tick noise. 4 Low Power; 1. 490 12. 005 in. 02mm. 78 $ 32 . Go one size smaller and try the adjustment again. I would check it just to be sure. The tensioner is spring loaded and automatically adjusts the timing chain as it wears. Then it will act like it has a Should I use stock valve clearence on a 03 400ex w/ hotcams?? May 26, 2008 · I few weeks ago I had to take my '08 400EX to the dealership for a broken spark plug that they installed wrong. The short version is: 1) Set piston at TDC on the compression stroke . Jan 5, 2017 · Update! Pulling the last of my hair out! Acquired a 06 parts bike. What will happen is the Contact Point where the Cam and the Rockers meet the the Rockers will eventually become "Cupped" and no matter where you set the valve lash the tick is insanely loud. May 29, 2021 · valve adjustment and walkaround of a 2006 honda 400 ex for a friends quad. And valve adjustment has absolutely zero to do with smoke. . . If it is stock and you want to run it without that in there, you have to take the cam and press off the decompression mechanism off the cam itself and then weld shut the oil holes. When turning the thing counter-clockwise i couldnt tell if the valves where closed or not when it was TDC (indicated by the T). or your timming maybe out. My "local mechanic" screwed up my little bros 300 and now it ticks louder than the exaust. Jun 4, 2003 · i have a 400ex and i will be adjusting the valves again. Port and flow work on this machine, even with stock size valves, will benefit greatly. Not sure how this could be the case or why it would cause the engine to burn oil this bad, but in the reading/research I've done some people have mentioned that this could be the case. Sep 25, 2021 · Valve stuck in a guide, cam jumped time, valve float (happens at extreme high RPM), improper valve assembly, broken valve spring, rocker arm binding or seized on shaft, improper assembly of the rocker arm assemblies, engine overheating (caused by extended idling or low speed operation, grade of fuel, lugging the engine or lack of lubrication Feb 26, 2012 · hmf slip on,stage 3 hot cam,procom rev box,curtis sparks 6 deg. so i did the adjustment and it sounded great, but the tapping is already back within 3-4 hrs of riding time. Step-by-step walkthrough with video on how to adjust the valve clearance on a Honda TRX400EX. Aug 30, 2005 · I am gonna tear apart a friends 400EX and put a piston and rings in it and was wondering if anyone could give me the factory specs on valve adjustment for it. I could not stick the . Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!! What do you thing about valve floating? I read many thread at husaberg forum about valve springs. I used . Sep 2, 2009 · i am gunna get my valves done soon and i wanna know how much i should have too pay the shop,i called a few places 1st place 180. You may have to register before you can post: click the register link above to proceed. If they are to tight it will be a bear to start if it starts at all. I don't know what the break in adjustment recommendation is, but if it were me, I'd check it. Now, with the valve adjustment, when I got the flywheel "T" mark lined up, there was no play in the rocker arms, I just assumed maybe the valve seats had worn down that much and the valve sprigs were all the way up to the rocker Mar 29, 2014 · Check the valve clearance. do you have to do it on the 250EX also? If so, can anyone email me or tell me exactly how it is done? I dont want to fork over the hefty amount of money it would cost the dealer to do it. check your cam sheet for the valve lash specs The guy i bought bike from said he had his uncle, "Bike shop employed bike mechanic," perform a valve clearance adjustment just a short time ago, and he said the bike has clattered badly since. I suspect your valves are super tight holding a vakve open. Mar 15, 2011 · You should always follow the maintenance guidelines. Feb 22, 2011 · 2006 400ex. Where once i got it in there i could slide it back and forth. the sheet says . Double check that the choke is not stuck. rebuilt it new frame 450r stock shocks 11:1 piston, new clutch, it has stock exhuast now though and cam. to/3HLRWMJCanadian Link https://amzn. i. I have about 50 hours on it and have done it once after about 30 hrs. I had the bike for about 6 months and had to adjust the valves. Valve adjustment on a 400ex. If they're too tight, the valves could be open slightly letting the compression escape. The indicators of valve issues include noise (ticking), loss of power, any ignition difficulties, high fuel consumption, and excessive smoke from the exhaust. then your c. taotaopartsdirect. How to adjust honda atv valves Honda ATV 400EX Valve Adjustment Instructions. By turning the adjustment screw to the left it will allow more fuel to be returned back to the float bowl resulting in less fuel being sent to the pump squirter to feed the motor. 3K views 3 replies 4 participants last post by Quickster2 Dec 24, 2023 Learn how to adjust the valves on a Honda TRX 400EX ATV using a feeler gauge. This is rough tutorial on how to adjust the valves on your honda 400ex. puede ir a 0,001 cada una si es necesario según las instrucciones de Hotcam que recuerdo. is this a sign of wear on anything particular? or do i just need to do it again till it holds. I figured it was normal, that the different cam would wear the valves Jun 13, 2022 · Dont use the cheap $120 ebay top end kit and REPLACE THE TIMING CHAIN! These are the things that kill these machines. This past week however when trying to start and run it in cold weather. And they seemed to have a lot of slack in them when I did it then. com/ - Parts WebsiteQ9 PowerSports USA is America’s most affordable Powersports D Dec 30, 2009 · Okay I just finshed my first valve adjustment on my bike. Dec 14, 2008 · My question is, are there any symptoms of a needed valve adjustment? Smoke when starting? Honda TRX 400EX & 400X ATV Info; When to adjust valves? What is the valve lash on a 400EX? 0. It was kinda awkward. You can't adjust the tensioner. Any help would be great. Nov 28, 2005 · is a valve adjusting a hard maintance thing or would it be better to take to like a local shop and have it done?? is it expensive?? and also how do u know if a 400ex needs it?? mine is ticking very loudly Feb 19, 2008 · Last november a friend helped (hugely) me install a Stage 2 Hotcam in my 400ex. 004 and on the exhaust is . Sep 6, 2022 · This can be due to a variety of things, such as a dirty valve, debris in the valve train, or a bent valve. The next step is to remove the head cover and recheck the leak down. 000rpm 🙂 it can be float at 11. I also wrote a post about adjusting the valves, which you may find useful – ATV valve adjusting in 6 steps. 2 Pre-ignition Problems; 1. Feb 17, 2017 · Anytime you pull the valve cover off you 100% need to adjust the valves. 005 inches of clearance, and the intake valves should have . You are probably wondering, "what tools do I need?". Swapped out CDI, Coil, CPS, Stator, Magneto, Voltage Regulator, Control Switch and Speedo Gauge all to no avail. I also cleaned the carb and changed the spark plug. I am putting my quad back together after doing a piston and cam. 05ex), i went to what was recommended by a few on various forums (. No change. Jun 16, 2015 · Alright. I tore my quad down today to adjust the valves. Dec 11, 2017 · After completely rebuilding the top end (wiseco 416 with 10. Throttle Freeplay Inspection/Adjustment. Apr 10, 2009 · Honda TRX 400EX & 400X ATV Info; 400ex valve adjustment; If this is your first visit, be sure to check out the FAQ by clicking the link above. 1 What Are the Valve Adjustment Symptoms?. If you think any other specs are important in this job please feel free to add them. I am trying to relay how to adjust his valves to him. Ive never heard a 400ex to compare to. Jul 25, 2014 · 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 does it like 2 or 3 times then stops. 15mm on exhaust. Mar 11, 2012 · Best way to do it so you dont mess up timing is to zip tie the gear to the chain and remove the gear from the cam. 004 Is what the 250X are and the 300EX is basically the same, pull the timing plug out rais and support the rearend I usually put mine in 3rd or 4th so I can bump the wheels around by grabbing one and turning it line up the line above the "T" and start adjusting. Aug 28, 2002 · Can anyone tell me the correct way to adjust the valves on a 2000 400EX? And the specs? Thanks Guys. Wiring Harness For Honda Trx400ex 400ex 12022 2004 Assy 32100 Hn1 000 Ucar. Apr 9, 2025 · Honda ATV 400EX Valve Adjustment Instructions instrucciones paso a paso pero en resumen, las válvulas de escape deben tener 0,005 pulgadas de holgura, y las válvulas de admisión deben tener 0,004 pulgadas de holgura. Mar 12, 2019 · FYI, when I have done the valve adjustment on the can am ATV, and this UTVthe valves have been too tight if anything. Mar 1, 2018 · Honda ATV 400EX Valve Adjustment Instructions -2006 450R. And where can I get a free Service Manual? Thanks 07 400 EX Service Manual and Valve Adjustment Question. 5:1, ported, 43mm carb, web cam, dasa, buncha other goodies -2005 400EX 04/05 450R carb, stage 2 hotcam, HMF #outdoorkicks #trx400ex #trx #valvesetthe motor has to be in top dead-senter to adjust the valves (forgot to mention that)#400ex #mechanics #valveadjustment This video will show the viewer how to properly adjust the valves on a Honda Trx 400 Ex. Nov 13, 2011 · PRI stands for prime, which in turn means your currently needing a richer fuel mixture to stay running. Mar 1, 2011 · You cannot adjust a performance cam to factory specs you will have to follow the cam manufacturer's valve lash instructions. Took it to the shop and it need all new valves. Intake . I read the tech article on how to do an adjustment on a 400 and it don't seem that difficult. May 17, 2014 · 400ex valve cover question Jump to Latest 2K views 6 replies 5 participants last post by scott. Dec 19, 2021 · 1 Pcs M36 valve tappet adjust hole cover, CNC merchaniced aluminum cover with o-ring (Aftermarket) Made of aluminum rather than steel, Lighter weight and wouldn't hurt the threads of your UTV/ATV/Motorcycle ; Fits valve tappet adj cover cap for 1999-2008 Trx400ex, 2009-2014 Trx400x, 1984-2004 XR250R, 1996-2004 XR400R May 6, 2011 · 03 400ex valves adjustment. Jun 25, 2010 · Always adjust the valve clearance with the engine cold. He is not computer savy but is good at working on machines. It's an easy fix. Shut it off Oct 22, 2020 · In todays episode we work on the Honda TRX 400EX Quad. 005" clearance, approximately 3/8" to 7/16 Sep 12, 2004 · hey guys I need to know if the valve adjustment is the same on a 300 as it is on a 400. Actually, I rotated the flywheel around many times, It's extremely difficult to watch the valves opening and closing, and look onto the timing hole too. Jan 1, 2019 · Honda Atv 400ex Valve Adjustment Instructions. Apr 9, 2025 · Honda ATV 400EX Valve Adjustment Instructions Schritt für Schritt Anweisungen aber kurz gesagt, die Auslassventile sollten 0,005 Zoll Spiel haben, und die Einlassventile sollten 0,004 Zoll Spiel haben. which is fine. 000rpm. The exhaust valves should have . Now I am down to two possible causes, slack in the timing chain or a piston tick could anybody listen to the noise and possibly help me out? 400EX engine tick - YouTube Feb 19, 2010 · okay so long story short my bike has the 6 degree timing advance from sparks racing im trying to do a valve adjustment. pero siempre configuro las mías de Valve Seal Spring & Complete gasket Kit Compatible with HONDA TRX400EX TRX400X 400EX 400X 2x4 1999-2014 XR400R 1996-2004 OEM 14711-KCY-670 14721-KCY-670 Price, product page $32. 1 stop any bolt from falling down there ( which makes for a bad day) and 2 it keeps the chain from falling off the crank bye keeping some tension down there. Trx400ex Sportrax Honda Online Atv Service Manual Cyclepedia May 1, 2010 · no. Then I checked the timing chain tensioner, which was fine as well. An how long would it take to adjust them? Honda TRX 400EX & 400X ATV Info; Valve adjustment; Aug 31, 2005 · In the tech article on adjusting the valves on this site for a 400ex it says the gap on intake is . Anyway, they admitted fault, took care of the problem, drilled the old one out, tapped the threads and everything is good now. Jul 5, 2012 · If it was way stretched then someone could have adjusted the valves for the stretched chain. Nov 10, 2015 · I'm going to tackle the valve adjustment and replace the cam chain tensioner myself but I can't find too much information on a step-by-step on how to replace the tensioner. com Deidra’s first boosted launch! Only ran a 12. We pulled it apart, reset the valves and it was quiet again. 004 IN/. To set the valve clearance, you need to have the piston on TDC on the compression stroke. The valves are a little noisy. i was wondering what effect the temperature and altitude have on the adjustments that need to be made? also, i could not remember if a little loose on the valves gave a little more lowend or topend and if a little tight gave a little more lowend or topend. when i bought this bike a few weeks ago it was in bad need of a valve adjustment. 1. Long story, summed up, they put the wrong plug in. Issues with intake valves can lead to poor combustion, compromising the proper operation of the vehicle over time and reducing its performance. What you need now is a new pilot jet. something is making either the piston pump oil out of the bottom end out the exhaust or its dripping through Mar 12, 2011 · I have a Stage 1 and was wondering the same thing. your main would be like 122 slow will be the same and 2 1/2 turns. Fuel Valve/Left Side. Oem springs can break at 200 hours and everyone offers dual valve springs from ktm. If you replaced rocker arms and don't know what valve lash is then this is certainly your problem. Jul 17, 2011 · '05 KFX 400-FCR 39mm TORS/TPS Removed-400ex Intake Tube-Uni 6" Clamp on Filter-HMF Competition Full Exhaust-Alba Pro Elite Black Nerf Bars-13t JT Front Sprocket Mar 23, 2012 · Please let me know. The 400ex is a piece of cake to do. and also the battery wont charge while ridding dont know if its a bad battery or what Oct 23, 2017 · Welcome! It can be worn rocker arms, worn timing chain guides, stretched cam chain, tensioner, or the valves are just adjusted wrong. So I guess Im going to give it a try. but you will have to set the lash at the lowest point of the lobe, you will have to rock the engine back and forth shine a light into the tappet caove opening and watch the cam once you fine the lowest point make your adjustments there and do the same for each rocker How to Adjust Honda TRX400EX Valve Clearance . Got it back rode it probable 5 times and it started not to start. Another thing to check for. oh and when you get it to the "T" you may have to hold the tire in place you can try to get it to neutral without it Oct 7, 2018 · So I recently adjusted the valves on my 2008 400ex because I started to hear a tick and it got louder and louder, (wasn't horrible but I could tell it was getting slowly louder) so I decided to do a valve adjustment, I know I did it correctly as one of my friends and I have done this many times before on quads, but this was a weird case, after we adjusted them to stock specs, we put on the Jan 12, 2012 · 2006 TRX400ex AC Nerfs - Swingarm Skid + Honda Racing Skid - Protaper Contour Bars - Rox 2" Riser - CBR Clutch Perch - Oury Grips - HT Moto Seat Cover - Custom Poly Case Saver - TRX450R Front Shocks - XR250R CDI - YFZ 450 Dual Piston Front Calipers - ITP T9 Baja Rear + GBC X-Rex - CanAm DS450 Front Rims +Holeshot SR Front - Dominator Bumper - UNI Filter - 13/39 Gearing - DID x-ring Chain Feb 3, 2020 · A cold engine cylinder leak down will expose a bent valve. The valves spec was ok but i did put two new exhaust valves in it because the auto decompression tap was broke off. The further in the adjustment the less fuel is sent to the float bowl. May 4, 2011 · Original HOW TO: located here: HotCams Stage 1 Install by Little Sahara Power Sports, LLC Hot Cams Stage 1 Install in a Honda 400EX The following is a general list of the steps taken to install a Hot Cams stage one cam in a Honda 400ex, most of the instructions are May 17, 2020 · Check out symptoms of poor valve adjustment – Valve adjustment symptoms I wrote a post about checking and adjusting valves which you may find helpful – ATV valve adjustment in 6 steps Head-gasket – Damaged gasket will allow air into the cylinder un-metered. to/3tbMhLJ Todays video is a easy the last step on the rebuilt 650h Apr 8, 2014 · The pump adjustment screw is set to 2 ¼ turns out. Be sure the engine is on TDC of the compression stroke. I thought that I had the right shim in one of the valves but it seemed so damn tight getting the right feeler gauge under it but when I dropped the shim down one size is seemed a little to lose? is it better to have them really tight then kinda lose Dec 12, 2011 · If so, I would check the valve clearance and make sure the valves are not too tight. Oct 20, 2016 · I had a 2006 honda trx 400ex that had 115 psi compression before I went to adjust the valves. Tutorial covers intake valve clearance adjustment and exhaust valve adjustment. Put everything back and was worse than before. d . As for your petcock not flowing when on reserve, it cant really answer it, i know that suzuki petcocks are supposed to have a separate line running to it from the carb into on the other side petcock, that causes the fuel to flow through the gas line. Apply pressure to the brake pedal: Press the brake pedal multiple times to build up pressure in the brake system. Mar 5, 2010 · If you adjust the valves to tight (to little clearance) then it is possible to burn a valve, damaging the valve, and possibly the cylinder head. 00 3rd place 65. Feb 5, 2006 · i recently bought a used 2001 400ex totally stock in really nice shape, i keep reading on the site about valve adjustments, how do i know if this needs to be done, how will this help, and is it hard to do?? Dec 19, 2021 · 1 pair M36 valve tappet adjust hole cover, CNC merchaniced aluminum cover with o-ring (Aftermarket) Made of aluminum rather than steel, Lighter weight and wouldn't hurt the threads of your UTV/ATV/Motorcycle ; Fits valve tappet adj cover cap for 1999-2008 Trx400ex, 2009-2014 Trx400x, 1984-2004 XR250R, 1996-2004 XR400R Jan 1, 2007 · iv had my 05 for about 2 years now and havent adjusted the valves, Honda TRX 400EX & 400X ATV Info; valve adjustment; If this is your first visit, Apr 8, 2025 · Honda ATV 400EX Valve Adjustment Instructions -2005 400EX 04/05 450R carb, stage 2 hotcam, HMF-Do it right the first time, and you wont have a problem later http://www. So, you need to align the "T" mark on the flywheel and this will put the piston at TDC. May 29, 2017 · Valve adjustment Im not sur,,,the guy I got it from said it has a big bore kit on it he said a 4 wheeler shop did it but never said anything about stock or not cams,,,,,hell to be honest I'm a rookie and new about all this,,,I'm not even sure if it really has a big boar kit,,when I was looking everything up I seen were you should have a bigger cam if you have a 440 kit,like I said I didn't Mar 15, 2016 · How many hours do you have to go before have to have the valves adjusted I think my only has 60 hours are her? Help please Sep 30, 2013 · My son and I just rebuilt the top end on his 400ex, set the valves, . All ehaust pipes are bolted tight. Does anybody know if this is the cold gap or the hot gap. He rode it gently to get the rings to seat for about half tank and the valves got really loud. Sep 13, 2005 · How do you know when you have to adjust your valves on a 400ex. The needle clip setting is supposed to be on the 3rd setting or middle as some may say. With that said, some guys perform it on time, some wait 30, 40 or 100 hours. All new valves, springs. Turn the motor counter-clockwise with a 17mm socket until the motor is at top dead center on the combustion stroke. The intake seemed a bit tight and the exhaust was i think atleast . Also what the tolerances are. It is loud at low RPM's but when you rev it up it quits ticking. if your getting fire at the spark plug. 2. New parts a few ups and downs we Jan 21, 2012 · Well i adjusted my valves tonight on my new recon for the first time. this is how it is positioned on the outside of the motor on the 400ex: my question is, can you simply unbolt it from the motor and pop the new one in? Get a set of Offset feeler gauges here https://amzn. 40over new timing chain. Easier cold starts, better fuel economy and improved engine performance are benefits of correctly adjusting the valve clearance on a Honda ATV. I pulled her all apart and found that the right side exhaust valve had, instead of factory recommended 0. Dec 23, 2016 · THE CORRECT PROCEDURE TO ADJUST THE VALVES: 1. alot comes into play May 27, 2020 · The symptoms of maladjusted valves vary; I wrote a post about it which you may find helpful – ATV valve adjustment symptoms. Thanks guys. Tearing her down to figure out what I thought was a carburator issue. 005 and tried to get slight drag. This was the first time I had ever attempted to adjust valves. 005in or 0. I'm asking this because if I set the gap cold it will be different when the motor is warm. Aug 21, 2017 · the 450 doesnt have valve adjustment caps, you talking about a 400ex? -2006 450R. 1mm or . 99' 400ex, and the valves were tapping from the getgo. I adjusted it out and checked the right exhaust valve. I have full Big Gun exhaust, stage two jet kit, UNI stage two air filter and Dynatek CDI box. It seemed to be alright in my opinion. At the same time, it can expose a stuck decomp - if air pressure is leaking past the RH exhaust valve it may be a stuck decomp - if air leaks past an intake valve, it is probably a bent valve. t May 20, 2014 Jun 10, 2002 · I know on the 400EX you have to adjust the valves. help? asap Jump to Latest 6K views 6 replies 4 participants last post by xistreets5953ix Apr 20, 2012 Sep 8, 2013 · I took cam out and adjusted valves at T and it was knocking. Open the bleeder valve: Open the bleeder valve to allow the brake fluid to flow into the pressure gauge. The more usual causes of jumped timing include: Nov 24, 2003 · Just coirous if we are suposed to adjust the valves hot or cold?,I have'nt been able to find any thing saying one way or the other,and have always done my cars valves hot, Thanks Joe 11-24-2003, 06:45 PM #2 I need some help. I Have seen it a million times. new pistion and rings. Also make sure you stuff rags in the hole this will do 2 things. ②. The reason you have to do this is because the rocker arms are in the valve cover and anytime its removed chances are you dont get it in the exact same spot. This camshaft is from an XR650L and this is a clip from my main XR650L tapping n Dec 3, 2010 · Yeah, it could be valves, bad timing chain tensioner, or stretched timing chain. and exhaust at . You may also want to do a valve adjustment. Jul 4, 2019 · Anytime you change the valve cover gasket you have to re-adjust the valve tappets. Mar 20, 2002 · I have a 2001 400ex and was just wondering how often everyone usually adjusts their valves. Mar 3, 2012 · What's your elevation you should be running a 128 main and 38 slow and 2 1/4 turns out from lightly seated on the fuel screw. It hung up the feeler gauge. always have to push it i dont even try anymore. Feb 2, 2011 · Alright i bought this quad a week ago. i itself. 00 i cant understand why the 3rd place is a 100 bux cheaper. Strange noises coming from a Honda ATV's engine can often be attributed to the need for a valve clearance adjustment. The top seven symptoms of poor Mar 16, 2011 · On the 400EX, put the feeler gauge between the top of the valve stem and the rocker arm to check valve clearance. Mar 5, 2012 · 05 Suzuki DR650, Mikuni TM40 flatslide pumper carb,JE 10. Feb 24, 2013 · Kibblewhite black diamond valves Kibblewhite valve springs Ported and polished head FCR 39 carb Curtis Sparks x6 big core full system Lonestar +1 swing arm Lonestar DC-4 long travel A-arms Axcalibar Racing Axle Feb 11, 2012 · This video series was intended to be helpful. 1) metric socket's and various ratchets/extensions (I prefer 6 point sockets) Sep 16, 2007 · Pretty sure there's a how-to around here somewhere with pictures and text describing how to adjust the valves. The first time it costed me 160 to get them adjusted. Trying to figurew out the issue here. could probably really use a exhuast though but anyways. 06ex) and I went to what someone adjust the engine speed by turning the 5 x 25 mm torx. when adjusting the valves I was a little confused. 6 Rough Idling Aug 31, 2022 · What Are Bad Valve Adjustment Symptoms? If the valves are not adjusted properly, it can cause a variety of problems with the engine. Maximum speed: 3,300 ± 150 min-1 (rpm) GOVERNOR GXV340・GXV390 Engine Adjustment Information VALVE CLEARANCE Valve clearance inspection and adjustment must be performed with the engine cold. 1 Faulty Valves; 1. From what im told cammed 400s are supposed to tap? Went for a little rip yesterday and all of a sudden they started tapping LOUD and the exhaust seemed to be louder. After the first day of riding, i could hear the valves clicking a little. 004set exhaust val Nov 28, 2023 · Motor Valve Failure: Symptoms and What to Do . and not getting enough compression. Jul 16, 2010 · Adjusting the low speed mixture screw helps a little but doesn't cure the problem completely. From what i seen online and read in the manual it stated to check the rocker arms for loosness with your fingers. At TDC, I started rotating the flywheel again, the intake valves opened, I came back around to TDC, and adjusted the valves. In the video below, John shows you how to adjust the valves on a Honda TRX 400EX ATV using a feeler gauge. air scoops,6 ply HD holeshots, 2'' wheel spacers Jul 7, 2021 · I end up fixing a 2001 Honda 400ex that was having major issues. pnexok jviiug jjcgw vpyzap nluf tqbdh myc qgmtf dwzbou rpgyd