Repair of damaged cylinder head - loose valve guide

Repair of motocross motorcycle Suzuki RM-Z 450cc
. . . for more interesting videos click ,, HERE "
/ @paulxchannel

[@GWAYGWAY1]

Why not just make an oversize guide for the new head size hole? Steel expands less than alloy alluminium it will loosen.

[@classicbritishspares]

💯 I get this a lot on old vintage British bikes. I usually hone out the valve guide bore with a Sunnen Honall, then make an oversized bronze guide. If the press ain’t right, it will spin. I’m curious to know how much press is on the sleeve in the head as well as the guide. Heat transfer may be effected as well… creative fix however

[@MichaelRoloff-yr7iq]

Immer wieder spektakulär, wie Paul hier Präzision und Kreativität zusammenspielen lässt! Chapeau! Wie immer, Super gemacht und wunderbar anzusehen…!👍😍

[@firmajambi1824]

I

[@markaddy53]

fantastic engineering skills great job well done

[@EnduroValeaJiului]

RMZ450 heads are prone to failure :) nice work !!!

[@andreburgman2107]

exactly as we are very used to do in Brazil, not only with these housings but also with valve tappets. Awesome job!

[@leedale4008]

Another fantastic repair 👏👏

[@aleksandrshubin842]

Afternoon, I always watch your videos with interest, great work. question - why did you make the bushing iron ? because of the different thermal expansions this repair does not look reliable. maybe an aluminum bushing would be a better solution ?

[@Ivanesquevan]

I miss this Bro!. Regards from patagónia Argentina.

[@ragnarironspear1791]

You do do beautiful work 👏🏻👏🏻👏🏻👏🏻

[@mathiasnewton.m1865]

incroyable travail, bravo j'adore vos vidéos avec toujours des techniques souvent très malines

[@reza090282]

Wooow...I never thought you would do that..... your brain is out of the box bro.... hahaha.... very creative

[@mxcollin95]

Awesome work sir…well done! 👍

[@bradwilliams5242]

Attention to detail that’s it the perfect example

[@ДмитрийГородец-н9м]

молодец, добро пожаловать в Россию

[@zippy350]

Cam shaft journals look rough as !

[@kamto-xv4sg]

Why aren't the valve bushings all ported polished like the previous factory defaults?

[@yorkshirebiker1293]

love the animation of the commando head

[@YouCantSawSawdust]

Never hold a micrometer close to, or at, the anvil or spindle ends. Always hold the instrument at the outer curve of the frame, preferably on the plastic pads, if fitted.

[@nobsh79]

あなたの技術は新しいヘッドの価格　価値　を超えている😂

[@СергейКомрад-ш2о]

Мне кажется распредвалы и пастели головки тоже требуют ремонта

[@draganplavsic5743]

everything can be fixed

[@nakawalna]

Как обычно, всё просто. Чётко

[@jorgevillaelx7723]

Hola..como puedo contactar con usted ?..saludos..para reparacion de head cylinder bmw r100gs...

[@stephanelanglois6140]

good job 👌👌

[@UA3USY]

очень крутой способ ремонта.

[@Anthony59400]

Beau travail de sauvetage 👌

[@pleiadesalcion7128]

Good job 🤜🤛

[@gleidsonfernandes7881]

Perfeito. Trabalho incrível 😮. Forte abraço aqui do Brasil. 🇧🇷😎

[@giuseppegalione1388]

Maestro!👍

[@Klyuch_Na_13]

Направляющую одним телом, большего диаметра сделал и забыл.

[@joaoc_PT]

better than new

[@maximzalessky227]

Awesome job 👍

[@christhalassinos5574]

You are the best!!!!

[@orlandomatosjunior5807]

Serviço de qualidade

[@ronimard]

Kalo ada yang susah ngapain yang mudah...yang penting cuan

[@bobellisp5]

Cool !! your back...

[@eduardopatriciolentz5220]

E a trava?

[@jasinespinoza1026]

can you fix my rmz250 head?

[@rezaferdinan3922]

I hope u in Indonesia

[@andwjy]

Wait, one seat is berry and the others are stainless? 😮

[@zdenekkusala8141]

Thank you for repairing ✌🏼🫡.

[@team5xray596]

Muy buen trabajo

[@CoralReefkid]

Hi Paul, I’m currently rebuilding a 2005 Crf250r. I had a valve drop at full throttle, yet unbelievably the head and cylinder survived and all I need to do now is replace a bad left exhaust valve guide. My question to you is: am I doing anything wrong by running just one brass valve guide? The others are in perfect condition but I do not believe they are brass. Should it be all the same material for better heat distribution or something else I’m unaware of? Thanks

[@PaulXchannel]

kzbin.info/www/bejne/o6CrlqqrqtWjd80

[@bartosz.nejman9644]

Good job 💪

[@zardportugal]

Beautiful.

[@borkosestic2055]

Good job

[@ivanc251]

Spettacolo !

[@kharirizainal9382]

hello bro..do u have engine rmz250 ? i need to buy if u guys have the engine..im from malaysia..

[@iraniltonalencar-gj9ir]

Top top

[@alvarorios5474]

👍

[@bigbelconut]

Just make an oversized guide.

[@jasinespinoza1026]

w can i dm you?

[@iurii-wind]

😂😂😂😂 сюрприз. Мастер молодец. 🤝👌👍🇷🇺 Браво 👏👏👏👏👏👏

[@arrisuhandriyanto8947]

💖

[@TheGitararullez]

This head was probably repaired as a joke. After all, she is blurred. Camshafts too 😆

[@PaulXchannel]

kzbin.info/www/bejne/jJfPgaaBqMmshLM

[@AC-uq5rh]

Самое слабое место kawasaki и suzuki

[@anonymously241]

Copper valve guide? 🦮 🤨

[@nazoe83]

*always nice.. 👏*

[@BMW1989Roman]

Почему на холодную ставили она снова вылетит

[@icoworks]

Toto by som aj ja potreboval spraviť 😂, inak super

[@frontlinemedia4270]

Interesting. Why not make a threaded sleeve to screw into the head? Which has oem inside dimensions for the guide.

[@loopeyshooter503]

Why not enjoy a different point of view?

[@frontlinemedia4270]

@@loopeyshooter503 because I was an engineer major and I want things fixed, not bandaid

[@victorvolcovschi2135]

Top video 👌👌👍👍👍👍👍

[@c__TattinhNhi]

The techniques are quite amazing😊,👍

[@patrickbussius]

Super Präzisions Arbeit. Hut ab Paul 🎉🎉

[@rjung_ch]

Nice repair, thanks! 👍💪✌

[@arsyakhanaufalraditto2493]

good job😊

[@kawasakirule3707]

Go back to Old School 2 Stroke all the way. 😅😅😅😅