Thank you for the video. I need to split the case on my ‘14, and clean the screens. Got some debris up top and grooved the journals in the head and cams. Unfortunate but I’d rather that than a motor. Your video gives me confidence.
Thats a bummer man but it could always be worse i also did a more recent tear down video and a new rebuild video as well its a 3 part series. I am working on another rebuild video now that will be one longer vid of the whole entire build.
Hello. I am trying to rebuild the engine of my yfz450 2004. when I was disassembling the housing a ball came out like a bearing and I don't know where it is from. will you have idea where it goes?
I just picked up my first ever yfz 450 04. I just got into riding a year ago.. but I've been hooked with blasters and raptor 80's lol( for my kids) but I've been building engines blasters and 80s anyway yesterday I picked up the 04 yfz450 and its not supposed to be working (I haven't tried cranking it. Since the guy says top end is bad) if oil upgrade is done what else should I be doing like I've read about stator not charging battery maybe upgrading crankshaft, bigger bore and piston? Cams or cam? I also have a friend with his 05 yfz450 that has been sitting for like 7-8 years but he wants to do big bore upgrade any recommendations maybe also a crankshaft bore set up cams and port & polish.. so since I did the engine rebuild on my 05 ram 1500 and other quads he has some faith in me and wants me to fix his.. any help would be great..but even since last year I've been watching these yfz 450r videos u a bad dude..and thanx for sharing them.
My builds i send the heads out for porting and cams and +1 valves. I run stock bore but high compression piston’s and a bored throttle body and fci intake keep in mind this is for the efi yfz450r the carbed models while you can do the same you would need to jet it for any of the above mods. I always do new oem cranks and all the bearings in the entire cases. I prefer high compression over big bore kits for racing.
I know im a little late but I was wondering if you reused the headbolts a couple times?! Or do you replace with new everytime you do a rebuild? Thanks!
Dear, can I ask you a question? it turns out that the second gear of my yfz450r is not good. I just disassembled and I realize that when I insert the gear the two pinions rotate on the axis.
@@ononewheel7 I have disassembled the whole engine because the second gear was not working. Once disassembled, I noticed that the sprockets of the second turn on the axis of both, is that wrong?
@@juliopachecoaravena8847 no worries man if you can send me a video threw instagram or facebook or email im ononewheel7 on instagram and my email is in the about me section
@@ononewheel7 dude, tysm! fr, best channel ever man. Thank you! taking apart a yfz450 engine for the first time, and u made it a whole lot easier. God bless you man!
Is the bottom end basically the same on the carb models other than the oil screens other than the oil pick up I’m currently in the process of making sure everything’s in place and all my dowel pins are in etc before I reassemble I’ve been using your videos as a reference
@@ononewheel7 yes I’ve been following both it’s my first time rebuilding a bottom end! Only thing I’ve had trouble with is the damn shift forks but I just removed the little pins and than got them in place like that
I run blud racing lubricants its really good oil and doesn’t break down fast like others ive used in the past! I have a oil change vid i did not too long ago have a look at it!
I have a 2008 Yamaha yfz 450 I bought from my buddy with a broken case right at the clutch shaft I put it all back together today and the clutch shaft is now harder to move and won’t go back on its own with the spring any idea?
@@ononewheel7 no I took thclutch rod out and set it in there right I’m doing a whole motor rebuild got to part 3 of your videos before I realized that you have a 2018 and not a 2008 but very similar
@@ononewheel7 i have to do the same job on that kfx450r i got. someone didnt run a case saver. chain came off and destroyed the case were the clutch rod goes into the case
Hey I need a little advice I just recently paid a guy to rebuild my motor since then I've had two leaks the first one was easy I replace the inner clutch gasket. Now I've got one right in the center of the case so I'm going to have to tear the whole motor down everyday it's getting worse. Can you help me out with what gaskets I need to replace on the way down to the bottom of the motor. I know I need a case splitter what about a flywheel puller? I'm putting together some stuff in my cart on Amazon like I said assembly Lube yamabond , copper gasket coating anyting else you can think of I greatly appreciate
It was a friend that rebuild it me and him got into it we're not friends anymore. Because the kit I ordered on eBay the gaskets was green even the guy that sold them to me told me they should be green the last time it was leaking I pulled it apart and replaced it and it was a red gasket so that makes me wonder what else out that $800 kit I bought did he not put in there I paid him good. I think he just use the old gaskets and put gasket maker in there. I'm new to this but I'm going to watch your videos and some others and I got a service manual
Respect John. As I can see you doing this just for a second time - hahahahha, no more! Just a quick question - as I see the video Engine is looking really good and clean inside. What is idea of tear it down? Do you heard some noice or anything that make you tear it, or just to be sure that everything inside is OK?
The head needs to be sent out for a service the quad wouldn’t start after that last woods o cross race i ran and i have a small crack on the cases which doesn’t affect them at all so I’m gna replace the cases and do a new crank,bearings and then a new piston,cylinder! This one should have lasted a little longer but after the mud at ironman it trashed the top end i had some get in the intake and sucked threw!
Hey john where do you get your cases? I broke mine around my shifter and need a new set who do you suggest my bikes an. 08 so I figured Yamaha wouldn’t carry it anymore, amazing video man
U deff know these motors. Thats for damn sure lol I just bought the 520. 5mm 98mm kit from bp racing. Going to get headwork done. U think stock cams, valve train with kibblewhite guides and seals be ok? If I went stage 2 later could I still use stock valve train? Thanks for any input man!!! Liking these yfz vids. I'm a banshee guy but I need a reliable quad. Reliable.....ish 🤣 🤣
Efi or carb? Usually eBay has some you could check there muffs motorsports or stone concepts are good stores to search and the yamaha groups on facebook as well I’m sure you could find one
@@ononewheel7 It's a fantastic video. I have a 2009 450R that might run for a few seconds, then stop, and when I try to fire it back up again, the engine won't even turn over... almost like the battery just lost all it's juice. I can't find anything loose electrically, so I'm thinking it's internal now. This video is a great motivater. Thanks.
@@ononewheel7 First thing I did was put a new, fully charged, battery on it. All dash lights come on... Not sure where I'd see an engine code flashing... if it's on the dash panel, I'm not seeing anything there. And I've checked all electrical connections, and all wires looking for splits and chafing, and can't see anything. Maybe I'm missing something. Interestingly though, I did have to replace the rear subframe after my kid took a tumble and bent the oem cast unit. It ran for a couple rides fine, then just died, and since then I've had this problem. So I had to re-run all the wiring back to the battery box etc. So I've paid particular attention to the wires there, but like I said, I can't see anything.
Tim Lawrence id double check all those wires The plug for the rear brake light is also the same plug as the crank sensor but the crank sensor is white and the brake light is black I’ve seen people mix those up b4 and he quad wont start? Also make sure that little ground pigtail is plugged into the negative main wire Also under the battery box there is a small sensor thats the tip sensor make sure that is plugged in as well! If its not it could cause the same thing to happen!
Just wondering how much/how hard would it be to swap the transmission in my 19 yfz450r. I have the motor all disconnected and pulled haven’t started tearing into the motor at all, quite nervous cause of how new it is. My problem all started when I ran a tree limb through the front sprocket and and now the quad just shuts off everytime it’s not in neutral and loud strange clunking noise, also rolls in gear with the motor off. Any tips if I should just do it or bring the motor to the shop every Yamaha dealer has told me the need the quad in whole but this I definitely I feel is to get more money for pulling the motor themselves. Any suggestions would be greatly appreciated thank you, can’t wait to get back on the trails!
I’m not trying to be rude just genuinely curious do you make money at the racing is it enough to make a living without another job or do u do this on the side somehow ?
Thank you for the video. I need to split the case on my ‘14, and clean the screens. Got some debris up top and grooved the journals in the head and cams. Unfortunate but I’d rather that than a motor. Your video gives me confidence.
Thats a bummer man but it could always be worse i also did a more recent tear down video and a new rebuild video as well its a 3 part series. I am working on another rebuild video now that will be one longer vid of the whole entire build.
@@ononewheel7 thank you 🤙🏻🤙🏻 I look forward to it
Bought a 05 yfz450 lastnight. This morning on the first ride the piston exploded into a thousand pieces after maybe 4 minutes.
Oh man sorry to hear that! How much time was on it do you know?
thanks to you a completely rebuilt my 05 yfz450 and it runs like a top
Thats awesome glad my videos can be helpful
Keep the video coming I love watching them plus makes a good how to thanks
Thanks for watching!
Definitely know your way around a 450
I have done a few 😬
I’d say you’ve done that a time or two.
Just a few haha!
Where can I buy a fly wheel puller like that one
Rockymountain or amazon or ebay
Motion pro is what you want
Best yfz RUclipsr
Thanks man
Good work
Thanks man
Hello. I am trying to rebuild the engine of my yfz450 2004. when I was disassembling the housing a ball came out like a bearing and I don't know where it is from. will you have idea where it goes?
Its probably for the clutch push rod! The push rod goes in first then the ball then the trust washer!
@@ononewheel7 thanks so much!!!
Anytime!
I just picked up my first ever yfz 450 04. I just got into riding a year ago.. but I've been hooked with blasters and raptor 80's lol( for my kids) but I've been building engines blasters and 80s anyway yesterday I picked up the 04 yfz450 and its not supposed to be working (I haven't tried cranking it. Since the guy says top end is bad) if oil upgrade is done what else should I be doing like I've read about stator not charging battery maybe upgrading crankshaft, bigger bore and piston? Cams or cam? I also have a friend with his 05 yfz450 that has been sitting for like 7-8 years but he wants to do big bore upgrade any recommendations maybe also a crankshaft bore set up cams and port & polish.. so since I did the engine rebuild on my 05 ram 1500 and other quads he has some faith in me and wants me to fix his.. any help would be great..but even since last year I've been watching these yfz 450r videos u a bad dude..and thanx for sharing them.
My builds i send the heads out for porting and cams and +1 valves. I run stock bore but high compression piston’s and a bored throttle body and fci intake keep in mind this is for the efi yfz450r the carbed models while you can do the same you would need to jet it for any of the above mods. I always do new oem cranks and all the bearings in the entire cases. I prefer high compression over big bore kits for racing.
I know im a little late but I was wondering if you reused the headbolts a couple times?! Or do you replace with new everytime you do a rebuild? Thanks!
I always re use them per the manual it does not say they need to be replaced.
@@ononewheel7 perfect! Thanks for the reply!
Anytime
Hello dude, can you guide where to start the teardown. Thanks
I have some videos of it they are time lapse but you can follow how i did it!
What kind of crankcase puller is that you use?
Tusk
Dear, can I ask you a question?
it turns out that the second gear of my yfz450r is not good.
I just disassembled and I realize that when I insert the gear the two pinions rotate on the axis.
Im not sure what you mean?
@@ononewheel7 I have disassembled the whole engine because the second gear was not working.
Once disassembled, I noticed that the sprockets of the second turn on the axis of both, is that wrong?
I don’t believe so
@@ononewheel7 my english is bad
@@juliopachecoaravena8847 no worries man if you can send me a video threw instagram or facebook or email im ononewheel7 on instagram and my email is in the about me section
Do you know the size socket that’s needed for the rear motor mount?
22mm
hey man, what’s the name of the tool u used @ 4:39
Fly wheel puller its from motion pro
@@ononewheel7 do you remember if it was a 33mm or 35mm puller?
33mm
@@ononewheel7 dude, tysm! fr, best channel ever man. Thank you! taking apart a yfz450 engine for the first time, and u made it a whole lot easier. God bless you man!
Glad this could help anytime bud 🤘
Great video.thanks
Thank you!
Where are u located i got 1 that need your experience on it these shops are no good
Rhode island!
I need a complete rebuild how can we make its work u can email me tdeese30@gmail.com
I need some tires for my yfz450 05
I run GBC’s and love them i have some videos of them here check em out.
Is the bottom end basically the same on the carb models other than the oil screens other than the oil pick up I’m currently in the process of making sure everything’s in place and all my dowel pins are in etc before I reassemble I’ve been using your videos as a reference
Its kind of similar i have done a carb engine years ago but never videoed it! Do you have a manual?
@@ononewheel7 yes I’ve been following both it’s my first time rebuilding a bottom end! Only thing I’ve had trouble with is the damn shift forks but I just removed the little pins and than got them in place like that
Ya thats how i do it as well!
At 22:10 what was it that you were telling us not to lose?
The lock washer that goes w those gears
Hey man what's that oil or oil additive u are talking about we should try? It's hard to hear u over the music. Thanks in advance!👊
I run blud racing lubricants its really good oil and doesn’t break down fast like others ive used in the past! I have a oil change vid i did not too long ago have a look at it!
Faster then lihgtening 👍
Thanks man.
I know these engines pretty good 🤣🤣
what size is the flywheel puller. im trying to rebuild mine
Im not sure off the top of my head if have to check when i get home!
I have a 2008 Yamaha yfz 450 I bought from my buddy with a broken case right at the clutch shaft I put it all back together today and the clutch shaft is now harder to move and won’t go back on its own with the spring any idea?
Is it bent?
@@ononewheel7 no I took thclutch rod out and set it in there right I’m doing a whole motor rebuild got to part 3 of your videos before I realized that you have a 2018 and not a 2008 but very similar
Ya ive done a couple of carbed yfz’s but never videod them
Are you going to make the video from that last season ride at mx101
Its already up from last weekend!
Thanks just saw it going to watch now
Thanks for watching!
and here i was thinking a cannondale engine was easy to pull apart. Time to build it better & stronger
Yup shes gna be good as new when I’m done
@@ononewheel7 i have to do the same job on that kfx450r i got. someone didnt run a case saver. chain came off and destroyed the case were the clutch rod goes into the case
Damn ive done that b4 w my old kfx as well and once on the yfz thats why now i run the glann case saver!
Hey I need a little advice I just recently paid a guy to rebuild my motor since then I've had two leaks the first one was easy I replace the inner clutch gasket. Now I've got one right in the center of the case so I'm going to have to tear the whole motor down everyday it's getting worse. Can you help me out with what gaskets I need to replace on the way down to the bottom of the motor. I know I need a case splitter what about a flywheel puller? I'm putting together some stuff in my cart on Amazon like I said assembly Lube yamabond , copper gasket coating anyting else you can think of I greatly appreciate
Just buy a complete gasket kit from cometic gasket
Yamaha bond
Flywheel puller
Tusk case splitter
Why not bring it back and have them fix it?
It was a friend that rebuild it me and him got into it we're not friends anymore. Because the kit I ordered on eBay the gaskets was green even the guy that sold them to me told me they should be green the last time it was leaking I pulled it apart and replaced it and it was a red gasket so that makes me wonder what else out that $800 kit I bought did he not put in there I paid him good. I think he just use the old gaskets and put gasket maker in there. I'm new to this but I'm going to watch your videos and some others and I got a service manual
I ain't really got the money to worry about it right now but I'll slowly get what I need and study up on it
I was going to go with OEM gasket kit. Is cometic just as good? Will it be okay to spray every gasket with that copper coating spray
Bummer man
Is it the same for a 05?
No its kind of similar but this is for 2009-2020 yfz450r
The 05 would be a carb model ive done those but never videod it 😫
How big is that 2x4 cradle you made?
12x12
i just got a 2020 yfz450r se what mods should i get for it, as of now it sits bone stock,
What are your plans for the quad as far as riding or racing?
How many hours on that motor? Great video.
It was 7 months old
Respect John. As I can see you doing this just for a second time - hahahahha, no more! Just a quick question - as I see the video Engine is looking really good and clean inside. What is idea of tear it down? Do you heard some noice or anything that make you tear it, or just to be sure that everything inside is OK?
The head needs to be sent out for a service the quad wouldn’t start after that last woods o cross race i ran and i have a small crack on the cases which doesn’t affect them at all so I’m gna replace the cases and do a new crank,bearings and then a new piston,cylinder! This one should have lasted a little longer but after the mud at ironman it trashed the top end i had some get in the intake and sucked threw!
Tear down in less than 40 mins I think you’ve done this a few times lol. Love these in real time vids.
Oh ya I’ve done a few haha!
Where you from I need help
Rhode island
Great job dude ..I couldn’t put it back hahahah
Thanks bud its not that hard 1st one is always nerve racking but after that its easy!
good job 👍🏻
Thanks!
Record time! Love the real time video. Why new cases?
Has a small crack by the front engine mount no leaks but its bothering me haha! And the engine it self just needs a refresh!
Hey john where do you get your cases? I broke mine around my shifter and need a new set who do you suggest my bikes an. 08 so I figured Yamaha wouldn’t carry it anymore, amazing video man
Sometimes ebay or rocky mountain i always just search for deals!
Thanks man!
ononewheel7 okay same here, I’m going to do my rebuild off your video lol gave me confidence hahaha
Sweet man good luck make sure to grab a manual!
U deff know these motors. Thats for damn sure lol I just bought the 520. 5mm 98mm kit from bp racing. Going to get headwork done. U think stock cams, valve train with kibblewhite guides and seals be ok? If I went stage 2 later could I still use stock valve train? Thanks for any input man!!! Liking these yfz vids. I'm a banshee guy but I need a reliable quad. Reliable.....ish 🤣 🤣
Thanks man! I have built a few 🤣🤣
I would defiantly add a cam in there i run a web intake cam usually everyone keeps the stock exhaust cam!
Anyone know where I can get a yfz 450 head
Efi or carb?
Usually eBay has some you could check there muffs motorsports or stone concepts are good stores to search and the yamaha groups on facebook as well I’m sure you could find one
Wish there was no music. Cant hear what your saying on some parts of video.
Sorry man this is an older video now i use a separate mic for better audio.
I can't believe that I just watched you strip down that engine in less than 40 minutes. I guess it's not your first time at the rodeo!
Ya i guess i have done a few of them 🤷♂️
@@ononewheel7 It's a fantastic video. I have a 2009 450R that might run for a few seconds, then stop, and when I try to fire it back up again, the engine won't even turn over... almost like the battery just lost all it's juice. I can't find anything loose electrically, so I'm thinking it's internal now. This video is a great motivater. Thanks.
When the keys on do the dash lights all work?
Any engines codes flashing?
Id your battery shot? Double check the connections and grounds!
@@ononewheel7 First thing I did was put a new, fully charged, battery on it. All dash lights come on... Not sure where I'd see an engine code flashing... if it's on the dash panel, I'm not seeing anything there. And I've checked all electrical connections, and all wires looking for splits and chafing, and can't see anything. Maybe I'm missing something. Interestingly though, I did have to replace the rear subframe after my kid took a tumble and bent the oem cast unit. It ran for a couple rides fine, then just died, and since then I've had this problem. So I had to re-run all the wiring back to the battery box etc. So I've paid particular attention to the wires there, but like I said, I can't see anything.
Tim Lawrence id double check all those wires
The plug for the rear brake light is also the same plug as the crank sensor but the crank sensor is white and the brake light is black I’ve seen people mix those up b4 and he quad wont start?
Also make sure that little ground pigtail is plugged into the negative main wire
Also under the battery box there is a small sensor thats the tip sensor make sure that is plugged in as well! If its not it could cause the same thing to happen!
Just wondering how much/how hard would it be to swap the transmission in my 19 yfz450r. I have the motor all disconnected and pulled haven’t started tearing into the motor at all, quite nervous cause of how new it is. My problem all started when I ran a tree limb through the front sprocket and and now the quad just shuts off everytime it’s not in neutral and loud strange clunking noise, also rolls in gear with the motor off. Any tips if I should just do it or bring the motor to the shop every Yamaha dealer has told me the need the quad in whole but this I definitely I feel is to get more money for pulling the motor themselves. Any suggestions would be greatly appreciated thank you, can’t wait to get back on the trails!
Awesome video btw
Grab a manual and do it yourself its really not too hard! Were are you from?
ononewheel7 that’s what I was thinking, upstate ny, Binghamton area.
I am in that area a lot for NYOA races!
I’m not trying to be rude just genuinely curious do you make money at the racing is it enough to make a living without another job or do u do this on the side somehow ?
I make some w contingency but not enough to live off of really only the pros do i do it just for fun!
Whats up
Whats up man
It would be awesome to turn down the shit show sounds running in the background so we can hear you 👍🏻
Sorry man. This is an older vid on my newer stuff i use a mic on me for better sound now and play music much lower if i am talking.
@@ononewheel7 no worries John. What was that oil you were running that was super slick ?
I run blud lubricants and just assembly lube when putting engines back together.
@@ononewheel7 thanks bro 👍🏻
@@daveydave9884 anytime man
Well you lost me at tools I need 30 seconds in.. just come scoop mine up. 🤣
🤣🤣🤣🤣
Ship it to me ill fix you up hahah!
No one in my area wants to even look at it. I at one point had 3000 and still no one was interested. That was 3 years ago...
THe "OFFiCial" K.A.M... =P is this a yfz450r? What is wrong w it do you know?
@@ononewheel7 yes, I think we had timing issues, i remember riding it switching to 2nd and a little bang and that was it.
Damn so maybe it jumped time thats an easy fix!
No me suscribo porque le pegas al destornillador con el alicate nomas
Ok buddy 🤣🤣🤣🤣