Ktm sx-f 450 - repair of damaged cylinder head.

[@truckfixerme]

Should be made with replaceable bearing inserts from the factory. Awesome repair on the head.

[@ZygmuntKiliszewski]

Spectacular high - precision reconstruction based on excellent cutting machines. Also when using simple tools, which proves professionalism! Congratulations :).

[@PaulXchannel]

Thanks

[@ВаясКовач]

how much does it coet ot make something

[@gulag_dt]

These videos make me happy that I own a 2stroke

[@DisruptiveUnicorn98k]

What pisses me off about most people is that when I say that a head can be fixed they tune me their bull ,and here this guy is doing what I've been trying to do for years if they just would alow me to show that a blown head can be fixed ,thx mate who ever you are

[@PaulXchannel]

In the end, it is possible :)

[@DisruptiveUnicorn98k]

@@PaulXchannel that's what I said ... And I will

[@PaulXchannel]

Good luck at work.

[@chrisstephens6673]

It is amazing what you can do if you believe you can. My customers call me a wizard because i do what they didn't think possible. It not my knowledge that is great it is their's that is lacking. It all works out fine, i get the mental exercise working out how to do it and they get a repair.😊

[@DisruptiveUnicorn98k]

@@chrisstephens6673 I bought a second hand head I posted the vid on KZbin yz250f knock or something , the guy would not allow me to buy the head from him unless he rebuild my motor so I saw no other way out and allowed it ,so when I popped the cams , the head was seized I barely did 5 hours on it , so the guy went and popped my cams and cam caps onto a blown head and mean I'm pissed , but the problem is you can't find people around here that is willing to do such jobs , because it's labour and time unless it's their own

[@herryyulianto1829]

That the slide metal bearing should be made, oil gutter on it. Same problem here on my honda, a factory failure design. Thanks for the video it's so inspiring.

[@PaulXchannel]

Ok

[@johncrowley5612]

Watch the video from 5:10- an internal grooving tool is being used to cut an oil groove in the bearing.

[@Markjtf]

another reason to love my 2 strokes even more

[@barneyjakobk726]

Thanks specially the last part of the video when you compared the running engines ...A++++

[@PaulXchannel]

Ok

[@shibinshiji4671]

I love that torque adjustable wrench

[@PaulXchannel]

He is good.

[@charliepapa5835]

Awesome!! Wish I had a machine shop here in nj that could do that kind of work....props!!

[@dannycoultas265]

Skill level is out of this world man have scrapped heads in better nick, hard to find this sort of guy that CAN mankind is loosing this sort of we can repair anything mindset, absolutely beautiful engineering, where are you at

[@PaulXchannel]

Thanks

[@andrewwilson8317]

Oil pump failure? Guessing the bottom end ain't going to be any prettier? See similar every day but on aero engines. You made nice job of it.

[@PaulXchannel]

Thanks.

[@moekakke]

This dude has all the shit i keep asking for X-mas !!

[@mariusfauru]

😅🤣😂

[@cesaomotos164]

Ferramental apropriado conhecimento técnico ficou um excelente trabalho .

[@PaulXchannel]

Thanks.

[@groomlake51]

The back side of the intake profile is insane. I have been around automotive race engines my whole life and have never seen a lob profile like that

[@mobgma]

many do not clean the 2 or 3 filters in the engines or even pull them for that matter. they get clogged and voila. or the oil pump.

[@PaulXchannel]

Oil pumps

[@Panellll]

Flashbacks of rebuilding my subaru ej25 lol. Heads look similar

[@johnthomas6614]

Awsome job. I have built/fixed alot of motors/race mtrs mostly bikes/atvs I really like 2 see smeone that no's how 2 do that type of in depth mechanical work. 🛠 wrench on

[@PaulXchannel]

Thanks

[@BondanHeru]

Moped 150 on my country had same bad design like that. Some small garage mods changed sitting into bearing, and change rocker arm into roller rocker arm

[@nepicness]

Was there a permanent fix to the oil migration in those years? I don't think the other engine designs had any of these problems.

[@davidcort2857]

You are a genius Sir.

[@FloridaBikeSupplyOnline]

@6:20 I blew at my phone to get the metal shavings off 🤣🤣🙈 This is some HD!! 🤯 Amazing video. Keep up the great work! 🫡

[@eddiewennberg6]

4 strokes cool and fun when they work. only pain if they brake. 30 min piston swap on 2 stoke 2 days 4 stroke.. to much pain in the ass.

[@jonabeprezzi]

Very good your work. Keep posting videos. Greetings from Brazil.

[@skm_hadi_channel]

must be very difficult to find spare parts in Indonesia. the process of fixing it is also a bit complicated. because all that is worn has to be lathe again. installation is also very thorough, good job. Me from indonesia

[@PaulXchannel]

Thanks

[@ramontrinidadarrietagonzal6841]

Excelent work, but i think the bronze SAE 64 is better than aluminum for the cmashaft, for the hardness and friction coeficient, maybe the nodular iron 5506 because it contains nudules of grafito and it is a lubricant Sorry for my english

[@PaulXchannel]

Thanks. Cylinder head is from aluminium alloy - for camshaft good from factory. My aluminium is better. I use his on making high compression pistons. It work well.

[@matteogiussani2462]

The camshaft bearing's?? Didn't you change?

[@PaulXchannel]

They were fine.

[@moronanticriss]

Bike for sale, Engine freshly rebuilded, Start great. Forget to say, ...Just dont rev it too much.

[@mariusfauru]

🤣🤣🤣 same 💩 i was thinking 😂😂😂

[@Bryan-Hensley]

Awesome work, but 2 things. You could have use a press in dowel pin and a counter sunk hole drilled in the bushing. Second thing, why don't you use bronze? If there's ever a disruption in oil pressure the cams or the will not be damaged because bronze can run without oil for a while

[@PaulXchannel]

When I have the screw I can mill a hole - it is strongly. Bronze is a problem - different thermal expansion from the aluminum head.

[@purprea]

Très belle réalisation de fraisage/ tournage, mais franchement le coup du papier émérie.sur le plan de joint de culasse, c'est dégueulasse.....un léger surfaçage aurait été préférable.....mais bravo quand même......belle réparation

[@jasonlogan1720]

How do I send you a head that needs the same repair. Would you do that?? Same head for same bike

[@marleynjie4538]

Me too!?

[@markcortis2348]

Some people are so clever,👍👍

[@rudianto7170]

terimakasih kawan, kau telah membuka pikiran saya yang tadinya tidak tau menjadi tau

[@damianchytutos9334]

Awesome work and beautiful bike!!!! Congratulations!!!!

[@tonyalto1014]

Have you ever tried cracking your bearing sleeves on an expanding mandrel as they commonly do on rods for marine engines? Just curious. I did it one time and had to finish line home the journals for the clearance I was shooting for. Next time I will finish note closer to size. I left quite a bit to take out not knowing if deformation may have been as issue. I held the inserts with pins. Used stud and bearing mount to glue them in place with shims on the cam journals for preload while clamping up. Turned out very nicely. Older Honda trail bike.

[@PaulXchannel]

🧠👍

[@stevenm6489]

Ktm Know The Mechanic

[@acuario8331]

ECXELENTE, trabajo de nivel profesional. Saludos desde Ecuador

[@Homeless1986]

Amazing!!! That's what I was looking for!!! Thank you.

[@artembritov7381]

Не верится, что оно будет ездить с этими отверстиями под болты во вкладышах, но выглядит красиво

[@PaulXchannel]

Thanks. The holes aren't problem. Don't worry - it work well.

[@antoniofedrick7051]

How much do you charge

[@chrisstephens6673]

Knowing your standard of work , i don't even have ask if you cleaned all the oil feeds after the pump failure. 👍

[@PaulXchannel]

of course

[@timh6977]

Great job once again!! I noticed there is no keyway on the cams. Would there be any benefit in advancing the inlet cam? Or has KTM already optimised that?

[@fw1421]

How much did the machine shop service cost? Had to be close to what the new head would cost. Beautiful work!

[@PaulXchannel]

Thanks. Half price.

[@fw1421]

Paul X thanks for the response.👍🏻

[@loganpenland6568]

Paul how did the id of the bearing races stay proper when you slit it with that saw you removed part of the circle cant wrap my head around how its still round not oval once the cam tower is mated back? just curious.

[@loganpenland6568]

nevermind i see how you did it! you cut it off center

[@antoniolaradimas379]

Excelente trabajo !100%artesanal

[@peterpedant]

I think I might try this on my 450 exc. Can I just use hand drills and a dremmel for all the milling stuff?

[@marindedonpingue7840]

Man! I love your work! 💯👍

[@PaulXchannel]

Thanks for watching

[@wilsoncamilodasilva516]

Trocou a bomba de oleo ?? Senao pode perdê.o serviço

[@gibamec7636]

Perfect! Grand job, master!

[@PaulXchannel]

Thanks

[@copisetic1104]

Some one should make bearing inserts for these, quick and much easier.

[@mialmagama]

Muy buen yrabajo .profecional 👍👍👍👏👏👏un hran saludo desde chile

[@PaulXchannel]

Thanks

[@stenyang2007]

OMG,Even without bearings!

[@sulimanmohd5968]

Hi I have the same situation in the video I need to fix my head how to contact with you my ride Suzuki ltr450

[@santanikx9]

what year is that sxf , looks sick !

[@denniskuik1610]

Ktm sxf 450(?) 2008-2010

[@DmenDuroRider]

How much does that repair cost labor wise? Cheaper than a new head?

[@iixessaxii1659]

I have a question, please. What is the clearance in the camshaft for the exhaust? When I make the clearance 20, the valve becomes more open and does not start.

[@PaulXchannel]

0.20mm is ok

[@georgesnasr7227]

Awesome job , well done.

[@didit546]

Hi im from Indonesia. Here we use ball bearing for camshaft instead of 'slide bearing' 😉

[@PaulXchannel]

No1.

[@jameshawkins3484]

Slide bearing makes me laugh, shell bearing its called.

[@michaelmathews295]

How do you adjust the valve clearance?

[@cesarfabricioordonezanazco7034]

Excelente muy buen trabajo

[@danielnorman593]

What aluminum stock did you use and what did you boar the head to and what was your ID and OD on your bearing if you don’t mind me asking

[@FabioSilva-vs6ry]

boa tarde eu tenho uma sx-f 450 2008 e ultimamente sempre que paro no fim de uma trilha o motor desliga sabe me indicar de onde possa estar o problema ? motor trabalha bem e levou filtro de ar novo e vela nova e continua igual sou dos açores e não temos oficinas nesta ilha para motos , se poder dar uma dica agradecia muito obrigado .

[@ВаясКовач]

how much does it cost to make something

[@Greece-DIY]

Respect. Πολύ καλή δουλειά

[@PaulXchannel]

Thanks.

[@wedgecharger]

Are there no cam bearing shells in this engine?

[@PaulXchannel]

no

[@christidmas3995]

No.Mostly not.Even in cars.

[@chrisstephens6673]

If i remember Honda motorcycles from at least as far back as the early 70's ran their cams directly in the head with no replaceable bearing. And suffered because of it.😉

[@johncrowley5612]

@@chrisstephens6673 They only suffered when regular oil and filter changes were neglected or if stiffer valve springs were used in conjunction with a more radical camshaft.

[@chrisstephens6673]

@@johncrowley5612 not so, we had several bikes in that suffered and they were perfectly standard and regularly maintained, mainly twins i seem to recall 250's but it was over 40 years ago.

[@markomilosevic3376]

Did you judt put old bearings on new camshaft???

[@PaulXchannel]

They aren't old.

[@kadekwidhi1869]

You is the best. . Saya indonesia 🔴⚪

[@PaulXchannel]

Thanks

[@maurisurfer81]

how much have u payd for the modifications, I mean resurfacing the camshaft seats and the homade sliding bearings. If it last great reparation…..

[@Bryan-Hensley]

Have them made from bronze. Then you'll never have this failure again. Also use press in dowel pins instead of screws. Those screws could come lose because lock tight gets soft around 200 degrees..

[@keystonerider1308]

What year is this engine? I never knew ktm had a twin cam 450. 450 has been a sohc for many years now.

[@PaulXchannel]

This model 2007-2011

[@blakeguski9794]

Do you offer this service?

[@eduardopinto8605]

Paul esses banlançeiros deveria ser rolamentados tantos os comando de válvulas nao consigo entender esses engenheiros mecânicos projetitas..

[@davidstafford2780]

Would like to know how to get a hold of you have stuff that I need done.

[@ciars11]

2 stroke gang

[@Metermainou]

Its 4-stroke

[@mx118racer]

If only they made white metal bearing caps like most car crank shafts . Could replace them easy and linish the cams . I see this failure often . The last bike I purchased with very similar issue the cam caps were crazy tight . Maybe 30-40nm !

[@prmajiq]

we use welding method. like original part at end

[@pabloricardodetarragon2649]

I hate a brand which does not care about the lubrication of the cylinder head. All the damage is coming insufficient pressure oil for an aluminium bearing. And bad surface treatment of the steel of the rockers.

[@lukeanderson5781]

It probably ran out of oil and took out all the plain bearings first. Roller/ball bearing crank doesn't need much oil.

[@pabloricardodetarragon2649]

@@lukeanderson5781 I'm afraid It's a bit more subtle than that. Ball and roller bearings do not need high pressure oil. The aluminium plain bearings yes so the oil pump has to be big enough to give a pressure somewhere the 2.5 to 5.5 kg/cm2 at the head whatever the RPM, even the lowest ones. The dirt bikes spend a lot of time at low RPM, or with big variations of RPM. If the oil pump is a bit too small the plain bearings will first suffer at low RPM wearing at high rate, that''s probably the problem of the KTM when you see the size of the pump. The problem is recurrent on various KTM models. Morality: or you put the camshaft on ball bearings so there are no plain bearings in the engine (the best solution but sometimes complicated) and the oil pump has for main purpose the cooling of the internal parts like the head and the piston. Or you put a beefy pump giving enough pressure at idle even with a low oil level or a dirty filter.

[@SunilSundar]

What grade of aluminum did you use?

[@PaulXchannel]

AlMgSi0.5

[@philbaker29]

Not quite sure what "high performance aluminum" is, but I doubt it gave this engine more HP 🙄

[@PaulXchannel]

This is thought to mean that this aluminum will last a long time. I use it to make pistons for RC engines that spin over 30,000 rpm

[@gustavowalser5024]

Greetings from Argentina!!. Excelente work.!!. You can know what material you use to make the slide bearing?. Thank you.

[@PaulXchannel]

Thanks. AlMgSi0.5

[@andreibredurean9763]

Hi paul , i have an motocross ktm 450 sxf 2008 ,you can tell me about position of distribution thanks you!

[@PaulXchannel]

The camshafts timing?

[@andreibredurean9763]

@@PaulXchannel timing drive

[@andreibredurean9763]

Balancer gear and double gear w.cpl

[@PaulXchannel]

From right side on cover is inbus screw. (at the pump) Remove the screw. Then you will see the position. And set the position of balanser.

[@andreibredurean9763]

@@PaulXchannel i hope it help me i'll be back a message thanks you ! I from romania ...😁

[@szymonkupka852]

Brawo brawo 👍👍👍

[@PaulXchannel]

Thanks

[@RGTravelAdventure]

Good video 👍👍👍👍👍

[@time_on_target]

Can you give more information? How many hours were on the bike? You mention oil starvation as the cause but what kind of maintenance was done on this bike? 5-10 hour oil changes? 10-15 hour oil changes? Thanks

[@PaulXchannel]

I don't have detail information.

[@alessiopaganelli]

Bel lavoro, complimenti!

[@PaulXchannel]

Grazie

[@jefffowlerr]

Love my 2 smoker

[@billadmond9450]

I wonder what caused that damage, was lack of lubrication, overheating or a bad designed project?

[@PaulXchannel]

Hi damaged pumps.

[@billadmond9450]

@@PaulXchannel Thanks for replay and very good clean and professional repair. I think that on all 4 stroke bikes there must be the oil temperature sensor.

[@PaulXchannel]

@@billadmond9450 That would have been good.

[@mx118racer]

And often people that dont torque the cam caps down correct ( usually over torqued )

[@farshidzr]

Perfect 👍

[@jaimearaque7449]

Awesome work!!! 👏🏽👏🏽👏🏽

[@scottruda2933]

My 505 has the same issue. Will you machine heads if they are sent to you?

[@CatLanner]

@@PaulXchannel I have a Beta 430 4 stroke with the same problem. I don't know why this happened - the oil pump is working and tested, the engine oil filter was without any dirt, the oil pump gears are not broken. Got the bike and rode it just 10 hours. Changed the oil with fuchs 10w60 full synthethic and I have had the same bike and rode it with the same oil so I don't think it is oil related. My scoring is not as much, but still. What could have caused this problem, because I don't want to repair it and the same thing to happen.

[@PaulXchannel]

@@CatLanner Hi . Low oil pressure ?! The oil must be injected within 10 seconds on the camshafts. The screws of camshaft holders very strongly tightened ?! Standard - 12-14 Nm Cheap filter ? Big problem !!! Recent 2 repairs - cheap filter. It is little permeable, or is soft and pulls it in.

[@CatLanner]

@@PaulXchannel Are you talking about cheap oil filter? I use hiflo Hf631 which I think is good quality. This couldn't have happened from the fuchs 10w60 oil right? No chances?

[@PaulXchannel]

@@CatLanner Hiflo is good. I use Motul 7100 is best of.

[@CatLanner]

@@PaulXchannel what I mean is that for 10 hours with fuchs 10w60 it shouldn't be possible to damage cylinder head?

[@zappa916]

i admire the skill but theres something different about screwing in bearing shells. I would have a go at building up the bores with tig then fitting original bearings.

[@PaulXchannel]

It is necessary to experiment 👍

[@jayb2617]

hope you washed out that bearing before using

[@PaulXchannel]

Why such a basic question?

[@michaelantunez5045]

Is this something you would do again if I pay I have a 08 ktm 505 SX-F I would love to have this done to do you have a shop or something like that to were I can contact your business thanks in advance awesome work also

[@PaulXchannel]

Thanks but I do not provide this service publicly

[@kristijanlekic4634]

Dude can you help me, i have kx250f 2005 and i heard that bike is a full of a shit in head, and if i buy head 2007 model i dont have a problem with valve, is that True?

[@PaulXchannel]

Hi. Sorry, I don't know the differences.

[@vladturaev9905]

Good equipment, but don't better the couple of slide.

[@johannienel1]

Did you do a squash test on the new bearings?

[@andrewwilson8317]

Johan Stephan Nel you mean the clearance check with plasigauge or thin soft solder wire?

[@johannienel1]

Andrew Wilson , yes with the plastigauge. 🙂

[@eduardoguillen7033]

Que buen trabajo de tapa o culata

[@carpetmantis]

Can I use this video on my channel?

[@PaulXchannel]

Ok

[@carpetmantis]

@@PaulXchannel thanks

[@llewvirtue861]

Why did it happen in the first place

[@PaulXchannel]

Oil pumps K.O.

[@NduroPhill]

Hey Paul X! I have the exact Problem with my Beta RR400 Head! It is currently out of stock worldwide, and no company I contacted can repair it! Can you help me out? THX!

[@HugoMNF]

Nice job

[@tomcumby1118]

What does this procedure cost?