1:11

(4 parts video, be sure to catch all 4 parts) Replacing a crankshaft and piston on a 2008 YFZ450R. Should be about the same in 2006, 2007, 2008, and 2009 to 2013. Enjoy
(correction) At 3 minute mark they are 14mm head bolts, not 17mm
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Thanks for watching!
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[@11GalleryATV]

Don't sea too many people using air impacts anymore ... love that sound!

[@UpAllNight91]

Thanks, guess that's old school anymore lol

[@ibesailing]

Yo man! Thx for the instructional videos…helped me a TON on my first small motor rebuild. Mine was a similar deal but had steel shrapnel. So did a little more cleaning, replaced oil pump, a few bearings & honed cylinder. Not being “self calibrated” haha, I torqued everything to spec and she fired right up after assembly….awww yea! Just did my break in ride and she pulls hard and smooth. Thx my dude 🤙

[@UpAllNight91]

That's bad ass man!!! Congrats!

[@flipcoin3852]

​@@UpAllNight91 Thank you very much for this very detailed video. I'm wondering if you happen to know what locking washer goes on the main crank same side as counter balancer side. I've checked the manual to reference the part number but it doesn't even show that locking washer in the part diagram. I also contacted my local yamaha supplier and they can't find anything on it as well. If you happen to know it would be much appreciated 👍

[@UpAllNight91]

@@flipcoin3852 The lock washer for the main crank gear? Here is a link www.partzilla.com/product/yamaha/90215-21003-00?ref=a0a4f03d8f514004e1c64693122098698177a0c1

[@flipcoin3852]

​@@UpAllNight91 awesome thank you for replying. 2 yamaha dealers couldn't get me the numbers to that washer because I dosen't show up on the parts diagram. Much appreciated!

[@UpAllNight91]

@@flipcoin3852 Yes sir!

[@Fastlane112]

That rooster....lol Very informative, thanks man!

[@UpAllNight91]

LoL, thanks man!

[@sbz666_]

Listen, I was getting annoyed by that rooster crowing until you turned the camera and showed off his amazing hair. Mans just wants people to know how fucking good he looks.

[@UpAllNight91]

Hahaha! My wife loved this comment!

[@SkillinTime]

Thanks for the video man was a lot of help 👍

[@UpAllNight91]

Yes Sir! Thanks for watching!

[@joelatkinson2080]

Another great video!!!

[@UpAllNight91]

Thanks!!!

[@Donny20909]

On min 21:40 wen u say the oil pump feels good, i think mines got metal shaving in it, because it barely spins, alot of restriction, wat u think

[@UpAllNight91]

I would pull the oil pump out and open it, check it out. But most likely it might be just a good idea to replace it to be sure. It is the heart of the motor.

[@stevenlopez2805]

great vid bud!!! is there any site/link where i can purchase the full kit you did? i plan on rebuilding everything just as u did! thnx in advance!

[@UpAllNight91]

Thanks for watching! I usually get most my parts from rockeymountainavt, I also use motosport, partzilla, and can't forget ebay even. They do sell complete kits like hot rods and wiseco. But you can also pick through the oem parts section on these sites and use OEM parts as well. With OEM stuff its usually not in a kit so you gotta pretty much plug it all together

[@Tylerk1947]

Hey man great video! What flywheel puller did u use? Like what brand?

[@UpAllNight91]

Its pretty worn today and doesnt have what brand it is on it but if I remember correctly it was a motion pro puller

[@congwang2609]

if you use car puller with the bolts，it‘s pulling the gear out which there is pin there can it really happen？

[@UpAllNight91]

I'm sorry. I don't understand the question?

[@chongxgaming882]

You sure it’s an 08? 04-06 didn’t have the oil nozzle they made it in the 07 and up. I have an 06 I’m doing the oil upgrade/update whatever you wanna call it where you put that in yourself but you have to mill or drill the case and change out the oil pump

[@UpAllNight91]

He told me it was a 2008 but it surely looks to be a 2007. I always heard of people doing that mod to the yfz450. I would surely want oil shooting up at the piston

[@leehuntley189]

I saw this comment right off the bat and yes do the mod unless you really love spending thousands on parts

[@tylervickers1361]

It’s a 04-06 it was never there. The ones with oil squirter aren’t flush where the oil squirter goes they are milled down

[@tylervickers1361]

That being said. Your bike could be an 08 you can look at the swingarm for easy sign and also voltage regulator thing on center of frame in the front isn’t on the older models either, but that engine at least the clutch side cover is 04-06

[@UpAllNight91]

That motor was for a friend and he already sold it. But I surely have learned something new on these. That squirter through me a curve ball lol

[@tylervickers1361]

@@UpAllNight91 it’s always good to learn things haha, but yeah you’ll notice on the clutch cover they are cut out right there with the oil squirter

[@UpAllNight91]

Yes, I now know how to spot it out. 😄

[@drechristinahoward7373]

Do you know where to send a crankshaft yfz450. To have it's rod replaced and balanced trued

[@UpAllNight91]

I dont know anywhere first hand. As I usually just replace the crankshaft. But if I get a old enough bike that needs it day I might have to figure that out.. Maybe ask around thumpertalk forums?

[@willygerzen8722]

I have a question there where a bit of shavings in my oil filter so I disassembled the top end and saw that my crank is stiff so I will replace that and I was wondering if I should replace my oil pump too it’s a 2007 yfz450 and it has that oil squirt thing

[@UpAllNight91]

Hello. I would suggest at least pulling the oil pump out and checking it. If it shows signs of wear or if you find metal in the pump then yes replace it. But if it looks clean and shows no wear then it can be re used.

[@willygerzen8722]

@@UpAllNight91 ok thanks

[@danielcortes3478]

Hello can u tell me where I can Oder case and things I need to fix my motor thank u for your video

[@UpAllNight91]

For used parts when needed i like to check ebay. For new parts www.rockymountainatvmc.com is good as well as motosport.com and also partzilla.com for OEM parts

[@MurrayMotocross1]

How many bolts have you stripped hitting it with the air impact?

[@UpAllNight91]

Maybe 2 or 3 in my early years. I believe every good mechanic needs to strip a few to learn lol. These days I can't even remember the last one I stripped. Its surely been a while

[@wvsportsman304]

How would one get ahold of you to possibly send or bring you a yfz motor for rebuild just like this one !! Like what state are you located in

[@UpAllNight91]

Hello. I'm in Florida, between Tampa and Sarasota. You can reach through email at [e-mail]

[@bennyreimer6132]

I just did a rebuild like this one. But when I was putting clutch cover back on I have one bolt left over and can't find where it goes. Can't see that I forgot one on the inside either. Any pointers

[@UpAllNight91]

Ohh bummer. Any pictures of the bolt? I might be able to tell by looking at it

[@bennyreimer6132]

@UpAllNight91 it's the same as the shorter bolt for the clutch cover just this ones shinier and the tiniest bit shorter

[@UpAllNight91]

@@bennyreimer6132 that sounds like the little 8mm that holds that metal oil tube down that goes from the right top rear of the motor to the left side. I would at least pull the clutch cover off and the clutch and look around.

[@bennyreimer6132]

@UpAllNight91 had it off 2 times already lol. Can't figure it out. I'll keep looking

[@UpAllNight91]

@@bennyreimer6132 bummer. Hopefully u find its location

[@getoutside8202]

At 17 minutes you pulled out a bushing and o ring out of the coolant port. Somehow i am missing mine. I have looked on partzilla and cant find a replacement. If there's any way you could help me find where to order or a part number for that item it be thrilled. Thanks in advance

[@UpAllNight91]

Hello. Yes its in the water pump area. Here are the links... www.partzilla.com/product/yamaha/5BE-12564-00-00?ref=0b34ddecf010e45273e734b12df15f9adc60de57 ................and................... www.partzilla.com/product/yamaha/93210-19758-00?ref=0b34ddecf010e45273e734b12df15f9adc60de57

[@getoutside8202]

@@UpAllNight91 i appreciate, after a good amount of time i did find it. I appreciate your efforts to help and your video

[@UpAllNight91]

@@getoutside8202 thanks man. Sorry it took so long, had to wait till I got in front of a PC

[@getoutside8202]

I definitely understand, i appreciate you just replying.

[@8300rpmallday]

the part you grab at 9:38 is the center gear supposed to free spin one way????

[@UpAllNight91]

Yes. That goes to the starter clutch, it's a one way clutch. Should only spin one way by finger and not the other

[@8300rpmallday]

@@UpAllNight91 okay thank you that what i need to know to replace the one on my brother

[@8300rpmallday]

@@UpAllNight91 would you have video of there gear to see it spin please

[@UpAllNight91]

During the reassembly in like the 2nd or 3rd video I cover how the main starter one way clutch spins only one way, right as I'm putting the stator flywheel back on

[@8300rpmallday]

@@UpAllNight91 ohh okay let me look up that video

[@Yfzerik07]

We’re are u located bro ?

[@UpAllNight91]

Hello I'm located in the Parrish Florida. Which is kinda between Tampa and Sarasota

[@amansrights]

Dude where you located i can you to rebuild mines

[@UpAllNight91]

I'm near Tampa Florida

[@stevenlopez2805]

great vid bud!!! is there any site/link where i can purchase the full kit you did? i plan on rebuilding everything just as u did! thnx in advance!

[@UpAllNight91]

I got the tank at a welding supply place. The gauges and regulator where purchased on ebay . Just search ebay for nitrogen shock regulator and the same set I have will be right on top for like 165 bucks.

[@jasonprzeadzki4375]

Where are you located are you doing Michigan I have a 2005 YFZ450 that needs rebuild but I would like to learn how to do it