YZ450F Valve Check
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- Опубликовано: 25 окт 2019
- Here is a video about checking valves on a 2008 YZ450F. I ended up not needing to adjust them. I will film that later!
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“Oh well…..it’s still running” 😂
This was the best repair tutorial I've ever watched. Very thorough and not skipping steps. Thank you!!! First channel I've subscribed to. And my first comment to one.
Wow! Thanks so much.
Holy cow, was just watching to prepare to check the '08 I got recently, but I felt guilty when I let my oil get a bit dark but it's never gotten to be a lava lamp in any bike lol appreciate the video man great refresher for me as it's been a solid 10yrs since I've cracked into this generation 450
Thank you for posting this I’ve been wanting to check my valves and am learning the 4 stroke I came from 2 stroke so all of it is new to me
Right on.
Bro this was a great video. Just picked up my first yz450 and just getting informed about it through your Channel is awesome. Thanks for such rad videos 🤙
Welcome aboard! Glad to have you. I absolutely love yamahas
Great video. Clearest explanation I’ve found 🤘
Thanks for sharing your expertise bro!
That face when you saw the oil dump, lol I was the same :)
Can't wait for your race footage, have fun at that race!!!!!!!!!!!!!
Brad Lu thanks
Mad vid !! I got this same model,same engine. Helped a ton as I'm learning to save coin and keep it out of the shop everytime something goes wrong.
Awesome
I learned a lot, thank-you this was very helpful!
Awesome
Thanks for taking one for the team.. great video
Thanks
just bought an 06 and what a great video makes it look so easy lol and thanks👍🙏
Awesome man
Loving this channel man. Have been binge watching the vids. This one will definitely come in handy for when im putting the 426 back together 🤘
Awesome. Thanks for watching
highlandcycles he man my bike just kills in mid throttle while riding😩 2010 yz450f
@@freshaziisfreshaziis5064 Check out his video on the fcr keihin carb rebuild. Could be that or it just needs the jets cleaning.
I have a '00 426 and will never sell her, she is an absolute beast.
Cool video man I just subbed! Thanks!
Thanks so much
Great video especially lining up the cam timing marks properly on top dead before going any further, especially if you remove the cams shafts.
fantastic video. informative and didn't skip steps either.
Awesome video… very helpful
👍🏻
thanks for the video
Just picked up a 04wr450f for low. Will be using these videos 💪🏽
Awesome
Thanks for sharing 😊
Thanks for watching
Spark Plug Toque spec on this is 9.4 ft lbs. I only know this because it's the same as my 2000 YZ426F with same plug, and I'm going through a buddies bike with the same scenario this customer described. I found all kinds of stuff wrong on this bike which was gifted to him by his boss who hung up his boots.
Good vid man. I'll be subscribing to learn some stuff. What up from Adelaide Australia 👍
Alright!! How’s it going down there?
@@highlandcycles we really good down here thanks man! Still Ridin and ripping in on Sunday. Loving the old Yz450f 08. What to get next. Could quite easily go the new YZF 450 or contemplating the WR or sxf. The yz has been such a bullet proof rig over the years.
@@flstc93 I’m very bias towards yamaha’s.
Thank you great video. Even my 5 year old understood it when I didn't.
That's great!
Dude your so friendly and your video was the first one that I selected and have even ever seen on yz450 valve adjustment.
I am basically brand new to 450's and the whole 4 stroke dirtbike thing, and your videos are effective and pleasing to watch. Maybe its because you are Christian? Nah it cant be..........
Thanks man. I really appreciate the kind words.
@@highlandcycles bro in you other vid I suggested a head mount for 2 handed manipulation etc for overall better videos., etc...
Nevermind! because when you flip the cam back on yourself, for face to face, your head mount totally is going to be saying, HELLO!" lol.
Great vid
Thanks.
Thanks for the video I’m About to do the same thing to my 06 yz450 it’s been ticking really loud..
Gracias por comparir tu trabajo
De nada
Thanks for clearly showing me how true top dead center
How can you tell he needs a top end? Any recommendation on hours for a top end rebuild?
what a great video i know it wouldve sucked but i wish you needed to adjust the valves cause im really needing too and thats my exact bike but it has the worst time idling and starting so im thinking thats it great tip on the throttle too i noticed mine would start better if i held the throttle open for a little bit so that explains that
Hey Morgan. Thank you for you’re amazing videos. Question on timing marks. How far off the level with heads would you think it’s time to worry. My exhaust seems to be just right under level Maybee about level on underside instead of top , while intake is level on top like it should be.
Don’t have a perfect answer for you but that is showing that you have stretch in the chain. You really don’t want that to break so you make the call.
@@highlandcycles perfect thank you! That’s exactly what I thought. Looks pretty easy to replace.
Man oh man. I decided to replace timing chain. I’ve got that WR apart so much it’s stressing me out. Lol. Question. When I put it together it’s not rocket science for timing right? You line up TDC on flywheel and cover , put in cams with marks on outside shoulders of head. Reverse cylinder so cam lobes facing in at each other and I’m golden right? Do you know number of pins in between marks for a 16 wr450?
Good vid bro! Do you have a vid for replacing fork seals on a YZF?
Thanks. Yeah, here’s the link ruclips.net/video/S5iy1xfGwG8/видео.html
Is it the mark after the the 2 Mark's that look like an h or is it the opposite mark 180 out?
2017civic hatchback it’s the one right after the H looking one. The H is the ignition timing mark.
This guy has definitely been milling some metal in that engine. Any bike other than a YZ genesis would've grenaded
Hey man! I just subscribed, your videos are the best I’ve seen yet. I have one question tho, if I’m about to start a rebuild on my Rmx450z and it’s seized…. Can I disassembled the motor without doing the TDC as long as when I put it back together I set the piston at TDC then set the cams? Isn’t that basically re-timing and I should be good to go????
Your the only one who’s touched on the “it’s not the end of the world if you don’t set it to TDC before you disassemble”. Everyone makes it seem like it’s life or death and it’s starting to confuse me…. Any help is appreciated bro!!!
You definitely don't need to set it at TDC before disassembly. It is going to be in a million pieces and back before you are done. Just make sure you get it set as you go back together!
That's an 08 I had the 250 pain in the ass to work on the valves when checking them but other than that ,it's an easy motor to work on , really fun bikes if you know what you're doing, the only issues I ever had was maybe starting issue if it stood too long but normally not a big deal , it's normal for them , the fun bike to work on is the 2010to 2013 motors they're alot easier , but the 450 2005 is really fun shorter stroke but yeah didn't had alot of issues, but not everyone rides the bikes the same and treats it the same so depends on the rider
helps alot i didnt understand where the 3rd valve is on this engine, i am going to try and shim if needed my wr450f. at the moment the cams on the intake are kinda wonky. intake is pointing down and exhaust is where it is suppose to be. How do you determine which stroke is TDC? you mentioned two of them are technically it
It doesn’t actually matter. TDC is TDC but when everything is timed up one is compression and one is overlap but you can decide which is which with the cams.
@@highlandcycles the intake cam is very tight and exhaust is ok. every time i would turn the engine over before this vid to get it to tdc i would do it without the spark plug. In doing it now it sounds like there is air escaping. Im not sure if its from the exhaust or not. It kinda sounds like the head /piston area. Seems like head gasket or piston rings
just did some research apparently its normal. all engines will have some blowby i should have assumed thats what it was.
@@travisk1487 Yeah, They don't ever totally seal up. Hope you get it sorted out. You can always email me questions at morgan@highland-cycles.com
Hi so I changed all my valves with new and one of my valves is still too tight on the smallest shim and I didn’t have to shim up on any of the others and they had the smallest shim I can put in them what would I have to do to fix this a new piston?? Please help lol
You need to cut the valve seats and match them up
Just bought an 04 yz450f. Sitting for a year and it was really nasty in that gas tank and crank. I'm not a mechanic but between these videos on the tube and teamwork from my brother. We finally got it to run after like 4 days. Never had a 4 stroke. Still learning to be honest. Got it for a great price for the condition. Looking for the cam adjustment video. Can you help? First start was backfire hell
Cam adjustment?? Do you mean timing or actually moving the gear on the cam?
Good morning Highland.I am thinking into buying a Dirtbike How often the valves must be adjusted normally on this type of bike?
Should be checked every 30-40 hrs of operation
What fuel for 2022 YZ250FX?? Premium pump gas ok? (93 octane with ethanol) or this a problem and I should buy C9 race fuel only?
Pump gas is fine.
What should be the measurement in mm that works the valves of my YZ426f motorcycle? It has new valves and nails but I don't know what the correct measurement is
.012-.015mm
Thanks
If the valves are out of clearance do you have to re shim them ?
Yes
I'll get the valves in my yz450f 2014 what's the measurement in mm that I have to leave for you to have perfect compression in and exhaust ?
.005” intake and .007 exhaust.
@@highlandcycles ok thanks 🙏
How well would the bike run if the valve shims aren’t put in?
Not good
2003 Yamaha YZ450F Spark Plug torque is 9.4 ft. lbs. I just did mine and checked my manual.
I would also like to hear your thoughts on proper starting procedure as I currently am a first time owner and rebuilding mine. The manual says to absolutely NOT to pump the throttle prior to kicking or when kicking, but I have seen some guys do it and some guys not. So, I am wondering if a person really needs pump the throttle or would the motorcycle start up with out pumping. It would be interesting to run a test doing both methods.
So, I have found that when the bike is cold and the jetting is right, they really like a couple squirts of the accelerator pump to get started. Now, once the bike is warm, you don't want to give it any throttle at all. That again is if the bike is tuned correctly in my opinion.
i litteraly had the same exact problem on my 2006 450
What brand is your feeler gauge set and where did You get it
K&L and through a yamaha dealer. They were made specifically for these motors and they worn great in a bunch of them.
what would it mean if the cam lobs are blued
I know it means there is a lot of heat there but what would cause the heat
Great question. Normally excessive heat in cams comes from lack of lubrication. That can be low or no oil or really dirty oil. We see it a lot with bikes that don’t get the oil changed enough.
@@highlandcycles my Ttr250 that's the old school bike I noticed but I can't remember which on was blued.. I wanna say exhaust. It's the bike i was asking you about to rebuild. Lots of hours on bike. I am thinking I will throw a compression tester on it. Bike runs and starts ok... common starting clutch issues. I need to replace the spag
AJ Re yeah, I’d do some tests and make sure it’s not going to be a mountain of money to get it all spruced up. But honestly those bikes are great put put trail bikes and can be street legal pretty easy. If the cam surface is still in good shape you can run it even if it got hot.
@@highlandcycles that was gonna be my next question. I think I remember the lob looking smooth and good but just heat colored. I am gonna pull the clutch cover and look at the oil screen. And there is a bolt the manual talked about for checking oil pressure while the bike is running, might check that too
Hey man I got a 2014 got 5 mechanics cannot find what’s wrong the bike starts flawlessly cold once it’s warm runs horrible and has a hiccup on the low end power band almost like I’m in the wrong gear but I’m not it’s driving me crazy any help would be greatly appreciated
Check the stator.
Once it is at top dead center and the cam Mark's are parallel with the head. Should the cam lobes be in the same position facing away from each other? Once mine are set they are facing away from each other but not in the same position.
That’s ok. They aren’t exactly the same
@@highlandcycles the head was between the 2 stamped Marks on the exhaust cam. I rotated the cam to align it right but now no start. Thinking I may need a spark plug. It did back fired while kicking over but no crank.
@@stevenhowell663 hmmm, I’d try a plug and then quadruple check your marks.
I have a 2012 yz250f my exhaust header gets super hot when I first start it and it doesn’t have a whole lot of compression any advice on what it could be I have been told my valves might be off but not sure thank you.
Could definitely be tight valves.
Thank you!!!
Does it matter what type of shims I get or does it depend on the cam?
So one of my valve shims is set to as small as I can go and it’s still tight I went from a 160 to a 120 what does that mean?
It means you need to replace your valves
Should I replace all five or just my intake valves and thank you so much man you have helped me so much
At how many running hours this maintenance should be done on the yzf450? This wouldn't be a cheap SM bike to own, right?
Every 40 or 50. It would be good but wouldn’t be awesome for long range riding.
@@highlandcycles what would you recommend as a SM? Something under 2010 as the budget wouldn't allow me right now to get anything crazy.
Phil Mycock that’s tough. I like the older XR’s. 600’s and 650’s. They can handle a ton of miles.
Does it matter what brand of shims you get for your valves?
No. But I use the hot cams ones.
Hey my bike is acting like it get stuck and won’t move when I go to kick it my exhaust cam is pushing down on my buckets and it won’t rotate I just had them re seated and the valves are in spec what could this be because I can crank it by hand to that point and that’s it
Sounds like the cam is out of time
Do you think it’s me putting it in wrong bc it never did it until I had the shop re seat them?
@@tannerking1683 yes
Would the process be the same on a 03 yz 450
Yep, just easier because the frame is smaller
I got a 99 yz 400f, it’ll start by pulling it off, but won’t start kick starting, also once it starts by pull starting it, I’ll ride it for about 20ft then start slowing down, once I slow down it’ll just bog down, what could be the issue? I cleaned the carb 4 times, checked valves, anything else it could be?
Could be spark
@@highlandcycles alright thank you, just bought a new plug so I’m gonna try today
@@highlandcycles will tight valves cause it too feel like it has no compression? Cause it feels like it has none, but I can get up to 5th and it runs strong.
Please help! Hot rods crank does not fit the oem flywheel?!?
You sure it’s for the right year and model?
@@highlandcycles the engine is put together, but I haven’t found anything about the diameter change between years. Mine is an 05 yz450
@@chaser1357 WR motors had a different sized crank.
@@highlandcycles wow. Dude. Bravo. Hope you’re right.
I may have to do the same to my 2010 yz450f fuel injected, it takes alot of kiicks and then the bike runs for a while but I keep it primed and then it runs and a later it kills in mid throttle while riding it makes a peeew sounds and dies😩
Could be that and I have seen some of those have fuel pumps going bad that do that too.
highlandcycles I changed the fuel pump, mass air flow, gonna check the plug again, might not be all the way in I guess, do you have a video where you actually have to adjust the valves??? Thanks
My 2014 yz450f bogs top end of every gear when warm???
Might need a bigger main jet?
@@highlandcycles wouldn’t that do it cold to
@@klagster534 Yeah, you are right.
Anyone know what I'm looking at to get a mechanic to rebuild my yz250f 2002 motor csnr find anything anywhere for these bikes it's crazy and beofte someone tells me it's not worth getting a yz250f 2002 rebuilt yes I know I'm stupid but 😂😬 but something I need to do motor still runs but with 99 hours and very low compression.
Hey I just did a rebuild on my 04 yz450 and I'm having some troubles with the valves I was hoping to get in contact with you for some help
can message me at facebook.com/highlandcycles
So I have a problem my kx has a bolt in swing arm for tightening chain it is stuck I'm afraid I'm going to break it off ! Have a trick ?
Heat and PB blaster. That sucks. They break a lot.
Do they make something to use that is better than oem bolts ?
And thanks for information !
@@kellylargent2634 no. You just have to put anti seize on them
What should the compression be on a 99 yz400 ?
Somewhere over 160
Mine is showing 60psi what could be wrong and also my valve shim buckets are stuck. Do I have to remove the head 🤔? Thank for replying
@@mmar4281990 could be a bent valve
Cool video hope the customer bought some chain lube on collection😁👍
I am sure they did. This was a while ago.
Love the flag bud!
Thanks
Very inspiring brother thank you!
If the valves at about .05 mm out of spec on a 2012 yz450f could that be what makes it hard to kick start? The clearance is higher than what it should be. Not tighter.
That is probably not the issue
@@highlandcycles do you have any ideas what I should check next? It starts when bumped but doesn’t want to kick start. Rides really good once it’s started.
@@Romn58 maybe change the pilot jet. Go up one size
@@highlandcycles it’s fuel injected. I should probably check the injector then.
@@Romn58 yeah. Oooops, didn’t look at the year.
No sealant on the valve cover gasket?
No. As long as its in good shape you don’t need it.
highlandcycles good to know thanks.
I like your videos, did this one need a valve adjustment?
I didn’t. We checked it and it was ok
Oh, okay, I thought you said intake was over 6 thousands. Better than being to tight.
That's my go to ratchet
Cool vid, very nice!
Koby Ben Yakar thanks
I have a 08 klx 450 it’s leaking oil out of the top of the valve cover
highlandcycles I have a 08 klx 450 it runs good leaks oil out of the top of the valve cover what could it be
Will this be the same as a 2006 yz450f?
Yes
@ 8:43, to the ride side of your screen, that chain sprocket - how tight is that puppy supposed to be? Mine was loose, with that thin flat washer, than the nut sits on, bent over the nuts edges, to stop the nut from loosing and backing out. Now I dont know if that bend was intentional, because that sprocket maybe needs some type of wiggle room/play, but yes that whole sprocket was LOOSE. I snugged her up and re bent the washer, but shes snug now. Makes me wonder what kind of discoveries I will discover as I now check this 1st yz450 of mines VALVE CLEARANCES...
Oh I will be coming to you very soon with that info. Thanks for taking up the role of being my teacher.
STIZEN9 that nut is supposed to be tight and the washer is supposed to be bent up.
@@highlandcycles bent up as in the opposite of bent down, so you mean flat, like a washer is supposed to be? Bro also, where is a good place to acquire a shim set or maybe individual shims, and what brand name is good to use? I like quality, but I love saving money! Any good generic or china shim suppliers? THANKS BRRRRRRRRO
@@STIZEN9 relax dude your crazy. Buy a hotcams complete shim kit. the 9.48mm diameter set fits yz 450 f. Its a 1.2-3.5mm shims kit.
Is this same for yfz 450 ?
Yes
I see you're in Colorado. Where at?
Montrose
So is the .003 the least amount of clearance meaning that valve is worn more than the valves with .006 clearance? As I undersand it as they wear the valve clearance reduces?
Also the specs for my 2012 yz450f are
Intake - 0.10-0.15 mm
Exhaust - 0.20-0.25 mm
You are right about the differences and that the valves wear up into the head. And those specs are in mm and I was using inches. Mainly because that’s how I’ve always done it but the end result is the same.
@@highlandcycles so then say my intake clearance is 0.08mm then I would need a smaller shim to bring it out to 0.10-0.15mm to be within my spec?
Brian Bevans correct.
@@highlandcycles Good deal. Thanks for your help! I'm about to do mine tomorrow & this was very helpful. It was straightforward to the point without all the excessive blabbering like most others as well as entertaining. Liked & Subscribed!!! Look forward to see more related videos in the future.
Brian Bevans thanks so much.
so how much would you charge for that job
1 hr. $90
@@highlandcycles You are a saint. My dad was a small engine mechanic and would charge similar rates, so it's nice to see an honest, hardworking person charging an honest rate. If i took my bike into you unable to run, and you gave it back running for $90, I'd be more than happy. Bigger shops charge so much it's insane people actually use them for things like this.
aprendi hoy como reparar
Bueno
I thought you were gonna show how to adjusted the valves when in fact you only showed how to check them. I liked the video but feels like it should say how to inspect the valves not adjust them lol.
Yeah, I know. I was expecting to need to adjust them. Sorry for the misleading title. I will be doing an adjust one when I get a bike that needs it.
@@highlandcycles I'm looking at buying this 2012 yz450f but the guy says the valves need to be adjusted because they're ticking. I came here to see how much work it would be. I found another video and it seems pretty intense. Just curious how much does something like that cost?
@@army96261 We charge 1.5 hrs for adjustment. That is $135 for us. Plus shims. But here is the deal. Overhead cam motors don't tick when valves are loose unless they are WAY loose and that usually means something bad. I would have someone listen to the thing that knows them before you buy it. There are some things that could be wrong that could cost a bunch of money
@@highlandcycles thanks for the heads up. The guy sent me a 30 second video of a cold start so I can hear it run. I'm gonna post it to this bikers Facebook group I'm apart of and see if anyone has any input. If there's anyway I could send you the video or even just post it on my RUclips page and have you listen and give me your advice that'd be cool.
Jeffrey OHara yeah. Send it to morgan@highland-cycles.com
All it did was foul out the spark plug i could tell just by when you took it off
yep
How 'bout cleaning the crud off the valve cover et al before you pull it apart? That crap WILL find its way into the exposed valve train when you pop it off
That oil how dark and dirty it was I wouldn’t just suggest top end only poor bottom end as well. Some ppl just ride and never do any maintenance.. poor bike.
So sad
Same spark as Yzfr125 can’t be right surely
Good video man but you should be cleaning everything before you put it back together
I have a ? About this same bike ok my problem is i in stalled a new water pump ight I know this is going to sound bad after a fresh big bore rebuild new cases all 1000 dallor stage one Tokyo carburetor stage 2 cams Allright back to my fuck up literally as I was taken side cover off I remember that the kick start washer fell down behind the bottom gear ok well I was destracted came back to it next day finshed install crank it up nt thanking nothing of it at all letting ideal war up the I was going to cut it off an check fluid an so forth will as it was idling it just said tenk tenk an shut of ok well now I was like fuck 5000 dallors for the hole rebuild down the dran ok well I fished most of the washer out the bottom end my crank turns over by hand its nt locked up as far as the piston rotates an all but my kick starter looks up as soon as it starts to go down I was like well mabey bad kick start gear ok well I can Possibly bump start it but as of the other day in trying to do that I took of running with it letting out the clutch for it to drop in gear an nothing she continue to roll I was like wtf man then I was like ok let me put it in every gear an she continue to roll like it was in nutreul ther was no lock up in the back tire at all any help would be great im will to pay a 100 dallors through pay pal for atleast some information before splitting the case im am a mechanic an all that an im inclinded on cars trucks suv an done everything I could come to conclusion with with out splitting case is good but any help I watch ur videos with the came timeing basically just like a car timeing an all it was help full thanks any ideas
That sucks but it happens. Unfortunately it probably screwed something up in the transmission. I’m afraid you’re going to have to split the cases again. You might get lucky and find something wrong on that right side and I would check that first but it sounds like something inside. It’s probably not too big of a deal part wise but you’ll have a bunch more time in it.
@@highlandcycles thanks guy i mean I have went over everything possible with out splitting them but crank spins over an I have a free spinning back tire in all gears no drag at all but am glade all most got unit off frame but I was wondering to ok I got a Wesco clutch basket and screws could It be bind up cause the clutch basket gear i pressed out mabey in stall rong or washer I missed
Change the video name to checking the valves. There was no shimming or adjusting if anything.
I know. I should do that. I have lots of other videos actually shimming them.
Shame some guys own bikes and expect they never need any maintenance or oil changes ever. Would be better off with a 2T
Agree
Its still running lol
Hahahahaha
wow, that oil looks terrible
Terrible mechanic to tear the engine apart before even checking the plug haha
The customer asked us to check the valves. That’s why he brought it in.
All that work only to realize the spark plugs loose. Engine mechanics 101, check for spark, fuel, compression :) I would be pissed if he did that to my bike.
The customer wanted a valve adjustment anyway.
Call me silly but I could have sworn I seen him checking for spark like I'm sure everyone else does with the plug out up against a ground 🙄
Seriously, why do all the guys that ride MX still wear the same shit they did when they were 12 years old?
Weird how most of them have criminal possession charges too.
Huh?
Hold the camera still, you make me sick.
We have better cameras now. And thanks for spending energy saying negative things about a free video.
Misleading title. No adjustment, just checking valves. Wasted my time
ruclips.net/video/NH12rWgM-ps/видео.html