400EX/440EX ATV Build Installing New Timing Chain step by step in the bottom end

[@mjg0528]

Thank you so much Im watching your videos to build confidence to do my bike keep up the great videos

[@garagemcmatt]

Thanks bro I really appreciate the comment. Biggest thing you could do is stay organized and take pictures of each step or piece you take apart. Feel free to comment if you have any questions. Get yourself a manual as well.

[@ElSlickVic]

How much would a fair shop charge for this?

[@garagemcmatt]

@@ElSlickVic honestly bro I'm not sure I've never taken something to a shop in my life. But if I had to take a guess I'd say somewhere between $300 to $600 depending on what parts you choose (brand of timing chain and gaskets) probably would charge the hourly rate of the shop times the amount of hours plus parts.

[@skittlesmodz2939]

How are torquing down the nut for the timing chain gear without it spinning? Do you have a wrench on the other side of the bike where you check and rotate the nut to find top dead center?

[@garagemcmatt]

@@skittlesmodz2939 you can either do that or if the cylinder and piston is off you can put a pipe through the top of the rod and rest it against the case where the cylinder meets the case or use a clutch holding tool like in the video on the inner clutch boss

[@stoneycarter5546]

Great video you did a wonderful job on explaining how things works thank you

[@garagemcmatt]

Thanks bro I appreciate it

[@DbflooringBeck]

Great detail video man

[@garagemcmatt]

Thanks bro

[@chrisl8674]

Awesome step by step video. I have a 2007 400ex and looking to replace the timing chain. Do you have a parts list? thanks!

[@garagemcmatt]

Timing chain, chain sliders, clutch cover gasket, head gasket, rocker cover gasket, oil, filter, Just grab a complete gasket kit from tusk.

[@chrisl8674]

@@garagemcmatt Chain Sliders? Do you happen to know the OEM part#?

[@garagemcmatt]

@chrisl8674 no not off hand. Go on rockymountainatv.com and go through the oem parts diagrams

[@markboza6215]

If youn look at the top of your oil pump you will see were the chain was riding on top of it ,thats were alot of the shaving came from,pretty comin when the chain gets really stretched

[@garagemcmatt]

I know what part your talking about that little sliver of aluminum on the pump almost like a guide

[@actionislive69]

#portedhead bro love the step by step videos always nice to c and know how things get taking apart then properly put back together. keep up the great content my dude PEACE

[@garagemcmatt]

These 400ex's are not hard to work on idk why everyone I get is so messed up

[@Country_tuff]

Why didnt you put the crf 450 chain in for the upgrade

[@garagemcmatt]

This was a customers quad and he supplied the parts. Sometimes people want what they want. But I prefer to use the upgraded chains.

[@blayneerwin9276]

#portedhead!! Got to love a step by step

[@garagemcmatt]

More to come

[@arturomedina5746]

#portedhead. Another great video I enjoy these step by step. A lot of info did u find out what those black plastics where? The ones in the case... Arturo Medina.

[@garagemcmatt]

It was strips from the chain sliders

[@garagemcmatt]

Making a similar video but on a 400ex with reverse

[@Hyngyynj]

If I saw those big ass metal chunks in the oil screen I would assume the engine is toast. Is it not?

[@garagemcmatt]

It's not that uncommon on something that was not taken care off. Most of it was rtv chunks

[@Hyngyynj]

Okay good to know, now when I tear into this 400ex I just bought and it’s full of junk I won’t be as pissed 😂thanks for the reply

[@garagemcmatt]

@@Hyngyynj I reply to all my comments. If you see really big pieces inspect a little further but little pieces like u seen in the 400ex is not great but its ok there were no gear pieces

[@Idiotcental]

How do you put the shift spring back in

[@garagemcmatt]

Slides in from the right side to the left inside the clutch cover. As far as how to put a new one on the shift spring I think I covered that in my 465ex engine video

[@stoneycarter5546]

Please help I have a 2005 400EX it has a 440 big bore kit my problem is its putting oil out the breather hose bad if I hook the hose up to the air box it sucks the oil out really really bad fast new rings jug Wiseco made sure rings was right What could be the problem please help !!! runs great no leaks

[@garagemcmatt]

That's default wierd problem to have. If it was a 2 stroke I'd say you have bad crank seals but being a 4 stroke without being able to see for myself, it might have too much oil in it. I'm sure you checked that tho. It's a tough call not seeing it

[@stoneycarter7789]

It has 1.9 Quarts of oil but then it doesn't read on the dip stick after I start it in the morning I let it idle for 4-5 minutes and turn off let set for 3 minutes and it don't touch the dip stick dry then if I ride it oil blows out the breather tube bad .

[@RickyLangford-i9f]

Sounds like the oil not returning back to the oil reserve tank. 400ex motor oil don't stay in the motor it cycles how much it needs into the motor maybe something is blocking the return and making come out else where.

[@leslieringstaff3922]

Question I have I have a 2000 model 400 EX yes had a headgasket leak and on it it's starting to run fine I mean you just hit the button and fire right up that was leaking out of the head so I tore it down and put a new headgasket in and bow cover gasket and all that and I watched the video of several videos I had to put it in time in time the only thing I got I don't understand I put it to the T mark it's not completely lined up with the glue groove in the low eyesight and IA low eyesight and I was wondering does it have to be right in that eyesight right rush out of the groove part Or can it be just a little bit to the left but still be an eyesight and will that keep one from not running I don't understand why it's not running because it is fine it is fine and the vials are going up-and-down Going up-and-down like it's supposed to and it's fine but it will not start I don't understand what I'm doing wrong but the question I have I know the Cam globe's gotta face down and you got 2 time remarks on the Cam gear that's gonna be level with the head but what I don't understand I've done that and have the tea in the eyesight but it's not in the underneath the groove part of the eyesight and I was wondering does it have to be right on that mark Is that maybe why my 4 will not start not start please if you can help please please call me 270709 2868 I am really about ready to pull my hair out I just don't know what I'm doing wrong and I guess the main question I'm asking you is when I Linda cama and a low's been down and you see the T mark does it have to be directly underneath that little groove in the eyesight

[@garagemcmatt]

The t mark can be a very little bit off the mark. E mail me at [e-mail] And you can send some pics I'll try to help u out if I can

[@SiscoK1D]

You like the 440 or the 426 more?

[@garagemcmatt]

Honestly I only rode the 440 I put together for a customer for a very short time but I liked my 426 better but the 426 was also Ported and polished and had a stage 2 hot cam. I'm probably gunna make one of these a 440 so I'll have a better basis for comparison of each big bore kit all built by myself stay tuned bro. Thanks for the comment

[@SiscoK1D]

@@garagemcmatt I'm just gonna call bpr and get the same set up as you. I've had my 400 since new in 2000 and you've inspired me to completely pimp it out

[@garagemcmatt]

@@SiscoK1D that's awesome bro what kit are you gunna go with? 426

[@garagemcmatt]

@@SiscoK1D make sure you use my promo code at bpratv.com (gmc10) for 10% off bro ask for Jaymes Welch

[@SiscoK1D]

@@garagemcmatt I talked to Jaymes and got Basically got the same 426 kit as you. I'm gonna replace the clutch and get a sparks full exhaust. Then new suspension, redo the frame and everything else lol. Once you go all out you realize every bearing and bushing is smoked as well

[@Hyngyynj]

Can you do this without taking off the cylinder

[@garagemcmatt]

Yes the cylinder can stay on but the head needs to come off to access the front chain slider. You might be able to drop the rear slider out the bottom with the head still on but idk who would only change one slider

[@justinm6110]

What brand of timming chain do you use?

[@garagemcmatt]

It was just a stock replacement for this quad but if your gunna order one either get a wiseco or call my boys at bpratv.com and order a heavy duty timing chain and use my promo code gmc10 for 10% off

[@jamesmatushin5457]

I had a whole lot of out in my couch cover what's that mean

[@garagemcmatt]

Made this video a while ago bro. What are you asking me?

[@Austin_Gasman546]

Duh hell the fly wheel holder tool called 😂

[@garagemcmatt]

I couldn't even think that day bro lmao

[@pbedrook]

Wats name of pliers use to hold pressure plates

[@garagemcmatt]

Clutch holding tool

[@garagemcmatt]

Go on ebay bro I think it was like $20

[@pbedrook]

I did i found it

[@garagemcmatt]

@@pbedrook cool bro. It's a game changer

[@gostheelitecoco411]

@@garagemcmatt what can i use if i dont have one

[@red_screen_junky3089]

Do you have an actual shop? Or a way to contact you? I am having hell with my ex. It’s a lot easier to tell over phone rather than comment on here. Lol

[@red_screen_junky3089]

E.x. Not my ex..😂

[@garagemcmatt]

This is just my hobby I don't give out my cell number. I do have an email tho it's [e-mail]

[@red_screen_junky3089]

@@garagemcmatt email works. Just need to pick your brain a bit.. I’ll shoot you a email shortly

[@tmljml1]

No need to remove oil pump.

[@garagemcmatt]

I always remove them to clean them out and for good reason this one had junk in it. But yes you can just pull the primary gear to replace the timing chain

[@ryanfowler3873]

#portedhead The bottom end had a lot of junk in it

[@garagemcmatt]

Everyon I split open has junk in them