How to rebuild 4 stroke engine on a dirt bike - RMZ450 build
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- Опубликовано: 31 июл 2024
- Hey guys, in this video we met with Jay Clark and did this incredible 4 stroke engine build, we took the engine from my rmz 450 dirt bike and did complete rebuild using some of the best aftermarket parts and some OEM as well. Hope you enjoy it! This is the video from my rmz450 build series. Cheers
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4 stroke dirt bike engine rebuild
How to rebuild 4 stroke engine on a dirt bike - RMZ450 build 
Авто/Мото
Wow! such a skilled confident mechanic
thank you
@@brad5664 NJ
Awesome vid rado i think its great that J and brad are such talented mechanics willing to teach you everything u need to know when it comes to your bikes I love it man keep it up
Thanks Aaron, yea they are great! Jay has been great friend since the day we first met.
That was really impressive to watch someone who so obviously knows what they're doing...he could do it blindfolded! WOW!!!
Thanks for this video guys, great job all-round! Watching Brad at work is time well spent for sure, he knows his stuff.
he sure does! more videos with him coming soon
@@dirtniron does he have a business to allow people to send engine to him for rebuild?
Loved this video, really interesting as someone who is wanting to learn more about the 4 stroke engine! The guy who did it is so talented! Cheers guys
Glad you enjoyed it!
Awesome video and a great mechanic! Thank you for sharing!
This video was sick, I know both Jay and Brad and they not only build awesome bikes, but they are great people too.
agree 100%
Rebuilding my Aprilia sx 50 engine right now and gotta say that four strokes look like hell compared to 2 strokes
yea, couple more bolts on 4stroke ;)
moped gang
I have an aprilia sx 50 as well
Plus a 50cc engine is a bit more simple then a 125 because 50cc doesn't have power valves
Or you’re just dumb
I just got a 2013 rmz250 Sunday I love the bike rips and is easy to get comfortable on
Cool man, congrats!
Beautiful engine. Very good job🤩🤩
Love the video. Really enjoyed ! A yz450 is coming soon to me
Professional Work :) Very Nice !
This guy is a pro! great video! detailed where it should be.
Thanks for sharing with us Rado :)
thanks Nir! I got new dslr, did you notice the quality was little better? I got canon 80d now
@@dirtniron I didn't really, the quality is awesome though.
The thing that really gives a better quality is the lens ;)
What mic was used?
i used external Rode shotgun (micro) but it might not be all the way in.. I noticed late.. so I am not really sure if it was built in camera mic or my external.
I am using same STM lense as with t5i, it is sharper now and autofocus works much better too.
The skills this man has is amazing!
Brad is the man!
Great job Rado! The RMZ engine looks really good with low wear for 120+ hours.... That diesel engine oil you use seems to do a excellent job! regardless these guys did a great job on your motor! should pull very strong!!
Thanks Mackenzie! She might pull little too much now ;)
@@dirtniron maybe but you can just hold on tighter;) lol
Awesome video rado! I'm rebuilding my rmz250 atm, this is like a guide for me now haha
Cool bro, glad it helps ;)
These videos make me have so much respect for my mechanic... without him I’d be SOL... great job man!
glad you like it Jaiven, Brad knows his stuff!
Wow!. That looks great. And that guy does great fast work.
yea, he knows his stuff! Thanks
@@dirtniron thanks guys
Awesome vid rado! Can’t wait to hit cahuilla with ya when this beast is done!
hopefully soon! ;)
Im a nuby to the dirt bike world but it has become apparent me that I have stumbled upon some legitimate content here. Feeling Blessed.👍
Welcome aboard Mark, glad you see it that way! btw, you will love dirt biking ;)
Nice one Rado! Looking forward to seeing how that bad boy performs.
thanks bro !
man this Mechanic is a beast. can tell he's old school for sure he doesn't even use those tusk tool for anything. Man I'm impressed thanks for the video
yea, he is very good! @parapros on instagram
These time lapse vids are really awesome! So many ch can be learned in a short period of time! You dudes brighten my day every time I watch Dirt and Iron! Stay Moto Vated!!! Do y’all sell t shirts? lol! Thanks again!
Yes, and shout to Dirt Bike TV as well! I want to be you guys when I grow up! Though I’m 51 so I guess I’m already grown up, lol! I still want to be like you guys when I grow up though :)
haha, you are funny! Glad you like the videos, appreciate it!
Awesome set of skills. What a talent. 👍🏻
Thank you! Cheers!
great video i want to do that to my 250 some day and hope to learn a lot :)
Master work.
Awesome build! I have 2013 rmz 250 and I want to remove the judder spring from the stock clutch, but its not clear to me how should i do it. Should I remove the judder spring, judder spring washer and the smaller friction plate and add a normal friction plate?
i always hate putting the timing chain back on :D nice video!
Rado your very fortunate to have jay as a friend he is a legend....that motors value just went up about 2k because brad built it at jay clarks house.....brad was right at home doing this.....you can tell he knows a thing or two about a thing or two.....while us amateurs study manuals ...brad is who we one day aspire to be....
Thanks for the Props ....Boss man
yea, Jay is great guy, he really loves dirt bikes and the best part is that his heart is way bigger than his ego ;)
@@dirtniron thats awesome of you to say..looking forward to the 450 vids keep up the great work...i been watching since you first got the old warehouse...take care man
Even 4 hours is impressive wow. Master at his craft.. They do seem a bit easier to do compared to a crf. Great video.
thanks man, glad you like it!
Superior technician loving the videos
A true professional.
Good job, congratulations 👌.
Currently stripping my 13 rmz450 down to send out to this guy. Saw him all over your page and had to give him a shout when she finally quit on me after 200 + hours of supermoto riding.
Right on man! Brad does great work 👍
Great video
Great video! :)
Can wait to hear that thing
Great job guys
thanks Martin!
Nice ! Very good mechanic
thanks bro!
Wish i could do that sucks was looking frord to ridening. I keep you up to date
What would cause coolant to come out of the over flo when it warms up?
Must go to sleep but I had to click and the like button. I'll watch it in the morning :P
look forward to hear your feedback! nite~
Very informative.
Cool video Rado. I wish I had them skills.
Brad builds 2-4 engine a week, he is pretty good ;)
Nice video Rado the perfect video to watch when eating breakfast lol...
What did you have for breakfast? Just curious what is normal breakfast in australia ;)
@@dirtniron Vegemite on toast of course lol...
I had to google it, looks delicious 😉
Skills hammer good tool
great video
Are there no torque specifications for most of these bolts? Awesome video. I've got an opportunity at a really cheap '07 RMZ450 with a seized motor. I've never rebuilt a 4 stroke, but I'm motivated to try.
yes there are, we followed quite a few. good luck with your project!
You don't check run-out on that hot rods crank out of the box?
hey can you say me which tool i need for the flywheel from the ignition m24x1,5 or m28x1.5 Greets from Germany
Brads my mechanic does amazing work!!!
he sure does!
Where is he based out of? I’m in Fresno and after seeing his work I would like to use his service. Someone who actually knows what he’s doing and seemingly cares about the build.
Awesome
Very awesome video, can you do a rm250 engine?
I am currently doing this exact engine and kit. This video serves as a great reference. Would love to pick that guys brain building it. Clearly not his first rodeo. Hahahaha
cool, glad you found it helpful!
handy manny ahh hammer i din see a case splitter used this man is a legends
I was rebuilding my engine today slapped the top piece where those arms go up and down but it won’t turn over unless it’s off
Tighten those casing bolts opposite to each other
What was that part at 6.00 thank you
Love 4 strokes yep
Incredible 4 stroke rebuild, everytime you ride one
every other time as long as you do your oil changes often ;)
Love the video great bunch of information for noobs like me wondering what a rough price for all the required parts cost you in the end
Glad it was helpful! I went all out so its was little more expensive but i guess you can rebuild it around $1500
Why don't 4-strokes have a small-end bearing?
@ 19:00 That's Rado singing. Pretty good!
Haha, i wish ;)
@@dirtniron what is the name of the song???
Lovely from Tanzania 🇹🇿 would you help me to get some parts like block and Piston kit
Its case bye.little spriot. Can you weld
Nice build! Im early this Time 😀
Amazing, can you guys come to the east coast to my garage next?
And put on some gloves!!! Lol
let me talk to Jay ;)
mR dirt on . what a diferent cam chain timing . between kxf250 and rmz250. .2014
I have a2017 rmz250 that needs a rebuilt.can you guys do it for me ?
How much would the labor on something like this cost? Parts estimate? Also, can you expect a power increase from the new piston (same compression? mass?)? Would this be a got time to do any polishing/head work?
I used stock compression piston, no porting or polishing, still it should run better than before, the engine was little tired, specially the clutch and I am also getting hotcams and full fmf system, I am expecting some power gains for sure
Does anyone know the valve clearances?
Hi could you please tell me what song that is at the end of the video
here you go ruclips.net/video/dBSFE-cNPVU/видео.html
What's the name of that last song? Good video just did my 2012 rmz 450. Thank you
sorry, dont remember
Did it drive anyone else just a little nuts to see bolts put back in with cross patterns?
Hey Rado the video came out very good ...this is Brad the one that did the motor...lol
but that was awesome
Hey Brad, good to see you here and glad you like the video! you did great job, thanks again!
Hello Brad! Awesome video, do you rebuild engines for the public? I am at about 120hrs on my 2016 450X and am looking to have it rebuilt.
@@stacksmasher yes sir ..
just DM me and ill give you info
thyx
@@brad5664 Looks like your account does not allow DM ; (
I'm also interested in a engine rebuild
Did he check the ring end Gap or did I miss that. maybe lap the valves in or a valve job
yes is did check ring gap it was fast i didnt even see it ...and never lap in ti valves you would ruin them ..
How do you keep track of the bolts and screws
ziplock bags and marker
Did u skim the head and cylinder block before installing it back?
No, buff and clean
Is it needed to use a hone for the cylinder when changing piston on a Sxf or other nicasiled cylinder? Or are there something else you can use that you have in your house?
check other comments, Brad (the mechanic) explains what he did... its not really a honing
Dirt N Iron thx Will do, did check a bit but not all way! Guess I was one of those lazy ones on the internet today! Haha. Great video and thx again for answering 👌
Quick question for you. How many hours do you go before replacing crank on a 450?
Thanks in advance 🙏🙂
hmm.. i did mine on 120h, but it would be able to stay for more.. maybe 150-200.. depends.. but its better to do it before the damage happens
Excelent jobs
Here in brazil we put these 450 pistons on national motorcycles.generating around 55 hp.surpassing those imported on the tracks
cool!
well since so many people are asking about the cylinder hone we did the hone is called a Brush Hone It's perfect for deburring and deglazing engine cylinder walls
its made just for Nikasil cylinders ....
Hey Brad quick question, whats your opinion on the idea thst this type of hone ruins the thin niksil coating? About to put my first top end on my 19 250 xc with 100 hours, cross hatching should be fine, would you recommend honing anyway to ensure proper ring seating?
@@davidjo997 ya if you have hone thats made for nikasil if not you can use green scotch bright pad and contact cleaner ..you want to get the carbon build up and deglazing the cylinder that will for sure help with new ring seating
wish you could find a video that explains it all on how to do, hard to follow this one especially when trying to line bits up & were every thing goes in correctly
Buy a manual or take pictures with your phone as your taking it apart
He has gold hands !
I use wrench rabbit kits also. However you skipped out on installing all the other bearings other than the crank?? Why?
i am not sure now.. I think the oem were still pretty good.. dont remember..
If i tried to rebuild this, there would be a box of bolts and bearings left over, and it would not run🤣
Great job👍❤
Thanks 👍
Jay, looking good
:) he is staying in the shape, riding like 4 days a week, i wish I can ride that much
How can I get in touch with brad? I have a 2015 RMZ 450 I want to get rebuilt.
do you guys have a shop I can send an engine to?
get in touch with @parapros in Instagram, thats Brad who did this engine
Good electric torque wrench 😳
Noice, noice, weddy noice :-D
That is sick and wish raptor 250 if you guys can try work out on Yamaha raptor 250 that be awesome to see next time if someone asked you if can rebuild some of 2 wheelers/quad that be nice to help out to look after the engines
thanks Mike, lets see what we can do.. but we are mostly 2 wheels guys
@@dirtniron Ive lived in Aussie area
what song is it at the ending of the video please.
here you go: ruclips.net/video/dBSFE-cNPVU/видео.html
😮😮wow nice
What songs did you use at the end I can't find them .
sorry man, I dont remember, cant you do the search to find out ?
What’s the song at 20 minutes
9:28 why don't you use ice for cooling bearing and easy install them? Or maybe compressed spray air like air duster
we heated the cases and the bearing went right in, no issue at all
got it. just asked about it cuz i am going to do same with my engine soon. thx for video.
@@Aabbcczzxxcc with heating the case the bearings just fall in i was only using a hammer because its HOT but they fall right in
My 2010 yz450f has 120 hours on it, should it need a rebuild?
I guess its getting there.. sounds like a good idea , it all depends how you ride it..
I guess the crank just slides into the bearings? I was under impression you needed to used the puller tool.
it depends how well you heat up those bearings..
oh dear, I was hoping to see kick idle gear removal and instalation as I'm now having issues with it and you skipped it :-| Do you happen to have that piece somewhere else?
sorry Jakub, I dont think I have that on the video.
@@dirtniron that's a pity. Do you remember if your gear had a shaft pressed into it that rotating inside the case or it has brass insert an it is rotating on an insert that is pressed into case? My issue: thumpertalk.com/forums/topic/1329525-seized-kick-idle-gear/?tab=comments#comment-15449144