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- čas přidán 8. 09. 2024
- 2019-2022 YZ450F full motor rebuild. Replacing the crankshaft, piston, and cylinder. The like mentioned in the video about removing the top end is at the following link • 1:11 Top End Rebuild. ...
Donate Race Fuel link... www.paypal.com...
Thanks for watching!
upallnight91@hotmail.com
I'm not even a rider however I'm a ex lexus technician that always wanted to get into dirt bikes. I must say you did a hell of a job doing the work and recording in such fantastic detail !! Thank you for your hard work and for inspiring me and all techs and riders alike.
Oh man thanks for the compliment I appreciate it and also thanks for watching!
Bro ive been going through all your vids for 450F from suspension through to top end rebuild you make it easy understand and follow. Even with bare minimum tools and really no special tools either. It has given me confidence that i can perform this myself thank you 👌👌👌
Your welcome! Nice to hear this. Thanks for watching and hope you stick around!
@UpAllNight91 hey mate one question I have is there much difference in the rebuild process of the 2021 to the 2022 yz450fs
@@aussie_mt_09_sp46The 2021 and the 2022 is pretty much exactly the same. You will be good.
@@UpAllNight91 I'm not a mechanic but is it the same for a 2018 yz450f
@@kohatutata1603 Very similar. Only a few very minor differences.
by far the best video for 2021 yz450f motor rebuilds, extremely in detail, thank you!
Thanks man! Appreciate that, and thanks for watching!
Awesome job, you did a great job explaining. It’s been 10 years since the last time I’ve had a dirtbike engine apart. Was super nice to watch a pro go through the rebuild. I don’t even need a rebuild 😂
Thanks! 😂
Bro i setup the laptop in the shed and followed your video step by step! Bottom end rebuilt today , head goes on tomorrow. You are the man!! Never done a bike rebuild before but you make it so easy! Thanks alot. Scott from Australia
On man thats too cool! Let me know how she turns out and if you have any questions along the way. ;)
Hey man motors in, heads on all complete, went to try kick start it and wasnt having any luck, i found that the clutch wasnt disengaging when in gear, pulled clutch cover off and clutch basket out to check rod movement and i cant get the clutch basket back in! Tried for an hour or so! Is there a trick to lining up the gears for it to seat fully?? Thanks alot!
@@sbarnett6720 I usually just spin all the gears and basket and all that till it lines up with all the gears and slides all the way down. Its easier to do this with the inner clutch cover off so you get full view and access. Hopefully that helps
I watch the whole video and I don't even need a rebuild
😎 Thanks for watching!
Me too and I just finished it 🤘🏽🤘🏽🤘🏽
How did you come about finding out you forgot to align the counter balance sprocket @upallnight91 ??? Did it run weird?
Thanks for this video just did a full rebuild on this bike I just bought my first time doing a rebuild just waiting for a new cam to come in now and finish it up
Your welcome. Congrats on your first rebuild!
@@UpAllNight91 I bought a new cylinder head and installed it and put in my old cams to test my compression and the intake left a small mark that I can feel with my finger nail it’s really small but will that ruin my new cams going in? I was being dumb putting old ones in to test it not thinking
@@UpAllNight91 I scratched my new cylinder by hand turning one of my old cams on it will it damage my new cams it’s one scratch I can feel with my nail just don’t Wanna ruin anything I have brand new everything
@@spongebobsi2iispongebobsi298 Can you email me some pics of what you have going on, email to upallnight91@hotmail.com That why I can see whats happening
@@UpAllNight91 ok I sent the email hopefully it’s good
i love this rebuild most people only do 1 minute worth of rebuilding but your one is so good and i love the high pitch that the thing that you are using
makes
Thank! I try to put these together so people can follow it step by step and get through the job.
Learning a lot from the channel man, thank you!
Thanks! Glad to hear its helping!
I like how the new parts are all oem. Even if it’s more expensive, it’s always better to pay a little extra! I did the same with my yz250
Yeah, hard to beat OEM parts for sure
This is the best rebuild video Ive ever seen and is by far the most underrated video on CZcams. Ive learnt more in this one video than I have in my whole schooling career (I graduated too lol). Awesome work man much respect to you.
Ahh thanks man! I appreciate it and appreciate you watching! ;)
Awesome video bro. Ill be using this to help me do my 18 yz250f. First time tearing it down and its pretty nerve racking but between this video and the manual, im hopeful i wont screw it up too bad!
Right on. If any questions come up let me know!
Thanks a lot for your help. Did my first ever bottom end with this on a 2020 yz250f. Some differences with washers but overall much the same.
Yes sir. About the same! Nice work!
I just watched this 2 hour video and it’s the best and most informational video yet. Thank you!! Just saved me like 4 grand
Awesome! ;)
Thank-you so much bro, your a great mechanic
Your welcome and thank you sir!
Good stuff. My 2021 WR450F is sitting in the shop seized. It started seizing up out of nowhere. The shop is telling me Yamaha believes it's the starter clutch. The verdict is still out. At least now I know what it takes if it did spin a rod bearing which it shouldn't have. I maintained my bike by the book. If I didn't live in a apartment and had a work area me thinks your video would have allowed me to do the job. Your tip on spitting the cases is gold. I was also wondering how the counterbalance aligned with the crank. Surprised you missed it.
Thanks for the video!!!
LoL. Yeah I, good thing I caught that or that thing would have vibrated like crazy lol. Hopefully they get your bike back up and running quick and well
@@UpAllNight91 none of Yamaha's suggestions have helped. The mechanic says the crank is spinning freely. I'll keep you posted when they open it up.
@@raulx.garcia9387 ok. Yeah once opened it should be obvious
It spun a rod. Yamaha doesn't want to back it up and the shop is quoting me $3900 including the starter and starter clutch it didn't need. What do you think? I'm in Colorado. Thanks!!!
Great Video. Thank you!
Your welcome, thanks for watching!
Great vid , I’ll be revisiting this when I have to split the cases , cheers
Sweet I be up all night building engines and all my YZ450f have 91 number plates. Subscribed for sure
Thanks man!
@@UpAllNight91 you’re welcome man!! I’ll be uploading some videos here soon. I just finished a build on my 2017 Yz450f. 99mm big bore(468), hot rods crank with a Carrillo rod, Hot Cams Stage 2. Dynojet Power Commander 6. With a ton of other odds and ins to help keep it cool and make it last
@@FleXyz450 nice man!!!
I love your videos. You make it look easy. Good stuff man.
Thanks!
“Oil drain bolt vibrated loose.”That’s a good one, I’ll have to remember that.
Yeah. He stripped out his drain bolt on his previous bike so on this bike he was putting it but not torquing it down good enough, so it vibrated out.
Must have forgotten the crush washer
@@user-if3ww8tm4yFor sure could be the case.
Thank you for being so detailed! helped me rebuild my first top end!
Thats too cool! Glad it helped and thanks for watching! Good job!
Bro this is the best video ever
Thanks man! And thanks for watching too!
Great vid bud.. thank you!
Thanks! Appreciate you watching!
Absolutely epic video, thank you for your time and absolute quality. One thing, I always thought the mating surfaces were pronounced like mayting instead of matting. It’s driving me crazy now, which is it??
Thanks! And oh man I dont even really know. I say it one way and I'm corrected so I say it the other way and the same. I too want to know lol.
Fantastic job!
Thanks!
I'm going to re-tighten all my drain bolts right now
LoL. Dont strip them out though
or you can look at the nut to see if it has vee notches cut into all the shoulders of the nut if it does it's left hand thread !
Ahh. I did not know that! Thanks for that info😊
I know you can but will you consider putting together a complete list of tools needed to remove and rebuild a motorcycle motor. Tools to remove the motor from the frame motor stand and tools for rebuilding motor everything.
If not I'll just have to watch all your videos, most of them already.
I like your videos.
Hello. Most the tools needed are basic hand tools. Tools are never a waste of money and can be around for life. The only "special " tools needed for a basic rebuild on a MX bike is a flywheel puller and a torque wrench. As you will see in my videos not even case splitters are needed. Just collect up on a good assortment of hand tools, sockets. Wrenches, Allen head tools and run out and buy as you find you need. They last a lifetime
Im extremely OCD now im going to be checking my drain bolt all the time ! Lol
LoL. I wont lie it made me rethink the drain plug again for a while too. Just be careful, dont want to strip them out.
@@UpAllNight91 definitely! Do you know the torque spec for it by chance on a 250f
@@aaronhinojos1131 Not off hand. I usually just go by feel. But if you are interested in downloading your manual for free here is a link, you can get all the torque specs right there.... library.ymcapps.net/library/om/app/index.html?baseCode=6150&langId=02
Doing the 2018 wr450 engine compared to my old crfx with head studs screwed into the engine, placing this cylinder is a nightmare
Yeah, gotta be more careful for sure.
Another excellent video. Ill be using it when I rebuild the bottom end on my bike. I do have a qurstion. What is your opinion on the quality of OEM cranks for the 2020-22 YZ450? Mine is at around 67 hours with no issues, but I have read a lot of people having problems with the OEM rods snapping. Have you seen this happen or helped someone deal with it? Im trying to decide if I want to just get my current crank rebuilt with an aftermarket rod, or just buy another OEM assembly.
Thanks again for all of your awesome videos. I learn something new everytime I watch one.
Thanks! I personally have not seen a problem with the 2020 to 2022 YZ450 cranks or rods. The YZ450s in them years that I work on have been pretty solid. I do suggest replacing the crankshaft with the rod every 200 hours on a track bike but at 67 hours you should be good to go. And when its time to replace it I would suggest OEM for sure.
@UpAllNight91 that's what I figured. I'm pretty meticulous on maintenance and so far it's been completely solid. I did do a top end at 50 hours (which turned out to be completely unnecessary) and everything in the bottom looked good...nothing had any play whatsoever.
Thanks!
@@grego67 Yes sir!
Great video!
Thanks!
amazing detail great job man! Does this carry over to wr450
Thanks. Yes the wr450 is pretty much the same motor.
Great video
Thanks man!
You just made it look easy hahahah
LoL. 😊
@@UpAllNight91 standing over the top like the video i got it straight away , I had been trying side on
@@Dalebrah69 lol. Nice!👌
Hi, I enjoyed the rebuild... I know of a 2006 yz450f that has a locked avail. for $800 Is that a good price knowing it will need a new crank and bearings and possibly a new cylinder and piston? I think I can follow your guide and duo the job myself. Is $800 A very good deal or is there a price you feel I should offer if everything else on the bike is in great shape? Please give me advice. Thanks Kenny in Mississippi....
The engine is locked up/seized.
Hello. if its in good shape its worth $800 just for its parts. For a fixer it depends. Sometimes what sounds like just a new piston and crank can work its way up to a cylinder head, valves, and cases included. Sometimes it can get expensive fast, so you have to be ready for that. You will also probably have to get the carb straightened since its probably been sitting around. It can be a project but if you have the time and willing to put the money into it, its achievable.
I noticed when you joined the case there was no spring with we ball bearing in the hole on the end of the gear selector drum does this model not have this or did you forget it? My 2018 450fx has one apart from that awesome vid mate
Hello. If you are talking about the contacts for the gear sensor, I usually install them in the drum after the cases are back together and then put the gear sensor in on top of it.
@@UpAllNight91 ohk that makes sence just doing my first full rebuild on my bike been this vid has helped heaps cheers mate
@@logan20v Yes sir! Best of luck!
What’s up man, I got a 2018 yz450f, I was riding and it started pinging, not knocking, for a while. Was so far from the truck had to ride it all the way home. Long story short, the bike won’t turn over, it feels seized but the starter has just enough to turn the motor over very slowly, it won’t roll in 5th gear. I did a top end rebuild, cylinder was fine, adjusted valves, new exhaust cam and chain. Still almost feels seized, but the it’s not. What could it be? Oil pump failure? Seized crank case bearing? I watched all you videos on rebuilding, did them step by step. I’m stumped here. Would love some help.
I would have spun the crank while the top end was apart to feel things but we are past that now. Hmm. I'm going to get you have a lower rod bearing going out and causing drag. Its the most common I find when things like this come up. I would start by pulling the top end off again and checking the lower rod bearing real well. Holding the timing chain up and spinning the motor, checking for drag and how she feels. You may end up having to go into the bottom end but I would start by pulling the top end and checking there first
Hi, i'm not a professional rider and i'm buying a 2021 yz450f with new timing chain and piston, literally 0 hours.
I would like to know if i have to be worried about maintenance, such as piston replacement, timing chain replacement, cranckshaft replacement ecc. ecc.
I'm gonna be using it on the streets and i'm not gonna squeeze the engine like on a dedicated dirt bike track.
what do you think?
of course i would make the ordinary maintenance like oil and oil filter when needed.
Hello. Even if riden like a street bike they will still have tighter service intervals than a normal street bike. They only hold about 900cc's of motor oil and oil will need to be replaced about every 3 to 4 hours of run time. They dont have a cooling can like a normal street bike so the bike would need to be shut off if sitting at a red light in the summer months. A aftermarket fan can be added to fix this issue though. But overall maintenance will be higher than a normal street bike because it is designed to make a lot of power in a small package carrying as little weight as possible.
whats a gear jammer cost? 10 bucks? got one on my key chain
Very nice work! Love to watch you work on it... But i wanna ask when do you need to resurface the cylinder head? (cam tower) i thought this needs to be done every top or bottom end.
Thanks! Appreciate you watching!. The cam journals? They should stay as good as new as long as oil changes are kept up and she never starves for oil. Is that what you where asking about?
The oil drain plug wasn't installed to the proper specs. They don't just "vibrate out".
They can vibrate out if not torque down enough. I didn't do the oil change that caused this to happen, it was the owner. His previous bike he stripped the oil drain bolt and was scared to strip this one so he under tightened it. As for me I don't use a torque wrench on drain bolts. I go by feel but I been doing this my whole life and have good mechanical intuition. I don't strip them and also don't have them come loose either.
Hey mate im just doing a rebuild on my 2018 yz450fx when i put the cases together it went onto the crank easy for a start then got tight i had to give it a few love taps to get it all the way on which put some side load on the main bearing the crank spun but was tight i got rid of the presure by taping inner side of main bearing and crank spins fine the main question i have is do you think this would of done any damage to main bearing ?? Cheers
Hello. That does happen sometimes and no worries. It wont hurt anything tapping it to free it up. Thats what I do when I need to. It happens and everything will be ok.
Love your videos 👌🏻
I have the same bike 2020 but it’s kind of hard to bump start
It like it has triple the normal compresión
But I don’t know if it’s just the piston and cylinder is grinding
How much do you charge for a change of cylinder and piston ???
Hello Shoot me an email at upallnight91@hotmail.com
anyway you could help me with the valve adjustment im on my last rebuild step but i put a .40mm and it pushes the valve down so i dont know how to measure it its ok if you cant explain it to me because if not the auto shop said they could do it for me thursday
Hello. If you check the video in the link below I have a video that should walk you through it pretty well. Its for a YZ250f but its the same steps as the YZ450f. Let me know if you have any questions. Here is the link czcams.com/video/H56q2JmbJbw/video.html
Hey man. I pulled the motor on my 450 and opened it up and this little push rod type thing with a spring attached fell out. I have no idea where it came from, any ideas?
I'm thinking your talking about the gear sensor contacts, they go in the shift drum to make contact with the points on the senser thats on the case
Why not replace the oil pump? It was ran dry of oil also
I maybe would have if it was mine but the owner wanted this repaired at the cheapest possible. That being said he's probably put 100 hours on it since then and alls been well
How close is this to a 2010? My crank case is cracked and I wanna use this vid as reference.
Should be very similar.
Awesome video, i just picked up a 2010 yz450f with a damaged crank, i have a full rebuild kit on order . This engine looks slightly different to mine? ( just where the oil sight glass is ) if i follow this video step by step think ill be ok. Thanks
Scott
Yes sir! Will surely help. Here is a link to where you can download your bikes manual for free from yamaha so you can get the head torque specs and you will be golden ( I think 2010 uses slightly different torque specs than the 2021)
www.yamahamotorsports.com/yamaha-manuals
Do you have a transmission rebuild video? For a 2021 Yamaha yz450f
Unfortunately I dont. I'm sure one will come soon enough but I do have a YZ450f engine rebuild video that can walk you though getting the motor apart and back together. And then I have a YZ250 video where I repair the transmission. If you put the two together I'm sure it will get you through the job.... I will grab the links for ya....
YZ450f rebuild video ... czcams.com/video/aFV0zTRmMGc/video.html
YZ250 trans two videos here... czcams.com/users/results?search_query=1%3A11+yz250+day+2 ... and this one too..... czcams.com/video/Bf3-Xet0y7A/video.html
How did you know your counter balancer wasn’t synced right after you finished the bike sorry I’m rebuilding mine and I just wanna make sure I know
I went back through my memory and didnt remember timing it in so I got back into the motor. If you didnt line up them dots on the two gears I would open it back up and do it. It only takes a half hour if you stay on it.
@@UpAllNight91 what would happen if you left it untimed
@@spongebobsi2iispongebobsi298 It will vibrate a lot more than normal.
Do you take new customers and if so what is the best way to get in touch with you?
Hello. Yes I do. you can reach me at upallnight91@hotmail.com for my phone number.
Have you ever had a oil pump burn out on the new yz250f. I do a lot of wheelies and i was told that it could of burnt out because of them
I havent seen that yet on the newer yz250f but a few years back I use to do a lot of motor rebuilds for the bike life guys around here. They wheelie the bikes for miles lol. I would find worn oil pumps, and the motor showed signs of oil starvation. Often times the lower rod bearing would go out due to oil starvation and cam journal wear. When these 4 stroke bikes are wheelied for a long time all the motor oil goes to the back of the motor and the oil pick up screen is unable to pick up oil. On some of the bikes that kept breaking down due to this I suggested running higher oil level than recommended by manufacturer and that seemed to help greatly.
@@UpAllNight91 that makes sense ima do that once she’s rubuilt thanks man
@@150xcw yes 👍 sir
Hey, I just rebuild my 2016 yz450f but my oil is milky. It isn’t milky in the radiator. New water pump seals and head gaskets. I even put a lil swipe of grey gasket maker on the head gaskets. At first I did start the bike with out coolant, do you think I damage the new water pump seals? What you think the problem might be?
Hello. I wouldnt have put any gasket sealer on the head gasket itself. That stuff usually causes a leak. Since its getting in the oil but no oil in rad, its likely a water pump seal or head gasket allowing coolant to seep into the oil.
@@UpAllNight91 I had changed both, I just took it back down to inspect, retorque and everything looks good. Ill probably have to check the water pump seal. The bike does run really good and easy starting
@@Jason-zr6il right on. Could totally be water pump seal
HOW MUCH HOURS IS RECOMEND TO CHANGE THE ROD IN A 450 ??.. THANKS
For a track bike, a crankshaft should be replaced every 200 hours.
THANKS
@@lisandrodebortoli5158 Yes sir!
Did you put in the oil drain bolt?
Not before the job when it backed out. But after the job I did, and safety wired it in
Can u do a 22 yz 250f full motor rebuild
As soon as I have one to rebuild I surely will. Anytime anything good comes my way I try to record it
Oh oh ok perfect btw is there any motors that are welded together so you can’t rebuild them or does every motor come apart
All motors that are of quality are designed to also aid the mechanic in repairs
@@UpAllNight91 oh ok is there any motors u have to grind into like grind into the cases or are they all bolted
@@sethmac951 only thing I know of thats welded is toyota trucks rear differentials lol
NO video at that link
Oh sorry. U are correct. I will correct that when I get bacl home later. Thanks for letting me know
Hey man so i just pulled my 06 450f motor and the piston looks mint but the crank has blue marks at the rod bearing so they got hot. Its a wiseco top and bottom. Should i buy a bottom end?
Usually the bluing on the crank was from them heating it during the assembly. As long as the rod and rod bearing feel good. Shes good.
@@UpAllNight91 awesome had me worried. Thanks for your time 👍
@@jamesclark4 yes sir! 👍
Hey I’m doing my bottom end rebuild right now for my 2021 yz250f. It has brass metal shavings in the oil filter. I have it all stripped down now. Do you think I should replace the crank bearings and all the seals or no?
I would change the main crank bearings with the crank just to be safe just because it did have shaving in the filter. Just to be safe.
@@UpAllNight91 okay thank you man, keep up the great content, you are like the only person I have seen working on the newer bikes!
@@KaiMiller thanks man. And yes sir I will be keeping them coming . Thanks for watching and also commenting!
@KaiMiller i am about to do the same thing on my 2019 yz 250f…have brass shavings in oil filter as well….did you have any damage to the head and cylinder?
@@reeceblanchard9132 thankfully I didn’t, I didn’t even have to hone the cylinder. But your bike could be different but hopefully you don’t have any damage
Where do u get yamaha parts just call a dealer? Or is there a site i can just order from
Hello. I order them online. Here is a link to a video I put together on ordering OEM and after market parts, hope that helps. czcams.com/video/slOfGOMQshs/video.html
@UpAllNight91 awesome just got a full carb rebuild kit and a mid body seal kit.
We will see what the engine needs when i get my fly wheel puller
@@jamesclark4right on!
Some really good tips in this video....keep up the good work....@stanforadventure
Thanks! I will do my best. Appreciate it!
Hey, what’s the valve specs for a 2016 yz450f?
Hello. The specs are...
Valve clearance (cold)
Intake
0.13-0.20 mm (0.0051-0.0079 in)
Exhaust
0.18-0.25 mm (0.0071-0.0098 in)
Here is a link to where you can also download the manual from Yamaha for free
library.ymcapps.net/library/om/app/index.html?baseCode=6150&langId=02
@@UpAllNight91 thanks for the manual
Why did you leave the piston in the crank ???
Been a while since i made the video but if the crank was bad I probably left all that together because it would receive a new crank and piston on assembly
@@UpAllNight91 ohh ok
what year is this bike
2021
Dude what the hell are you doing!!!! Replace the timing chain it's all kinked up plus it ran dry , why did you skip motor bearings what the heck man ! You never skip bearings and timing chain on a motor
On a typical rebuild yes, bearings and chain. However this chain felt good as new (no kinks or stretch) and so did the crank bearings. Bike hardly had 50 hours on it. The owner just wanted the bare minimum to get her good again. I'm pretty confident as long as the drain plug stays put she will be good for many hours, as shes already put on another 20 and so far so good
Fantastic video. Great detail. BUT the rule of thumb I was always taught never ever go that deep and not replace the big end bearings,my only gripe man lots of work to not replace the cheapest but most important bearings . And over looking the the timing dots on the harmonic balancer woooooo just lucky not the timing side . Other than that👍
great video, do you have instagram? I have a few questions for you. Thank you
Hello I don't have Instagram but you can email me at upallnight91@hotmail.com