As a retired machinest. Mostly precision grinding and dealing with areas of preasure seals and tight sealing areas . I would advise Getting the surface reworked.
That mating surface will give you nothing but grief down the line. Having it resurfaced is undoubtedly the move. Given it’s the fiftieth anniversary and a one year only color-way, I imagine you ask a little bit more for this one all cleaned up and dialed. Knock those stickers back, dial it in, clean it up, and you’re in great shape. You know all this. Much love from Massachusetts.
When you do head gaskets I recommend resurfacing the head and cylinder . At least with a sand paper on a glass or granite surface and doing a 8 motion. That would help the seal and remove warpednes
THE HEAD NEEDS TO BE FIXED!!! What you got is known as a torched head, even the smallest imperfection on the head that can interfere with the head gasket WILL make it leak no matter how small. I would either send it in and have it fixed or weld it with some aluminum welding sticks and resurface the head. Good luck 2vintage 👍
Just rebuild an 07 Yz250f that’s having trouble idling for long with the choke off now, going to check my carb boot! You literally taught me everything I needed to know to complete my rebuild lol thank you
@@adambooth9630 I’m going to recheck that as well as I know one of the exhaust valves was left out of clearance spec as I didn’t have the proper shim. That being said the valves were further out of spec before I started the rebuild and it idles fine.
Easy to tell if you have a low spot in that area on the head. Colour the surface with marker then use some super fine grade sand paper (2000grit) or close then place on perfectly flat surface and run the mating surface over the sandpaper a few times and the low areas should show as the marker will have not been removed. Then you should have your answer. Good luck with it. 🤟
Got hands full with this one... As soon a customers drop off bikes we do quick oil check for that, part of the diag process now, also compression test. Then we can give a good quote.
That is definitely the cause of the smoking. Take some spray contact cement and glue a sheet of sand paper to a piece of glass or other flat surface and lay the head on it and evenly rub the head across the paper changing directions a couple times. Then apply a little copper coat spray to the gasket. Boom, done! You got this.
First thing I would of done before buying it is....Check the oil lol,try starting it up and see if it may be locked up,and check if it goes in gear and at least try to push start it a little and listen for noises.Could of gotten a better price maybe
I love the Classic Black & White Yamaha Decals against the Yellow. it’s classy every time & reminds many dudes of the Old YZs from when Moto-X was Moto-X.
Moto-X was ridden outdoors by guys (with full time jobs) that slept in vans/campers/tents (not motor coaches or hotels) on weekends for glory, #1 plates and/or a modest $ purse to those on the podium. I mean no disrespect to contemporary riders & their equipment, mechanics & comforts…that’s just progress.a ‘78 Yamaha YZ100 taught me how to be a better rider in 1989, so when I got a hot CR125, I was ready to rip.
I had one of these a few years ago. I got it cheap bc it needed the valves adjusted and it’s the most fun I’ve ever had on a quad. I’m more of a dirt bike guy but I’ll forever love that thing
My Canadian brother amazing vid as always. Im a mechanic of 20yrs n still learn from your vids. This should be compulsary viewing for all apprentices 🤣
Fix the head if the most problems with this model revolves around head gasket issues . Looks porous even if it seals at first . I bet the moment the machinist looks at it he’ll agree that will be a problem if not addressed
Plate of glass and a sheet of 400 grit wet and dry sandpaper. Remove the studs on the bottom and just gently flatten the head surface. You can then see if the damage is ok to run with. Afterwards use a decent straight edge (steel ruler) to check for flatness.
Joe.may as well send it in for work since cam lid bolts are stripped in head also that will be insurance things get tight and that bad spot is better sealing tolerances.may as well do two birds with one stone.worth the wait.snooky pa.💥✌️👍💥
Stock jetting on the 2006 was a 155 main and 42 pilot. 2004/05 had a 158 main stock. They went down in 2006. Don't forget to add a half a turn or so on the air/fuel screw! Will definitely help.
Coolant jackets in head could be cracked causing coolant to leak in through the valve holes. Id take a flashlight and inspect them and maybe pull valves and check valve holes. Could also be cylinder coolant jackets
YFZ 450 head bolts are torque-to-yield, which means they can only be used once. After that they can be problematic and unreliable. Bought one once that didn’t run for that reason. Replaced with new bolts and ran fine.
For the head gasket I always use permatex copper head gasket sealant the spray can type you spray both sides of the head gasket down real good turns it gold colored when it tack up and put it on I've used it on head gasket so you wouldn't believe would ever seal and it works great!!
Following all way from uk watch all your vids learn alot id deffo sort the head out dont think just a gasket would do. Do it right first time save in the long run
Just surface the head a little use a flat peace of glass to work on and really fine sandpaper you'll see the low spots pretty fast doesn't look like it needs much
If you get the head shaved slightly it will seal better and give slight bump in compression. Depending on the cost it's a win, win. Lol. Keep up the good work.
i think if you have a hunch it might be an issue, it will be. i was expecting a crack somewhere tbh but i think you have found the answer with that head surface. pretty sure it will clean up well with a bit of tlc and makes some money if done right
I have massive respect for you I want a kx250 or kx450f dirtbike I’d love to see you build a 90s Kawasaki kx250 I’m in Wisconsin too also but I’m working on getting a 97 Suzuki rm125 I’m super excited
That Head will leak under pressure for sure, its to pitted. It probably could be aluminum welded. it won't warp, but would need resurfacing after. Should be cheaper under $100, than a differant used head $200+
the previous owner wanted a suzuki im guessing with the blue touches great job with the videos the anodized caps you see on the rear calipers are usually e-brake deletes keep up the good work and good buys
On the head, you can take a sharpie and color that damaged area black. Then take a very fine grit large whetstone and run it over the surface and you’ll see if you have any low spots where leakage may occur on the sealing surface.
Top of the piston looked that good because it was literally being steam cleaned 😂, surface that head it’s worth the effort to know the surface is true and flat
I'd definitely agree with the spot u think on the head between it and the valve. Along with head bolts not being so tight. I'd send her better then doing it twice. That for sure cud have been it. Good luck man
In regards to the Head I guess it all depends on whether , A- like being stranded. B- want to push it back. C- what's your time is worth. The last guy probably thought it would be fine too. A good tech would go ahead and just have it resurfaced or replace it pending cost vs value, a seasoned Pro-Tech that warranties his work would very likely to go as far as replacing the head bolts ,especially it's torque to yield. If you don't then there's no reason to get a new head gasket and use the old one clean it up with some Scotch-Brite Debbie some rvt and or graphite on it and crank it down tight +5% . when it fails in the future that is where it will fail. you seem like a smart dude so, I know where you pretty much lineup on that or you wouldn't of asked about 3 times. Either way pretty informative can't wait to see running.
Had one cone in a few weeks ago, guy said its using oil. So he added some fresh heavier oil to it. He put full container of engine restorer and hlf qt of 80w 90 gear lube in it. It ran, but my god did it do some damage. Still waiting for parts, he said do whatever we need to do to fix it. Had to have all new piston, ring, crank, etc.
If you use a flat peace of glass you can glue down some sheets of sand paper and deck sand that head. The glass is flat and its about as straight as you can get so you can get that imperfections out. Just finish sand smooth
Get your cylinder head resurfaced, it’s a better idea than running it like that. I have a 04 yz250f that I rebuilt for cheap and it had a divot in the head so I got it resurfaced for $150
By the looks of that head it has never been milled let alone cleaned. Planing/resurfacing/decking a head using a flat surface with fine grit sandpaper is always a must when there are deformities present. Make sure to check what compression ratio the current aftermarket piston.. that will give you an idea what your squish is going to be after you resurface the head. Also it would be wise to check the surface of the old cylinder as well. That will tell you how long the problem has existed. The number one talent that a good mechanic must have is the ability to diagnose an issue... you my friend are second to none! Now all you need are the right tricks and tools up your sleeve to resolve these issues. I've followed you now for a few years and your progress has astounded me! Keep up the great work!
Pull out the locating pin. Find a flat/level surface 800 to 1000 grit sand paper wet it down and resurface it your self and send it . It don't look too deep .
Yeah that's another thing. Sequence and torque specs are a must. I can't work with my brother and his friend cause they never torques shit. They offer to help me in my shop and I pissed them off cause I told them no. My name is on that and don't want a lawsuit. I mean fallow torque specs you should never worry
Hey joe ! Dont forget cam bolt heli coil too . Dont know if a second hand head is an option ? the other ones you have off other 450 were junk wasnt they ? Id maybe get it mildly cut /surfaced ? and heli coil . Nice looking bike it will be tho . Turning in to a yamaha quad shop hehe ! All the best :-)
loose Bolts so there its the reason at oil and water have mixed,but i still would take the parts in machinest to the surface cleaning and take out thats much at all imperfections are gone because its can still blow casket.
by the look of the top of the piston also a sign of head gasket leaking, also you need a new bolt and possibly a tap? also i feel like that spot will leak eventually
As a retired machinest. Mostly precision grinding and dealing with areas of preasure seals and tight sealing areas . I would advise
Getting the surface reworked.
Yes!!
yeah even its dosent matter how small imperfection there is those need to take out and Resurface at its level and can handle big bressures.
I agree. You said that these things blow out head gaskets anyway. No sense in giving it another disadvantage.
@@teemuronkainen Greettings From Turku :)
Absolutely .
That mating surface will give you nothing but grief down the line. Having it resurfaced is undoubtedly the move. Given it’s the fiftieth anniversary and a one year only color-way, I imagine you ask a little bit more for this one all cleaned up and dialed. Knock those stickers back, dial it in, clean it up, and you’re in great shape. You know all this. Much love from Massachusetts.
When you do head gaskets I recommend resurfacing the head and cylinder . At least with a sand paper on a glass or granite surface and doing a 8 motion. That would help the seal and remove warpednes
Figure of 8 motion, then lift and turn 90 degrees and repeat until grey coloured uniformity is achieved.
This! 100% will work.
This is what I do too.
what was his outcome?
thats a great idea !! super fine paper
If I ever ask myself “will this be fine” I know immediately, off rip, that it’s so definitely not fine lol.
THE HEAD NEEDS TO BE FIXED!!! What you got is known as a torched head, even the smallest imperfection on the head that can interfere with the head gasket WILL make it leak no matter how small. I would either send it in and have it fixed or weld it with some aluminum welding sticks and resurface the head. Good luck 2vintage 👍
Maybe sand the head a little on the granite block with sandpaper just to make sure it's level.
Just rebuild an 07 Yz250f that’s having trouble idling for long with the choke off now, going to check my carb boot! You literally taught me everything I needed to know to complete my rebuild lol thank you
Awesome, glad I could help! Hopefully it's the carb boot causing you problems!
I suggest getting the valve clearances checked, that is a common sighn
@@adambooth9630 I’m going to recheck that as well as I know one of the exhaust valves was left out of clearance spec as I didn’t have the proper shim. That being said the valves were further out of spec before I started the rebuild and it idles fine.
@@2vintage what’s your plans on it??
Just resurface it your self! Get sand paper and something that is super flat and slide the head across it in a Circle motion.
Do it all while your in there, piston, valve seals, cam chain, and get that head surface machined👍
Easy to tell if you have a low spot in that area on the head. Colour the surface with marker then use some super fine grade sand paper (2000grit) or close then place on perfectly flat surface and run the mating surface over the sandpaper a few times and the low areas should show as the marker will have not been removed. Then you should have your answer. Good luck with it. 🤟
Boy you a gluten for punishment with them YFZs 😆 the only way you can get one that isn't junk is get it as close to new and stock as possible!!
Got hands full with this one... As soon a customers drop off bikes we do quick oil check for that, part of the diag process now, also compression test. Then we can give a good quote.
When you know in your heart of hearts its a cylinder head gasket problem but you're in denial...
🤣🤣🤣
That is definitely the cause of the smoking. Take some spray contact cement and glue a sheet of sand paper to a piece of glass or other flat surface and lay the head on it and evenly rub the head across the paper changing directions a couple times. Then apply a little copper coat spray to the gasket. Boom, done! You got this.
Your content is the best,you put out more videos than any other channel... your deffently a inspiration for others to fix their own junk..
Don't let your dirtbikes an quads go to junk I say. Keep em clean an running top notch . They are super expensive new!
Goonzquad and Matt’s off road recovery also post videos this often👍
I love that you try but you've had so many machines you need to start learning from your mistakes!!
Cant wait to watch at lunch brake!
Yeah I agree with you guys on milling the head. I run my own mechanic shop and always send the head off to be milled and valves and shit re-seated
First thing I would of done before buying it is....Check the oil lol,try starting it up and see if it may be locked up,and check if it goes in gear and at least try to push start it a little and listen for noises.Could of gotten a better price maybe
Even in this condition he basically stole it. A little love and a little machine work he can resell for $4500-$5000
@@bdog4u2 wow I was way off on pricing 🙄😆.I feel stupid now 🤧🤣
I love the Classic Black & White Yamaha Decals against the Yellow. it’s classy every time & reminds many dudes of the Old YZs from when Moto-X was Moto-X.
Moto-X was ridden outdoors by guys (with full time jobs) that slept in vans/campers/tents (not motor coaches or hotels) on weekends for glory, #1 plates and/or a modest $ purse to those on the podium. I mean no disrespect to contemporary riders & their equipment, mechanics & comforts…that’s just progress.a ‘78 Yamaha YZ100 taught me how to be a better rider in 1989, so when I got a hot CR125, I was ready to rip.
Sounds good! Gonna be a runner. That guy basically gave that to you, spendy bike!
I had one of these a few years ago. I got it cheap bc it needed the valves adjusted and it’s the most fun I’ve ever had on a quad. I’m more of a dirt bike guy but I’ll forever love that thing
My Canadian brother amazing vid as always. Im a mechanic of 20yrs n still learn from your vids. This should be compulsary viewing for all apprentices 🤣
Fix the head if the most problems with this model revolves around head gasket issues .
Looks porous even if it seals at first .
I bet the moment the machinist looks at it he’ll agree that will be a problem if not addressed
The pre - fuel injected models had a few issues but 2010 an up the YFZ450 is easily the GOAT. Best sport /race quad of all time.
@@Davido50 are u sure bout that bro?🤔🤣🤔🤔
That oil looks like whats in my toilet after a hard weekend
Need more fiber less liquid fuel,ha!!!!
A little Milky?? That looked like it was a vanilla milkshake.
Plate of glass and a sheet of 400 grit wet and dry sandpaper. Remove the studs on the bottom and just gently flatten the head surface. You can then see if the damage is ok to run with. Afterwards use a decent straight edge (steel ruler) to check for flatness.
Joe.may as well send it in for work since cam lid bolts are stripped in head also that will be insurance things get tight and that bad spot is better sealing tolerances.may as well do two birds with one stone.worth the wait.snooky pa.💥✌️👍💥
As an old Machinist. That head surface is toast. Surface it and check the jug mating surface as well.
I’d be checking piston and rings!
Head gasket fix won’t stop all that smoke sheesh
Stock jetting on the 2006 was a 155 main and 42 pilot. 2004/05 had a 158 main stock. They went down in 2006. Don't forget to add a half a turn or so on the air/fuel screw! Will definitely help.
i've use syncro metter tools to set carpurators in car or bikes,mopeds because if the flows are low or too high then its effect how engine run.
Wow , looks like a complicated motor, them 2 strokes, sont even compare. 👏
Sandpaper on a piece of glass is the best way to clean heads in my experience, can also resurface just time consuming.
You should put a litre of average oil through it to try and flush all that nasty oil out before putting fresh good oil in
Coolant jackets in head could be cracked causing coolant to leak in through the valve holes. Id take a flashlight and inspect them and maybe pull valves and check valve holes. Could also be cylinder coolant jackets
YFZ 450 head bolts are torque-to-yield, which means they can only be used once. After that they can be problematic and unreliable. Bought one once that didn’t run for that reason. Replaced with new bolts and ran fine.
For the head gasket I always use permatex copper head gasket sealant the spray can type you spray both sides of the head gasket down real good turns it gold colored when it tack up and put it on I've used it on head gasket so you wouldn't believe would ever seal and it works great!!
I bought some of that to try out. I will test it out net video!
I'd say to ask yourself one thing.. "If I were buying this quad, how would I have wanted it fixed?". Great vids..keep at it!
@@bdog4u2 I agree he half asses all his machines. Always in a hurry to ride them
Yeah I would definitely have a machine shop make the call on the head. I would certainly have it resurfaced or replaced.
I'm currently building a 2006 YFZ450! Useful video, thanks!
Following all way from uk watch all your vids learn alot id deffo sort the head out dont think just a gasket would do. Do it right first time save in the long run
Just surface the head a little use a flat peace of glass to work on and really fine sandpaper you'll see the low spots pretty fast doesn't look like it needs much
Give you a tip clean out the case with diesel it's oil base and will clean out the crap as well
If you get the head shaved slightly it will seal better and give slight bump in compression. Depending on the cost it's a win, win. Lol. Keep up the good work.
i think if you have a hunch it might be an issue, it will be. i was expecting a crack somewhere tbh but i think you have found the answer with that head surface. pretty sure it will clean up well with a bit of tlc and makes some money if done right
I’m super hyped I love your Vids I learn something new every time
I have massive respect for you I want a kx250 or kx450f dirtbike I’d love to see you build a 90s Kawasaki kx250 I’m in Wisconsin too also but I’m working on getting a 97 Suzuki rm125 I’m super excited
Definitely bring it to a shop
That Head will leak under pressure for sure, its to pitted. It probably could be aluminum welded. it won't warp, but would need resurfacing after. Should be cheaper under $100, than a differant used head $200+
The fun potential is strong with this one.
the previous owner wanted a suzuki im guessing with the blue touches
great job with the videos
the anodized caps you see on the rear calipers are usually e-brake deletes
keep up the good work and good buys
On the head, you can take a sharpie and color that damaged area black. Then take a very fine grit large whetstone and run it over the surface and you’ll see if you have any low spots where leakage may occur on the sealing surface.
Top of the piston looked that good because it was literally being steam cleaned 😂, surface that head it’s worth the effort to know the surface is true and flat
Definitely needs to be resurfaced in my opinion.
I'd definitely agree with the spot u think on the head between it and the valve. Along with head bolts not being so tight. I'd send her better then doing it twice. That for sure cud have been it. Good luck man
In regards to the Head I guess it all depends on whether , A- like being stranded. B- want to push it back. C- what's your time is worth. The last guy probably thought it would be fine too. A good tech would go ahead and just have it resurfaced or replace it pending cost vs value, a seasoned Pro-Tech that warranties his work would very likely to go as far as replacing the head bolts ,especially it's torque to yield. If you don't then there's no reason to get a new head gasket and use the old one clean it up with some Scotch-Brite Debbie some rvt and or graphite on it and crank it down tight +5% . when it fails in the future that is where it will fail. you seem like a smart dude so, I know where you pretty much lineup on that or you wouldn't of asked about 3 times. Either way pretty informative can't wait to see running.
Definitely re surface it. All positive
I would change the valve seal's since you're in there and on the head do a light sand on a flat peace of steel with 2000 grit sandpaper
I would level that head for sure because if you mount it and the leak is still there then you'll have twice the work.
Its called a Bumble Bee as far as color and stripes, or thats what we called it back in the day.
Roll with it and see what happens!
Definitely take the head to a machine shop to get it resurfaced.
Send it to the machine shop for sure. That might screw you 6 ways till Sunday if you don’t.
I also think everybody who has commented in this video should get a free tshirt and sweeter from your merch
My all time favorite atv right there
Had one cone in a few weeks ago, guy said its using oil. So he added some fresh heavier oil to it. He put full container of engine restorer and hlf qt of 80w 90 gear lube in it. It ran, but my god did it do some damage. Still waiting for parts, he said do whatever we need to do to fix it. Had to have all new piston, ring, crank, etc.
If you use a flat peace of glass you can glue down some sheets of sand paper and deck sand that head. The glass is flat and its about as straight as you can get so you can get that imperfections out. Just finish sand smooth
Looks like the water pump shaft has some play in it
Get your cylinder head resurfaced, it’s a better idea than running it like that. I have a 04 yz250f that I rebuilt for cheap and it had a divot in the head so I got it resurfaced for $150
send that head to millinium technologies near waldo wisconsin. they do awesome work!!!!!!!!!!!!
Get it fixed be a mint quad when done
2V: look at how much oil was in it ...... Me: you and I have different opinions on what is considered oil
Yall get it going no doubt
Get it repaired can never be too careful
To check a head gasket leaking in the coolant system couldn't you just apply 25 lb of pressure to cylinder and see if it leaks through radiator
Yes that is a goo idea! I will try that next video!
By the looks of that head it has never been milled let alone cleaned. Planing/resurfacing/decking a head using a flat surface with fine grit sandpaper is always a must when there are deformities present. Make sure to check what compression ratio the current aftermarket piston.. that will give you an idea what your squish is going to be after you resurface the head. Also it would be wise to check the surface of the old cylinder as well. That will tell you how long the problem has existed. The number one talent that a good mechanic must have is the ability to diagnose an issue... you my friend are second to none! Now all you need are the right tricks and tools up your sleeve to resolve these issues. I've followed you now for a few years and your progress has astounded me! Keep up the great work!
I would definitely get it fixed or replaced.
Pull out the locating pin. Find a flat/level surface 800 to 1000 grit sand paper wet it down and resurface it your self and send it . It don't look too deep .
You could use liquid high temp gasket maker with the head gasket and just use a small amount all around
Fix the head for sure.
Change that base gasket, trust me don't chance it bud! Head needs a machining, or a good cleaning and leveling out.
These videos never get old lol
Not just the seal bad will make it leak out of the weep hole, if the shaft is worn it will make it leak too
Yeah that's another thing. Sequence and torque specs are a must. I can't work with my brother and his friend cause they never torques shit. They offer to help me in my shop and I pissed them off cause I told them no. My name is on that and don't want a lawsuit. I mean fallow torque specs you should never worry
its really nice JOE
Hey joe ! Dont forget cam bolt heli coil too . Dont know if a second hand head is an option ? the other ones you have off other 450 were junk wasnt they ? Id maybe get it mildly cut /surfaced ? and heli coil . Nice looking bike it will be tho . Turning in to a yamaha quad shop hehe ! All the best :-)
That's prolly the original oil from the factory lmao
If you have any thick glass glue sand paper to it and do figure 8s couple of times on 600 sand paper and it's be brand new
Can't wait to watch now
34:08 will come back to haunt him in a year from when this was video was posted.
Keep up the content. Fix the 500 with the wobble another speed test
Oil mod check for the oil mod! Good thing you ran it before dumping more oil in that would have been a waist. Lol
Send the head to be milled , out have it off I've never had a milled head and gasket fail ! I've had heads that didn't get milled fail .
Without a doubt esp since thats a problem area already
Awesome as always
Isn't that rubber/plastic cover the one that goes over carbs and under fuel tank? Not the skid plate for axle?
Butterscotch oil, tasty.
I don't see how ppl let this shit happen. I mean 3000 sitting there!!. Well was!
I'd get that head decked if I were you. At least JB weld the corroded spots and resurface the head on a deck plate.
loose Bolts so there its the reason at oil and water have mixed,but i still would take the parts in machinest to the surface cleaning and take out thats much at all imperfections are gone because its can still blow casket.
JOE GOT HOSED AGAIN !!!!!!!
deck the head. an raise the cylinder with 1 additional gasket, just like they did with the quadzilla motor
by the look of the top of the piston also a sign of head gasket leaking, also you need a new bolt and possibly a tap? also i feel like that spot will leak eventually