How to Set the Cam Timing on a Honda TRX 400EX ATV | Partzilla.com

[@rowdy1835]

Thanks for the great videos I'm jumping it to my 1st 400ex top end rebuild and your info helped a ton, so again thanks a million..

[@paulbogdanski9753]

You videos are great.....I am in the process of taking my 2000 400 apart....

[@roryreyes34]

Thanks for the videos very well explained also I got my 400ex back up and running.

[@PartzillaParts]

+Rory Reyes: Awesome, Rory! Thanks for the thanks and glad you got your machine back up and running!

[@stonedfaceballer69]

, thank you you ended up answering my question I had on your engine rebuild video I had a few questions about some stuff and you answered them in this video

[@Ohioxc]

Hi John, thanks for the videos the have helped a lot. I am having an issue after the rebuild and was hoping you could help. I have set the timing four times at this point and still have a no start and recently had two backfires that knocked the carburetor off the intake manifold. My issue is every time I align the lines on the cam to the block I have a good amount of play in the cam (like an eight of a turn) it was the same on the old cam and new cam. The reason I did the rebuild was to get rid of the cam chain noise with a Part # 14401-MEB-671 cam chain for a CRF 450r. I read in multiple posts that it was the best cam chain to use. Could this be the issue? I set the valve lash and replaced the coil and cdi. The fuel might be degraded but I tried staring it with staring fluid and it didn’t start. Any advice would be appreciated, thanks.

[@dorianjames9798]

Would this work on a 1986 Honda fourtrax 350 as well? I have a new jug and piston, head, and gasket set for it. Just doing some research before I put her back together

[@benharrison7916]

I rebuilt a 2000 400 ex today and did not lap the valves in you think that will keep it from firing up now?

[@swamprott8591]

In here in 2022, great video series

[@adamsmith6542]

I have an 09 400x. I have a whine coming from the motor. Research says it could be cam bearings or oil pump. How hard is it to change the cam bearings or do I need a whole new cam?

[@joshorange3087]

Buen video. Estoy reparando mi Honda Falcon 400cc y es el mismo motor. Yo tenia la duda hacia donde debia de estar el arbol de leva orientado. Ahora se que el arbol de leva en punto T debe de ir hacia abajo y las marcas en el sprocket deben de estar niveladas respecto a la cabeza de valvulas. Buen trabajo !

[@PartzillaParts]

Gracias por mirar, me alegro de que haya ayudado!

[@joshorange3087]

-greetings from mexico !

[@eltorreja86]

@@PartzillaParts a también hablas español

[@JuniorK9188]

Your the honda man that's for sure.

[@jimdaniels443]

My timing chain broke, yamaha Timberwolf 250. I aligned crank marks but when aligning the cam marks rotating clockwise there is movement between the lobes. Should I rotate cam CCW to align the cam marks? Thanks for your help

[@joepalazzolo9315]

Got a questionI have my timing chain and cam unhooked on the 2002 Honda TRX 400 when I line up the timing mark on the fly wheel the piston is all the way down no matter what stroke I’m on whenever I get the piston TDC I am no longer on the fly wheel timing mark?

[@MrJamiesawicki]

This is a great video! I'm having a tough time replacing the timing chain and tensioner. Could you post a video of that on a trx400. Really want to learn how to replace! Thanks!!

[@PartzillaParts]

We've gotten a couple requests for this, Jamie. We'll see what we can do about getting it on the recording schedule. Thanks for watching!

[@sammysandlin906]

I have a 2016 honda 500 rubicon, that will not crank. It does nothing but click. I have purchased a new battery, starter, solenoid, key switch, and bank angle sensor ( that's the code given). Nothing has worked, what do I do now? Also checked the fuses, they test good. I'm lost now.

[@kevincollins3161]

How do I get my starter off of my 2007 Honda trx 450er all it does is just spin don’t catch the timing Chan is in the way can you do a video ?

[@leslieringstaff3922]

And I have another question after I put my head gasket and all that stuff it ran just fine but it was leaking out of the head I put everything back in a new hair gaskets and everything and I want to put it back in time as pretty much like you were showing me and when I put it all together I'm getting spark and everything but it will not hit I cannot get it to start

[@steverives3060]

Are you setting the cam sprocket timing marks with the chain tensioned or not tensioned

[@leslieringstaff3922]

I have a question I have a 400 EX and I changed the headgasket on it and that's all I did I followed the video I can get the T and get the tea come up when I set the The Cam the marks like you're saying and I could see the tea but my tea is a little away from the groove in the eyesight the eyesight and up I can't get the Cam to completely play on mark's on the head just right without being awful being off a little bit I was wondering does the end of the piece on the Cam does it come off

[@mikecal516]

I have a 99 400ex and my 400 ticks pretty good. I checked the valve adjustment and it still ticks pretty good. You think it can be it’s not timed right? Or

[@PartzillaParts]

It's common to have a little tic in these motors. You can readjust until you quiet it down a bit.

[@mobster1210]

hey there! I got a question, I own a 350cc Yamaha warrior y really would like to know how check or possibly set the timing by my self in case of out of T timing marks, can you help me please?

[@luise187]

My 400 had a bad head gasket so I replaced it , use to run fine , now it won’t stay running wants to turn in but won’t , keeps shooting load noise from muffler popping noise , keep looking and found that the decompression pin is shorter then what should be doesn’t stay out a bit shouldn’t it stick out some ? Also can feel and see the spring can this be why the bike won’t stay on or fire up ? I order a new pin and spring , just weird how it was running like that fine ? Please help

[@joshhaynes7910]

I have a 2006 Rancher 400 4x4.After rebuilding the top end and putting 200 miles exactly on the machine it bent a valve.i need to know what caused this.ive put 3000 dollars into this thing and cant keep throwing money at it.where should I start

[@ianwilliamson4285]

If I'm not gettin fire what should I check first? Your videos are awesome super helpful thx

[@PartzillaParts]

Plug, coil wire, fuses. If you keep testing down the system, you'll figure out where the spark stops.

[@bobbybeige2250]

Well I has no fire ,so what I did ,by the way this Papabear ,I've got a 400ex And 300ex on the 300 I went from the battery to the off and on wire coming from the switch on the handle bar and added a push button, wit a fuse between the battery and the off and on button just in case and my spark plug started fire, hit me back ,

[@bryantvarner2394]

This guy is awesome!Thanks for all your help.

[@TheTruthBeToId]

My lines dont line up straight to the head eather the rear is a little high or the front is. The only way to make it even is to move the F or T to the front a little. Thos also happend with a 250cc hammerhead I had.

[@calebdooley7543]

I have a 07 400ex I've messed and played with the timing it's getting a good strong spark and it's getting fuel but it won't start it'll just back fire once out the carb any idea on why it's doing that or how I can fix it

[@PartzillaParts]

How did you mess/play with the timing? It is possible that you might have bent a valve. Do a compression test so we can see whats up. I can show you how to do that here. kzbin.info/www/bejne/kJ_Eg2iogtmmiM0

[@bellydump-hf7ec]

Have 02 trx. began smoking, stalling and the exhaust got red hot. it came out of it and was fine for a while now it won't start (fire) at all.any suggestions?

[@denzelderksen7564]

I was doing some snow drifting on my 2003 400EX in 4th gear and it stalled and wouldn't start. So I did a compression test and it had less than 1 psi. I also found out that air is being sucked from my exhaust when I try to start it. What do you think is the problem?

[@PartzillaParts]

You're going to have to dive into the top end. My guess is you blew a valve.

[@leslieringstaff3922]

How do you pull the chain up up and move just a chain and then put it back on the Cam without moving the flywill when you move the chain

[@samuelmartz1876]

I wish u guys would do one on a 06 trx450er on how to put the motor in time where it needs to be and everything have a hard time with my and their isn’t any videos on you tube

[@pacman3908]

Thanks for timing marks info 👍

[@bobbybeige2250]

Mine still won't start ,however before I change Ed the head it started up great

[@jakehamilton8544]

Do you mean take the bolts out of the timing gear?

[@noahbrown6302]

I have a 2007 Honda 400EX I was going to put a 440 big bore kit on It, put it all back together and it won't start I've watched the video how to time it and it still won't start any ideas

[@BobbyBradford-sq3uc]

How can I find out if I have the cam 180° out on the front cylinder of a nt700v

[@derekjohnson159]

How do I keep the fly wheel from moving to set the timing on a 1985 honda fourtrax 250

[@connersnow298]

Awesome vid and edits and filming and shopsand bike

[@jentryvh2122]

Is that the same foe the 04 modle

[@MrBlackMods]

You should really put something in your last video to inform people that you have to do this before you try and start it .Hopefully I didn't damage anything trying to start it .

[@cakeslice9930]

got a Honda fourtrax 300 is it possible for the fly wheel to be on wrong have set timing twice second time of doing so my valve got bent timing was perfect.

[@blakelynch2364]

great video but i have a 1996 honda 300ex and i cant find any videos on how to set the timing is it the same as this one or no i need to know quick bc racing season is here and my atv is out of time and will not run right PLEASE HELP

[@PartzillaParts]

We don't have a video for that right now. We will add it to the suggestion list! If you're on a time schedule, might be worth taking it to a shop this time around.

[@oldmanmtb1443]

Hey John got a 97 xr400 it's hard to kick it over and the decompress lever doesn't change anything. After about 5 mins of trying it might start. What can cause it too hard to kick or turn over. I can kick it sometime and it get stuck on the compression stroke after a few tries it will finally turn over but not start the and the cycle recycle.

[@tannertyrik6251]

deez nuts improperly adjusted valves

[@coleroggenkamp7840]

Thanks for the awesome video got me going again!!

[@mikecal516]

If my cam lobes are not facing down would it make it tick? I’m very stuck on where this tick is coming from on my 400ex. Apparently the whole top end is rebuild with new timing chain. Maybe the tensioner is loose? Need help please

[@PartzillaParts]

Tensioner would be more of a rattle than a tic.

[@redneckwalling2057]

Videos on 300exs plz would be nice I'm working on one now and can't get it going

[@jasonstewart1469]

So since the rebuild and new rings whats the recommended breakin procedure for the piston / rings?

[@PartzillaParts]

Same as break in for a new unit. I believe it's 10 hours for this unit. Easy into it.

[@jasonstewart1469]

Thank you. Service manual seems to leave that out.

[@ryandurfee6981]

I have a 98 Honda Fourtrax 300 4x4 and am wondering . How do I know When I'm on the "compression " stroke or not when I go to set TDC before installing my timing chain and cam Thx

[@PartzillaParts]

When you set the timing mark to TDC, you want the lobes to face down.

[@rushweaver2807]

Fantastic video! Thanks a bunch! Is this same timing used with a bunch of hondas vtwins around this year?

[@PartzillaParts]

Hello Rush. unfortunately this guide does not pertain to Hondas vtwin engines.

[@rushweaver2807]

Partzilla could you make a video on vtwin cam timing please?

[@trevermatern2783]

would this be the same way for timing a trx 300ex 2008?

[@johsmith9149]

What's the best way to get the timing chain on the bottom sprocket I cant seem to get it their

[@latunguley]

Would you apply this method to the TRX 300 ex models as well?

[@joshclopton4255]

Is it roughly the same with the 700xx

[@killerzone1002]

Jhon i have a question? If i install a stage 2 hotcam for my 2006 honda 400ex does thAt mean i have to change the timing too? I left the timing like for a stage 1 and the front valve bend damage the piston and the header what should i do?

[@PartzillaParts]

Sounds like the timing was off. Normally, Hotcams would state if you need to degree in the cam. www.hotcamsinc.com/ProductInfo.aspx?item_id=21

[@jsvallee567]

nice video that help me a lot thanks from quebec canada :)

[@PartzillaParts]

+js “honda racing” vallée: Awesome! Thanks for watching, JS.

[@micahdeblecourt5652]

Will this timing video and engine rebuild video apply to my 2002 trx400 ex when I install the 440cc piston and cylinder kit?

[@PartzillaParts]

Yes, it should work for that as well.

[@IceStone69]

I have an 2001 400ex is everything the same on my model?

[@aleksa8955]

if you can help me for my Suzuki dr 250 how to fix the camshaft and where should the piston down or up?

[@YAESUMEN]

Good job, thanks for interesting videos.

[@nataliekindle7715]

hello i just rebuilt my 04 400ex and put a 416 kits and hotcams and it just doesnt seam to have anymore power then it used to

[@lauradeitz6538]

So i am doing this to my 04 400ex. Lobes are down, timing marks are correct, I at TDC my bike will fire and run for maybe 5 seconds then shut down. All my valves are adjusted properly she just won't run. Any suggestions?

[@PartzillaParts]

If all the mechanical parts are correct, it will boil down to electrical or fuel. Best guess would be fuel.

[@michaelgoodman3054]

How do you loosen up the timing chain to get the timing on its markes??

[@aadamlachporia9208]

Is there a video for the trx 450 like this ?

[@ronniedasher5699]

Not quite what I was looking for I have a 2003 250EX Honda no timing change whatsoever how do I set the timing just did copy and job but not crank

[@texqee7826]

How do you fix it when you do all that and it's backwards and it's firing the wrong valves at the wrong time

[@thomaszimmer4724]

Is it the same procedure for a 2004 trx 400ex?

[@PartzillaParts]

They didn't change much on those quads through the years. Same process

[@thomaszimmer4724]

Partzilla perfect thanks

[@jbemba25]

Yes

[@scoutdoors2692]

My 1996 Honda 300 I did a top end kit on it and its blowing air out the carb instead of sucking in but its blowing air out the pipe what do you think that is?

[@PartzillaParts]

Compression, valves or timing. Usually it comes down to timing or a valve not seating correctly.

[@mrrod805]

what size key do i use for the big cap?

[@tylerhoyle5295]

Ya ever find out because I need to know?

[@isellfades2015]

What if mine keeps jumping after getting tdc? After riding for about 20 min

[@johnnyrichmond9063]

Where is a piston located ,when you Put. It in time. ? Top or bottom of the jug head.

[@PartzillaParts]

Top.

[@julioaguilar3439]

Do you guys have a video how to check the timing on a 2007 TRX 450?

[@PartzillaParts]

We don't yet, but we have added it to the suggestion list. That's a popular quad.

[@RandyB509]

Just found the vid ty

[@alanlucas6504]

hey I got a 2005 Honda TRX 400 i just did a top-end rebuild and the valves are ticking what does it mean. already adjusted valves and still ticking

[@PartzillaParts]

A little ticking is normal on this motor. Be sure to do the valve adjustment when the engine is warm, it will reduce the ticking when riding.

[@benjaminbartsch1182]

Hey I did the timing on my sons 400 ex as u show on the video and I have done it before. But this time it's not working. When I start the engine it gives only one fire . It just won't run . What could it be ???

[@PartzillaParts]

It could be literally anything. If you just did the timing, confirm it's correct and check valves.

[@killerzone1002]

for a 2006 400ex hot cam stage 2 is it the same? or do i have to go back 1 teeth on the sprocket or maybe forward?

[@KAOSshortyrip]

Answer?

[@caleblogan1720]

I'm still confused, when I get the timing mark to the "T" position and put in my cam shaft with the lobes down how do I know if the cam shaft and the motor are on the same stroke? If you can try to explain it would be greatly appreciated!

[@PartzillaParts]

Hello Caleb. When you set the crankshaft to the T position, and install the camshaft with the lobes down it puts the rotation assembly, and the valve train on the same stroke. I hope that is a good explanation for you.

[@caleblogan1720]

Partzilla okay I think I have it all together right, I just didn't want to start it up and have a problem. Thanks the videos helped alot

[@suzukiz400xcrider6]

hi can ya do a video on how replace one way clutch ?

[@wpearson8017]

great video. is that the same type of setup on a honda fourtrax 300?

[@PartzillaParts]

I am sorry, it is not the same setup as the TRX-300

[@motoportusa4148]

I've set timing on these things quite a few time this same way. This time around im having a issue when the tdc mark on the flywheel is lined up the piston is not at the top of the stroke. when i use the timing mark and then set the cam timing properly it will get to a point when it will not turn over by hand and seems to bind up. I don't think i'm 180 out because I've messed with all my different options. if I get the piston to the top of the stroke and then set the cam timing it turns over nicely by hand. Any advice on what im doing wrong?

[@KAOSshortyrip]

Did you ever get an answer to this

[@talada955]

Are lobes down the compression stroke?

[@jbemba25]

Buena información.. pero las levas de admisión para donde quedan

[@adampaolucci9341]

Does the gasket for the valve cover need to be replaced when taking the valve cover off, or is it one that can be re-used?

[@PartzillaParts]

Generally speaking, rubber gaskets can be reused, but the paper gaskets we recommend replacing.

[@adampaolucci9341]

Partzilla Okay thank you, the valve cover one is rubber, correct?

[@PartzillaParts]

It varies by model. The TRX is not rubber.

[@adampaolucci9341]

Partzilla Okay thanks.

[@zackpatterson6216]

Does the timing have to be directly on the T or the line before? My cam line is up just a little on one side.

[@captaindeadpool1640]

What did you find out?

[@scotty-jn7uo]

Is there anyway to tighten the timing chain because mine is real lose. or do I have to get a new one????

[@PartzillaParts]

You can reset the cam chain tensioner. If it's still loose after a reset, it may need replacement.

[@matt.larsen]

is this the same for a 300ex?

[@ericross1901]

Good videos

[@garthmorris8612]

Ok I'm rebuilding my top end but for some reason, doesnt seem like enough slack to get the chain onto the sproket??? Help please!!

[@njmxjunkie3128]

I know it’s late but you gotta unbolt the sprocket from the cam

[@530powerstroke]

does the motor need to be set at tdc when being disassembled

[@PartzillaParts]

It's easier to set it at TDC to inspect. You can always reset it in the middle.

[@SallyTucker-s4i]

It seems to be a tooth off one way or the other?

[@justynwilliams5306]

How can you adjust the valves how to set the time on a 2001 Honda TRX 300 ex

[@lifewithll2895]

Is it the same for a 1999 400 ex

[@silvershadow6288]

Would like to see a 2014 video

[@donhauser4613]

I got a trx 400 ex my cam stops turning when it hits the rocker arms

[@richardmoss5055]

Is it the same for a ec 300 cam timming its a 1995

[@juiced3421]

Do I have to redo the valves . If I’m just replacing the head gasket

[@PartzillaParts]

It never hurts to check them, but it isn't necessary if you are just fixing a leak.

[@juiced3421]

Partzilla thanks I’m about to take apart my 400ex to replace head gasket it . Do you have any advice

[@PartzillaParts]

Take your time, reference videos if you need to!

[@wijub]

how tight should chain be

[@williambrown35]

Thank you for the video.

[@justynwilliams5306]

Can u please make a video on a 2001 Honda trx300 ex

[@traceyeaves4606]

How to set valve’s with a 440 big bore

[@Papisartee]

What key is for the caps of the TDC caps