Absolutely amazing video. I am a 15-year-old up and coming dirtbike mechanic I have never done a bottom end before and this video made it so I could thank you so much. Keep making great videos.
@UpAllNight91
Ай бұрын
Thats awesome! Glad to hear. Thanks for watching!
@tndeere
5 ай бұрын
Great Job!! At 57 been a. life long rider/shade tree mechanic.Never woked on anything newer than 06 YZ250f .Your a wealth of knowledge and a great mechanic.Thanks for sharing
@UpAllNight91
5 ай бұрын
Thanks tndeere! A 2006 YZ250f is really not much different than a 2023, they turned the top end around but otherwise about the same idea from a mechanical perspective. Well they also went to fuel injection and electric start too which brings some electronics into the mix. Thanks for watching and thanks for the comment. Hope your having a great weekend!
@jmx7656
6 ай бұрын
Great explanation and views and angles of your video. Always love watching them. Thank you for always posting.
@UpAllNight91
6 ай бұрын
Thanks Brother! Should have her up and running today!
@dougw585
6 ай бұрын
He makes it look so easy!
@jonathangoudy7094
5 ай бұрын
Must have been a lot of work, I appreciate the videos. You talk like a guy I work with, Rob, very cool guy.
@UpAllNight91
5 ай бұрын
Thanks! Surely was a lot of work but not as bad as the KTM 450 I just did the transmission on. 4 stroke of course makes it more complicated. Well at least Rob is cool 😉
@huertix4393
2 ай бұрын
From Spain!!! Thanks a lot. you really rock bro!!! :)
@UpAllNight91
2 ай бұрын
Thank you! Hello Spain!!!
@jshab001
6 ай бұрын
I don’t comment a lot on KZitem but I had this exact thing happen on my 2015 YZ250F. I am in the process of getting the head machined and rebuilding the bike. Your videos are incredibly detailed and helpful. Praying the connecting rod isn’t bent. Thank you and keep it up.
@UpAllNight91
6 ай бұрын
Ahh thanks and thanks for commenting. Do you know how may hours where on your bike when it dropped the valve? And yeah I hope your rod is not bent. I would check it real well.
@jshab001
6 ай бұрын
@@UpAllNight91 I don’t! Believe many more than I was led to believe. FB Marketplace purchase and it had clearly been torn into even though the seller said it had not. Steel valves with stock springs, springs upside down. May replace the bottom end just to be on the safe side and have a known good quantity moving forward. Would hate to put all this money into a brand new top end and destroy it because I wanted to save $500.
@UpAllNight91
6 ай бұрын
@@jshab001Oh man,, steal valves and stock springs, surely to have a problem. Springs up side down even worse! I agree change the bottom end if you can. I would if it was mine, no question about it. One of the best things you can do if you plan to own this bike is buy a GYTR tuner for it. You can tune it with maps but even better is you can diagnose trouble codes and see live data. You can also check the hours. Even though it gives you the option to reset the hours, hardly anyone ever does which is good when you wanna know the hours.
@jshab001
5 ай бұрын
Any tips on removing the chain tensioner bolt. Doesn’t want to budge and it’s stripping out.
@UpAllNight91
5 ай бұрын
@@jshab001eww bummer, did you get it out yet? Is the motor in the bike or out?
@timbates5320
6 ай бұрын
Really like your channel,I’m so glad I subscribed love the engine builds,and I’ve learned a few things keep up the awesome work
@UpAllNight91
6 ай бұрын
Thanks! I'm happy to hear your enjoying the engine builds. Thanks for coming along!
@cannonmead2766
6 ай бұрын
I’d like to advocate for using the heat , freeze, tap. Method on those bearings. I just restored an 02 yz250 and the previous owner clearly used a press to install the bearings. There had been so much force on the stator side case. It cracked the case. Much safer using sockets and deadblows. Especially using heat on the cases and freezing the bearings. It was already a money put but man it adds to costs to replace cases!
@UpAllNight91
6 ай бұрын
I feel ya there. When I first started this channel I had a few comment when I would put the bearings in. Thats not the correct tool, and glad thats not my motor, or glad I'm not buying your bike. At first it bothered me but later I asked myself "hmm wonder how many motors these guys have done?" and then I let it go. Told myself I just need to stay honest and show how I do it, do my best to get others through the job with success. I have done probably over 1000 motors in my years and I have found this to be the safest way to do it.
@BesharMohamed
6 ай бұрын
Enjoying your videos from Sweden. Learn a lot from you and inspiring me to do more motor works on my bikes ❤
@UpAllNight91
6 ай бұрын
Hello Beshar Mohamed from Sweden! Thanks, I enjoy hearing that and its surely my motivation. Appreciate ya!
@damnbikerw5043
6 ай бұрын
Best channel going for learning the how to/tips/tricks of wrenching on bikes. Please keep up the great content.
@UpAllNight91
6 ай бұрын
Thanks brother. I surely plan on it!
@jkilco1
6 ай бұрын
So grateful for your content brother. Your channel has been incredibly helpful for me as a newbie. Thank you man!!!
@UpAllNight91
6 ай бұрын
Your welcome! I'm thankful for you too! Making these videos has been a pleasure, its a very rewarding extension of what I do for a living. Hard to explain but it feels good lol
@jkilco1
6 ай бұрын
@UpAllNight91 you got a great thing going, keep it up bro!!!
@UpAllNight91
6 ай бұрын
@@jkilco1 Thanks Brother! I plan to as long as the good Lord allows me too. Hope your having a great weekend!
@ufrozoo
Ай бұрын
Thanks!
@UpAllNight91
Ай бұрын
Thank you!!!
@mikekraz6193
5 ай бұрын
thank you nice work!
@UpAllNight91
5 ай бұрын
Thanks!👍
@lawrencecorbo6586
6 ай бұрын
Easier said than done ✅ but this man do both well
@dougw585
6 ай бұрын
Get him Beavis!
@UpAllNight91
6 ай бұрын
hahahah! Oh hes gotten me before, and good too! Left holes in my ankles LoL
@joelatkinson2080
6 ай бұрын
Yeah, make a video about the bad crank. That would be interesting to see.
@UpAllNight91
6 ай бұрын
Thanks for reminding me about that! I'm sure Ross and Joey will let me keep it so I can test it and post a video of it.
@UpAllNight91
6 ай бұрын
BTW, Uploading part 4 as we speak. Shes up and running well!
@joelatkinson2080
6 ай бұрын
Thanks for calling out Loctite brand for working to close off-road riding areas!!!
@UpAllNight91
6 ай бұрын
Yes Sir! Glad I was informed of this. Will be looking into other brands from this day on.
@ChipMitchell-fs6ni
6 ай бұрын
ThreeBond who also brands under the "HondaBond/Yamabond" names is the way to go. Used by all the Japanese OEM's. @@UpAllNight91
@hughiemaceachern5282
19 күн бұрын
No more 3 intake valve
@UpAllNight91
17 күн бұрын
Yeah, they went from 3 intake valves to only 2 intake valves.
@DeadRedMoto
4 ай бұрын
I was chasing myself in circles thinking I lost a bolt and bracket of some sort until I finally found this video. Do you know why the left side timing chain guide has a bolt hole drill but in fact no bolt?? The right side guide has a bracket and counter sunk bolt but the left side has a “bolt hole” with in fact no bolt (come to find out lol) 🤣
@UpAllNight91
4 ай бұрын
Hello. I'm not sure why. But maybe its also used in other models where they do bolt them down?
@JW23551
5 ай бұрын
Replace the Loctite with Stuck Nutz!
@UpAllNight91
5 ай бұрын
Yes Sir! My first order of Stuck Nutz just arrived and I'm looking forward to using it from here out
@JW23551
5 ай бұрын
@@UpAllNight91 Awesome!
@larrywarner9314
6 ай бұрын
I'll be honest with you there's nothing wrong with that cylinder, and that head is repairable
@UpAllNight91
6 ай бұрын
Hello. If you check back to video 1 of this build there is a pretty deep cut in the nickel plating on that cylinder. Thats why we are replacing it. The head could be rebuilt but it would have to be a really good machinist. Yamaha does not sell valve seats for theese bikes, only the head. So it would also have to be a aftermarket valve seat. I have had this type of work done in the past for customers and the head work is so so at best, often needing to be sent back in to get a better valve seal and even then once I was told "it might leak a little water when you test it but it will be fine". Sometimes they dont seal that great without extensive lapping, and then there is the risk of the seat not staying in place down the road. Its just too risky on a race bike going for big jumps in my opinion. a OEM head is cut so perfect, no lapping is needed, no nothing. Just install a good clean valve and it seals right from the start. And I have never seen a OEM heads valve seat come loose.
@bradley7723
6 ай бұрын
Only a pro can make what they do look so easy. Question that is off topic, but what breed of rooster is that? He sure has got a good set of lungs on him. 🙂🏜👍
@UpAllNight91
6 ай бұрын
Thanks! Hes a Polish rooster. Was was to be a hen but at a young age he started roosten and then we knew lol
@hughiemaceachern5282
19 күн бұрын
What u did won't hurt nothing
@larrywarner9314
6 ай бұрын
I have a friend that raced for Yamaha for few years and now he's one of there engine builders and you would definitely know if you had a race set up on that bike , cylinders are highly modified, and they use cams that aren't made by Yamaha
@keithalexander36
6 ай бұрын
Not always on practice bikes or even back up bikes. I have bought tons of ex race bikes.
@keithalexander36
6 ай бұрын
Plus I know the team and owner personally not going to put it on blast but they all do it. Often but not always when a race team retires a bike for sale they put back on all the stock items so they can keep their custom stuff.
@UpAllNight91
6 ай бұрын
@@keithalexander36 Thats right Keith. Thats what I'm thinking happen here. Stock or OEM parts from maybe even another bike that had more hours on it where put back on it just to sell the bike. And they retained or saved the high dollar modified head, cams, and stuff for the new race bike they have in line.
@DQ144
2 ай бұрын
Water pump. Where is the water pump installed. Thank you
@UpAllNight91
2 ай бұрын
I didnt open up the water pump, I only removed the clutch cover with everything still on it.
@jadereynolds6963
3 ай бұрын
@upallnight thank you for this amazing series of videos, this has helped me strip down and rebuild our 2022 yz250f with very detailed instructions and explanations, legendary. I have recently got the bike back together all good, made sure valves are within tolerances, now when the bike is running i rev and when the revs on the way down it pops and backfires from exhaust. I thought this would have bene a timing issue, but the timing is spot on. where else woudl you start looking? Ive read something about the "washer" between exhaust and engine, and also about the idle could be too high, what are your thoughts on this?
@UpAllNight91
3 ай бұрын
Hello. Goob job on the rebuild! Yes having the idle too high can cause popping on decel. I have seen it myself. Also if the exhaust header gasket between the exhaust header and exhaust port is leaking that can also cause it. I surely would check them to things. I wont had a girl at the track bring me her YZ250f because it was popping on decel and the issue was the idle was cranked up way to high. I lowered it and it fixed it right up.
@jadereynolds6963
3 ай бұрын
@@UpAllNight91 it was the exhaust not sealing properly against the engine. It hadn't sat quite right when I put it on first time. All good now. Thanks for the advice and keep up the awesome videos
@UpAllNight91
3 ай бұрын
@@jadereynolds6963 Right on, thats good news you got it fixed up!
@Dylan.lawrence
4 ай бұрын
how many hours would you go on a 2023 yz250f crank
@UpAllNight91
4 ай бұрын
Hello. 200 hours if its a track bike. As long as its checking out well while doing top ends, 200 hours is good for a track bike. For a play bike or trail bike its probably ok to run it much longer than that if its not abused or riden too hard.
@bobileksen3496
6 ай бұрын
hey man im about to do a rebuild on my yz250f 2017 and i need to buy a flywheel remover tool but i don't know the diameter/thread size i thr help to that question would really help me dude
@UpAllNight91
6 ай бұрын
Hello. That bike takes a 24mm x 1.5mm thread puller for the flywheel.
@bobileksen3496
6 ай бұрын
@@UpAllNight91 lots of thanks! much appreciated man
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