Modification and replacement of the beryllium valve seat - Honda CRF 250

[@رسولالناجيالموسوي]

انا ميكانيكي دراجات نارية وشاهدت الكثير من عمليات إصلاح الأجزاء التالفه لاكن هذا الفيديو اذهلني فعلا انه اكثر من رائع تحياتي لك من العراق

[@jeffreymoore7729]

By far the best machining videos I've ever seen the way he lays it out in sequence and displays the tools needed for the job absolutely epic and I'm jealous of all the machining tools I wish I had that in my garage.. THANKS PAUL X

[@mxcollin95]

100% AGREED!!! Paul X is an awesome mechanic with awesome tools! Too bad he doesn’t live in the U.S. (Do you Paul?) I definitely have a few dirtbike repairs and modifications that would be awesome to get his help with and insights on. You don’t find this kind of talent at your local dirtbike repair shop.

[@redmountains6516]

I 've watched it twice and it's just insanely cool. You're a great fellow. I am writing through a translator if anything, I'm sorry, your subscriber from Russia is the city of Chelyabinsk Я смотрел его дважды, и это просто безумно круто. Ты отличный парень. Я пишу через переводчика, если что, извините, ваш подписчик из России - город Челябинск

[@KATEKNIK001]

I also often work on that stuff, my only job is using simple tools, not as sophisticated as yours mate. Your work is amazing mate

[@scottcarter4526]

This video blows my mind. I have a CRF250 head that needs the seats reconditioned. I have a Bridgeport mill and a South Bend lathe but I don't have the stones to even attempt a job like this. I am sure I would mess it up. Bravo!

[@4kays160]

Dont, beryllium is one of the worst cancer agents known to man, get rid of any bike that has it, dont touch it dont work with it, the guy in this video is going terminal very soon, im a metal refiner and i dont fck with beryllium ever, that entire shop is now contaminated even the children he went home to... google beryllium affects, hes dying soon sadly

[@gerry343]

A beautiful job, as always! Your workshop is like a surgical operating theatre- so clean. I appreciate the style of your videos, we can see clearly what you are doing without an unnecessary commentary or any annoying music.

[@PaulXchannel]

Thanks

[@biker-dr1ne]

I enjoyed both the machine tool use and the artistry using the rotary tool to dress the damage. Outstanding skills

[@Bill_CBR]

Wow, that was mesmerizing to watch the process. Clearly a knowledgeable and talented organization.

[@bobbyblenio4571]

Awesome video,I’m a 2 stroke guy & I Just bought a New 4 stroke…I know Some stuff about 4 strokes but This is New to me…that’s a Lot of Work but You made it look Easy🏆

[@mrsockyman]

I live that the valve driver guide is an old drill bit! Brilliant recycling!

[@janlundquist3132]

and a wobbling one

[@patrickwatters7555]

I'm impressed with the removal of the gashes in the head. If it was mine I'd be very pleased.

[@ramiretz]

Traumhaft schön immer wieder deine arbeiten und Videos.... so detailreich und entspannend zum kuken !!! love it !

[@Sketch1994]

Never cut Beryllium dry at all if there's a way to wet it and worst case scenario, hook up a vacuum cleaner on the flanges of the head to suck any dust coming out with the chips.

[@PaulXchannel]

👍

[@kurtnet]

satisfying to watch...that kind of tools to repair the damage..is amazing...keep it up 👍

[@ngt84]

18:31 Repaired valve seat is standing about a millimeter above the original valve. With different seat angles

[@PaulXchannel]

The other three seats are very low - they are also waiting to be replaced.

[@akira5952]

amazing how people have this very special tools always at home...

[@ajuste4369]

PAUL X toujours passionnant et............."instructif"!

[@chrisgriffin3374]

Very nice job🤘 Just curious about installed height and such. Would've been nice to see complete job because overhead cam clearance etc. Nice machine!

[@kucigal8993]

😲😲😲 monster!!! - kzbin.info/www/bejne/aammfaV9fduAmJo

[@207.jimmy_t]

Please look Newen contour-machines on YT

[@207.jimmy_t]

Just measure the not damaged valve stem and make same height with the repaired one

[@TravisFabel]

I enjoyed this... Even though I'm a two-stroke guy and I don't like any of those "valve" parts. :P

[@RANGOArts]

2 strokes suck

[@daddy5225]

You're 2-stroke wouldn't be up to much without the exhaust 'power valve' parts 😉😂

[@TravisFabel]

@@daddy5225 actually my CR500 doesn't have a power valve. Those are optional. There are plenty of two strokes that use a reed valve but it's a completely passive device. What I posted is called a tongue in cheek comment. It's a joke that the original poster seemed to completely understand. Primarily because he was working on the top end of a four-stroke, specifically the valves while none of those parts exist on two stroke bikes.

[@weareallbeingwatched4602]

Seats

[@c__TattinhNhi]

Valve mouth it is fed three angles 60 45 30 degrees, ???

[@South_0f_Heaven_]

I like the intake valves being pushed on with his fingers cause it failed the vacuum check the first time lol. 45 degree seat angles are cut way too wide as well hence the reason why the intake valves failed the vacuum check. Thin seat angle = best seal and flow. Other then that overall good job doing the oversize valve seat.

[@thedownhillerboy]

Amazing work done there👌,really satisfying to see all that perfection and exactness of all your processes and machine work,makes me somewhat envious for real...I have the same 2007 Honda CRF250R 4-stroke which also made me enjoy the video a great deal! About a year ago my bike had to have both exhaust valves replaced since the bike was starting only after being pushed and even then it was misfiring while in idle ending up turning off sooner or later. An experienced friend looked into it and detected the issue,I then ordered the 2x exhaust valves,2x seals and new gaskets. It solved the issue,it starts and runs🙂,but it makes a slight rev cut when cold which fades a way once it takes off. My friend said for me to order a new replacing kit for the carburator which I did and I've been waiting on my friend to have a chance to mount the kit up...Do you think the new replacing kit for the carburator with new needle,o-rings,jets, valve and a couple of other brass parts will solve this issue🤔? Thank you in advance,my best regards to you all the way from PortugaL🇵🇹.

[@ABS-yc8vh]

This is really so cool. Wish I had all the tools and knowledge to do it myself :)

[@mohammad45h]

Hello 👋 you are berelians باشکوه وبینظیر ممنونم وهزاران هزار 👍 👍 👍.........تشکر جناب مهندس عزیز....🙏🙏🙏🙏👌👌👌👌👌

[@ZygmuntKiliszewski]

Professional tools and their correct use resulted in the repair of valve seats. It was nice to watch it, congratulations 👌.

[@ZygmuntKiliszewski]

Thank you 😀.

[@drpacman9996]

That’s some mighty fine engineering right there 👍

[@firstielasty1162]

Just by eye, the exhaust valve with the non-replaced seat appears to be more recessed into the head than the one with the new seat. How different in thickness were the shims needed for them? Maybe it was an illusion, but I thought they must be pretty different if visible. Neat seat cutter, I never saw one like that!

[@PaulXchannel]

kzbin.info/www/bejne/j5C1eYF4pq51r9k

[@nguyenvuhoanglong3418]

Beautiful work ! So many thank for your sharing knowledge !

[@liamhotspur9182]

Great! Interesting how tight the valves are just by using those drilling tools. I expected the need to use a grinding paste...

[@arsyadmotorchanel]

very thorough and neat work supported by good tools

[@jackdanielsbmx]

This should be prescribed to people as an anti anxiety drug. Beautiful work!!!

[@dudiromi3949]

Keren, pengerjaannya sangat presisi dan ketelitian serta kerapihan tingkat tinggi

[@markcdeyoung3118]

Nice !! that's like a higher form recycling fun to watch and I just digg them fancy tools it's as clean as an operating room all up in there !! 😁👍

[@bbmoti]

As always, amazing job. Thank you.

[@alexcalderon1966]

Waoo...este trabajo está perfecto 👍🏼. Andas en otro nivel camarada, Saludos desde Guatemala 🇬🇹💪🏽✌🏼

[@Klyuch_Na_13]

Инструмент у тебя классный.👍

[@redmountains6516]

да это так и он сам делал этот стэнд для ремонта и в ленте есть подробные видео как и что он делал

[@alro2434]

Thank you very much. The machine work, OK. Your HPR Valve Cutting Machine is magnificent !

[@DiscoR53]

I had a co-worker do the same thing as this with his CRF 250 but he had the head ported and polished new seats all the way around. It had plenty of power, sadly the engine only lasted 3 races. The bottom end gave out spectacularly and destroyed the whole engine.

[@mianmuzammil7544]

Simply, some fine piece of art work. Amazing.

[@callumjai4226]

Did you fix the seats after that vacuum test?

[@rusmaster2588]

Good afternoon. Do you have a video on making a boring head?

[@Nmrk88rzn]

Подскажите пожайлуста, почему используют медные/бронзовые седла клапанов, а не стальные как в автомобиле?

[@Сем-й4х]

Нагрузка меньше ... Но бывают и стальные. (Тюнинг бошки когда делают).

[@redmountains6516]

сами седла дешевле чем клапана и тепла передача лучше у блонзы чем у метала и дают небольшую прибавку в лошадиных силах так как трения клапана о седло меньше чем по металу и бронза не обычная а специфичнаяс добаками типа как медна графитовые подшипники работают

[@ralphwarleggan3813]

Perfect video buddy!! Amazing! You are an artist!!

[@LuisFerreira-ud9rc]

Olá bom dia ,gostei muito dos teus vídeos Pará muito bom ,queria tirar uma dúvida ,tenho uma nx400 falcom ,ela tá vazando óleo pela junta do cabeçote ,esse óleo ele pode passar pra camera de combustão ,qual procedimento que devo fazer só que a moto não sai fumaça

[@Mj-bn]

فنان بمعن الكلمة 👌🏻👌🏻🫡

[@By_Da_Production]

cool valve opening tool is very useful brother 🙏👍

[@Silent_Keith]

"Valve seat damage!" That is an understatement.

[@Tech42420]

You are a very skilled machinist with excellent equipment. Thank you for this VERY informative video! Are you going to replace the valve guides?

[@mikebradley4245]

the guides are ok...

[@davidparker9676]

If the guides needed replacing, it must be done before cutting the valve seats. If the guides are replaced after cutting the seats, all of this work was for nothing and must be redone.

[@mrchispa1561]

Superb job! greetings from Argentina.

[@philipstreechon4523]

Workers in industries where beryllium is present may be exposed to beryllium by inhaling or contacting beryllium in the air or on surfaces. Inhaling or contacting beryllium can cause an immune response that results in an individual becoming sensitized to beryllium. Individuals with beryllium sensitization are at risk for developing a debilitating disease of the lungs called chronic beryllium disease (CBD) if they inhale airborne beryllium after becoming sensitized. Beryllium-exposed workers may also develop other adverse health effects such as acute beryllium disease, and lung cancer. See the Health Effects section in the preamble of the Beryllium Final Rule for more information.

[@cheerdiver]

I guess it could be worse, grinding it. But YA, cutting Beryllium copper is a health hazard. Please display the MSDS as a warning.

[@philipstreechon4523]

I had a good Frend who died from this. Berylliosis, or chronic beryllium disease (CBD), is a chronic allergic-type lung response and chronic lung disease caused by exposure to beryllium and its compounds, a form of beryllium poisoning. It is distinct from acute beryllium poisoning, which became rare following occupational exposure limits established around 1950.[1] Berylliosis is an occupational lung disease.

[@cheerdiver]

@@philipstreechon4523 Recently found Platinosis, and Osmium causing eyelids to become sandpaper!! Hekate may keep the plants at bay, yet technology can be tragic in it's own way.

[@its_meavegaming7824]

from malaysia support nice tool nice skill.. i hope my racing motorcycle head can be modified by you hahahah

[@josefnozkaCZTnv555]

... skvělá práce ( sehr gute Facharbeit )👏👏, pozdrav z Czech Republic 👍.

[@alimood401]

وكذلك التشيك عندهم إبداع وقمت الإبداع ❤❤

[@85CEKR]

I wonder why they use beryllium copper for the valve seats, I hope you know to use proper protection with that stuff, it's like one of the most toxic material there is to machine.

[@tonyus8197]

Much faster heat dissipation and the valves last longer. Agree on the high toxicity.

[@charlstheman7951]

That metal kills ppl??

[@85CEKR]

@@charlstheman7951if you weld it and breath in the fumes or just sand it and breath in the dust your pretty much guaranteed to get cancer, and like one time.

[@charlstheman7951]

@@85CEKR ok and what happens when heated in the engine head is there any harmful effect on it that may contaminate even more exhaust gases.

[@werewally3156]

@@charlstheman7951 beryllium is extremely toxic. You don't want to inhale the dust or get it in your mucous membranes. Im not too sure though, but i think alloying it with other metals reduces the risk.

[@eljoker1621]

Saludos amigo tengo una honda crf 250R que daño las valvulas y me gustaría saber si recibe piezas para hacer trabajos?

[@funsporty5377]

I love to watch this, but can we do it with simple tools?

[@jayminor9757]

Nice processes! As others have said, carefully with the beryllium.

[@Rectifjuillet1234]

Il faudrait rôder les ADD+ECH maintenant,car le Dépressiomètre N’est pas ok ? Il faut 6 barres ? En dépression ?

[@c__TattinhNhi]

and where did you buy the hole centering trees?

[@gus9272]

This is Paul X!!! AMAZING!!!

[@patrickbuildsalot5348]

Another very interesting vid. 🤙🏾 looking forward to more.

[@tamnguyen4874]

Bạn sử dụng kim loại gì để phục hồi động cơ ?

[@けい-q8p]

What kind of car is the made-in-Japan ex valve that comes out at the end?

[@m.g.s4526]

Nice job Man you're a professional

[@screwsnutsandbolts]

Great video 👍

[@georgenikolaou8506]

Excellent job!! How much does this job cost? Can i sent you my cylinder head for new beryllium?

[@tristanmargot3896]

Great vid, do you still lap valves with Beryllium Copper valve seats for new cylinder and valves from different manufacturers?

[@bagusiswanto7840]

Very nice job, awesome Nice machine from indonesia bro 🤘

[@tutulrahman9406]

VERY NICE, THANKS,

[@mxcollin95]

Did you get any feedback on how the motor ran after the head repair?

[@mikebradley4245]

amazing to see how something ruined is repaired

[@davehoward3645]

So you’re saying I can do this at home. Thanks

[@AC-uq5rh]

Отличный канал .Хорошо оснащёный мастер

[@ducaduke]

So I bought new valves for my old head the stock valves are intake SS and the exhaust are titanium. I check the spec of the valves seat and the valve guide both are good. So am I good to lap the intake valves and install

[@flyguyeddy]

Do you do vw heads as well

[@BlueSkyInt]

This is was you doing in your workshop or just information ?

[@cb400fhonda6]

First time Amazing hitech precison Nice job thers

[@geoscience2012]

I have a cnc mill and just got 2 bridgeport manual mills and wanted to get into head work for some local customers..but i am shocked to see that handheld tool you have cutting through the copper bereylium so easily.

[@alexlo7708]

Why does exhausted side not have copper valve seat ring like the intake?

[@michelhuaromo9351]

Exelente trabajo , felicitaciones , tu vas al grano con el problema y solucionarlo , trabajo de mucho nivel con las herramientas apropiadas , saludos desde peru , casma.

[@overdrive39]

I should hope you know this but be very careful with beryllium copper. It is very bad for you if you get a splinter or if you inhale the dust. It is a carcinogen at a high level. Just saying this for everyone watching. Great job on the head by the way.

[@PaulXchannel]

Well thank you. It's in the description.

[@Kosmonooit]

What was the fit of the seat into the head?

[@АлександрМарчук-н8ы]

Выпускные клапана открываются V образным коромыслом и выступание клапанов желательно выравнивать. Может это так кажется но на видио второе выпускное седло имеет большее проходное сечение...

[@redmountains6516]

да но это уже невозможно придется заменить тогда направляйки и оба седла клапана и потом уже доводить все плоскости в единый угол и скорей всего это другие деньги и клиент врятли согласится на глабальные такие переделки

[@АлександрМарчук-н8ы]

@@redmountains6516 Возможно, шлифовкой торца клапана можно подогнать оба клапана в нужный габарит.

[@Fleker8]

Nice work, looks like this work is more expensive than the head xD

[@SoloIdaho]

What does something like this generally cost to have done?

[@jagdishsharma3670]

Superb work. Perfect ,proper and precision .

[@nandasirisarathchandra9534]

Very,,, very,,, attractive work 👍👍👍👍👍

[@liamhoanzl2920]

0,1 mm of overlap ? i usaually us a overlap of 0,14-0,18mm / or is it bc if the copper seat ring- aluminium head ?

[@tabutabuu147]

What is the code of the beryllium material used here? What should we say in terms of hardness?

[@The123Smoke123]

AMAZING WORK!

[@abuilder135]

Just as a heads up, you are aware of the health risk of working with beryllium copper right?

[@tobpitbull]

No hand lapping to see witness marks from valve to valve seal?

[@PaulXchannel]

Titanium valves do not lapping.

[@tobpitbull]

@@PaulXchannel ok. I learned something and that is good. Thank you

[@prasit6]

What you use berylliuum 17200 or beryllium 17510 ??

[@patrickbrown7491]

Bulls eye spirit level is very handy!

[@blitzroehre1807]

Brilliant! I assume on copper beryllium seat no lapping required..

[@PaulXchannel]

Thanks. Titanium valves don't lapping.

[@smcsumo]

Professional job! Well done👏👏👏

[@juperrr]

I do not get one thing. At 00:13:16 you blow heat over the head which expands it and then you freeze the copper-berilium seat, which contracts the seat and then you hammer the seat in the valve head. Doesn't this defeat the purpose of creating a thight connection? I mean why heat the valve head to expand it?

[@plllot9713]

you do realize metal gets back to its original size after cooling or heating and bringing it back to the temperature?

[@TedTucholski]

Spectacular video Sir.

[@TedTucholski]

Paul, do you need special cutting tools for beryllium cooper. Or can you use the same cutting tools for the ductal iron seats

[@jeromedupont8994]

BEAUTIFULL JOB GREETINGS FROM BELGIUM

[@blacklisted4885]

How did it get so gouged

[@joaoraimundolemos]

Do you lap the valves seats with lapping compound?

[@PaulXchannel]

Titanium valves do not lappin !

[@FabiHtc]

You do a very good job👌✅🧑‍🔧