Making and replacement of valve seat. The cylinder head from Honda 450cc - Foreman 450 - TRX 450 S

Hi.
This video shows - step by step - making and replacement of valve seat.
Material for the new valve seat - 42CrMo4+QT
. . . for more interesting videos click ,, HERE "
/ @paulxchannel

[@mirosawmilewski5949]

Świetny pokaz naprawy głowicy. Szczegółowo, nie ukrywając szczegółów. Ogromnie przydatny. Przekazano wiedzę, której trudno znaleźć w książkach. Ten film to rodzynek !!! Nie spotkałem takich nigdy. Podziwiam, pozdrawiam i dziękuję.

[@jacklarson6281]

man.., I love this kind of stuff. that was awesome.., instead of buying a new head, you totally fixed the old one like a Road Warrior.

[@rideyourbikent]

Great video no worthless chit chat just a good job being done in an expert manner . Great tools and equipment .

[@KevinCeoi]

kzbin.info/www/bejne/q4DOZn9uhsSSl9U valve seat ring removers

[@RANGOArts]

you have a tool for everything. that's heaven for me.

[@anhuynh3098]

A great demonstration clip with profound wisdom that really pays off. Thanks Paul !

[@antoniomontana2232]

Инструмент и исполнение на высшем уровне ! Похожее имею. Одинаковый у нас с Вами только маркер !

[@iurii-wind]

Как приятно смотреть когда работает мастер! Золотые руки! Best!

[@yarrdayarrdayarrda]

The precision tool for measuring valve seat counter bore diameters is excellent. Never realized such a tool existed and figured you'd just use verniers.

[@spiKey0svetlana]

All those amazing, high end, expensive, precision tools... 😍

[@ashdonhobsim2040]

Wish we had someone as talented as you and your machines around here. I need valves cut right now lol

[@markjohnson6130]

Nice video, thank you. Your tools make me envious. I have a flow bench and you were in a great place to improve the flow simply by boring the valve insert seat to .9 diamanté's of the valve and then do a back cut on the valve seat. That would give you a bigger flow gain than porting the head. cheers and nice tools.

[@muushkin]

Do you mean a thinner valve seat? (Smaller inside diameter?) and then adding chamfer on backside of seat towards valve guide?

[@markjohnson6130]

@@muushkin Most people when porting a 4 stroke head focus on the port and narrowing the boss around the guide. but the biggest flow improvement comes from the valve seat area. Measure the valve OD diameter then bore in past the insert about 5mm exactly 0.9 of that valve diameter OD and blend into the port with grinder. Then cut the 45 degree seats and use the 30 deg top cut to position the head valve seat where you want on the valve. Then a very important step is to back cut or grind the inlet valve to 30 deg from the 45 deg seat edge towards the stem so that the valve ends up with 3 angles and the inlet seat seat ends up with 3 angles. Clear as mud I bet😁. Flows like a stream train 👍

[@mikerieck306]

@@markjohnson6130 I go .9 on the intake seat and .85 on the exhaust.

[@markjohnson6130]

@@mikerieck306 Small world Mike lol. I linked into your dyno Vid, impressive stuff, it sounds really quick in the higher RPM, kept the dyno operator reflexes on the ball.

[@pkgaming4070ti]

I have never seen such a good work before

[@victorgarabato2341]

Greetings from Argentina. U are amazing.

[@tonyschiffiler4816]

Attention to detail , same principal as a custom Chevy cylinder head . Nice job .

[@wamaaris3347]

Really admire your professionalism in the equipment and tools you are doing the job. Wish I had those equipment,

[@РоманПриморский-э6г]

Что скажешь, приятно смотреть,и есть к чему стремиться и учиться.

[@avsmotosolucoes]

The best!!!! I from Brazil Love your work

[@bendolpiomoto1034]

Tutorial yg sempurna hasil yg maksimal .ful support from indonesia 👍👍

[@aragrox]

You are the type of people I don't mind paying to get work done for me

[@Me-fj8sb]

It's not about saving the head, is about the skills, the dedication, the passion of creativity, now here in America you can buy new for a cheaper price than the labor, but theres many countries that relies on fixing it because the ability of finding the part as fast as possible, lots of money could be lost in 3 days because of a engine broke down in a mass production line against a few hours on a local machine shop, FANTASTIC JOB

[@slickricktheruler]

I could watch this chit all day! Give me more please.

[@PaulXchannel]

kzbin.info/www/bejne/eZK5daV8jr2kgdU

[@laosgpsmapmidnitemapper9411]

Great demo , cool Tools and a lotta Work ! thanks I felt like I just did a day in the shop:)

[@c__TattinhNhi]

great technique, and great tools công😄👍

[@torentmonkey]

Very ASMR and funny edit. You might want to tag that in the vid to get more views. 👌

[@vornvun618]

How much this item cost brother?

[@sujaradhakrishnan5878]

Showed a great work with the hardest things

[@mesquitaautoeletrica1368]

Fantastic vídeo! A big hug from Brasil.

[@frfrpr]

That was some outstanding filming. Thanks

[@DgtalBreakz]

Awesome work! So relaxing to watch...

[@user-wh6bw1py3k]

I have done hundreds n hundreds of these trx heads guides also shift get loose A easier way of removing seat is to shrink it with weld basically falls out i use to use kerzan valve inserts kz3819 they are extra thinker than the average seat insert the valve height out the back is 37-37.5mm from spring bass to valve tip i also make oversized guides

[@PaulXchannel]

👍

[@team5xray596]

Como siempre da gusto verte trabajar, buen video.

[@tslr36]

O cara é muito profissional.

[@michaelslee4336]

Finally someone not using center drill in the lathe, because they are not putting in a center.

[@ZygmuntKiliszewski]

Very precise repair with the use of perfect tools. Another congratulations 👌.

[@ZygmuntKiliszewski]

Thank you 😀.

[@TiagoEspinha.]

beautiful work hug from portugal

[@infographistehistorichaiti5929]

Super high precision instruments.

[@makrugermd1249]

Отличный ремонт!

[@saudagarperantau8331]

Wow, so much tools and time to repair one damaged valve seat.

[@АлександрМарчук-н8ы]

Хорошо бы перед таким серьезным ремонтом заменить направляющую втулку клапана, что бы базирование пилоты было более точным, и полностью восстановить ресурс сопряженных пар трения.

[@Liax_ndranta]

I keep listening to how you work on a machine. Well done.👍🏼

[@sammorgan31]

I use PC air duster to freeze parts. Costs less than half of those "freeze sprays" and does the same thing. Just hold the can upside down so the liquid comes out.

[@APPS333]

Good replacement and precision tools and carefull measurement but i see some sharp edges above the seats carbon deposit might build up there

[@itsmeitsdrew]

this was the coolest ish ive ever seen - how does one even learn this :D

[@PaulXchannel]

kzbin.info/www/bejne/jKSvkoWieaaAfJo

[@robertoudokrapf453]

OLÁ. 26/12/23. Completando... a ferramenta utilizada é ÓTIMA mas faltou o acabamento final que indica a área de vedação que se tiver invertida poderá em muitos motores provocar a "flutuação de válvulas" que as vezes é confundida por "corte devido a rotação excessiva. ABRAÇOS...Roberto Udo Krapf

[@victorgonza4528]

Outstanding work man well done

[@robinrochan9301]

Waww amazing very very précision work very nice thanks 😊

[@димасикавтослесарь]

Лаикккк!!!

[@SRTmotorsport]

Good and clean job.Try to pour some alcohol when you cutting the seat pocket at the head.you will have better wall surfaces.

[@wahyufendi7912]

What is the valve seat material?

[@AdamHammel]

Cast iron

[@АлеН-ч4у]

А стружка как у стали

[@felixcat9318]

Artistry in Metal...

[@mendingmotos]

This will be useful for my next build!

[@30Higgins]

Could you please indicate at wich temperature you need to heat the head and what is the (very impressive) refrigerant spray ?

[@johngoode6787]

Hi Paul excellent work as usual but could you show us in a future video how the boring head machines the counterbore at the bottom of the hole your boring. Cheers

[@morenofusaro2630]

Complimenti per l'attrezzeria a tua disposizione 👍

[@galinashirai9695]

Наверное дешевле головку купить....чем за такую работу мастеру платить....

[@screwsnutsandbolts]

Great videos 👍

[@mohamedismail4525]

Very precise work, skilled person with precision tools

[@sddiymakeitworthit7512]

Nice presentation thanks 🙏 👍

[@davidcort2857]

Nice video, a pleasure to watch.

[@bernibeckmann9753]

very relaxing to watch, informative too

[@strattuner]

excellent work ethic to detail,marvelous,done right is everything

[@aliadel3331]

good tools and work

[@karolisbickus7313]

I bet I coudn't find a machine shop in my country that could do this job.. thanks for sharing. Now I know that job is possible

[@dadibot9610]

love that machine

[@JakeTheCrow]

These are tools of my dreams!! 🤤

[@tutulrahman9406]

Very very nice, thanks,

[@praveen19007]

Genuine work very nice 👍

[@letsfixit8812]

watched the video thoroughly and enjoy it thought you deserved a comment, just out of curiosity how do you perform leak test ?

[@dattatrayariswadkar5371]

Excellent demo, fully explained.Procedure is cute .Keep on.

[@juleol99]

What grade steel did you use for the new seat? Great video.

[@PaulXchannel]

42crmo4+qt

[@Megakoolguy357]

I wasn't confused until he mentioned an overlap of 0.1 mm. I watched that far in the video and finally noticed he was using metric.

[@tiabrown7032]

why was the old seat look magnetize when machining it

[@broo_shs]

back in day i did in my mopeds-moto cross bikes & cars, in old 80''s hand tool a bigger valve seat.

[@petegkSalonika]

great pro work mister your video is very educational, i did replace valve seats on a honda xr 250 work done by a local workshop is a few weeks the seats were deformaτed by the valve stroke on them,,,, where are you located? many thanks in advance peter

[@mudachuka12345]

I enjoyed the video and the presentation it was excellent. Not sure how accurate the machine can hold a concentric tolerance. The most important critical thing is valve seat to valve guide concentricity. What tolerance are you able to get the seat and guide to? Otherwise known as valve seat run out. Do you measure it after cutting the valve seat? There is a measuring tool that fits into the valve guide and places a finger clock DTI on valve seat and you rotate it to measure if the valve guide is concentric to the valve seat.

[@webtoedman]

Valve seat concentricity can never be better than the concentricity between the valve guide and the cutter arbour. If the guide hole is worn oval, then it is better to replace the guide, and start afresh. Expensive head machines use compressed air to create a self centering effect between the tool arbour and the valve guide. When cutting starts, the tool and the work "define their own centres", and the concentricity is produced automatically. (Allowing for clearances) It isn't overwhelmingly critical, unless the parts are grossly miss-aligned, because the two working faces are conical, and tend to self align, at the expense of a little extra friction and possible valve stem and guide wear. If the oil seal on the guide is good, then you wouldn't even notice, especially on a generator.

[@budiyononuhkayi7439]

Goodjob & good tool

[@dexterpagurayan4881]

What a patience consuming process

[@MsKonstantin65]

Отличная работа!!!

[@galinashirai9695]

Да не то слово...

[@ericgossard8808]

What kind of press fit do you use on your seats in a 4 valve head (TRX450)?

[@ramiretz]

WOW..... Pure Art again... i love your videos !!!!!!!!!!

[@mikeymike758]

Amazing machining skills, but I'd like to know the cost difference of you repairing the cylinder head versus just buying a new cylinder head? :-)

[@dc6233]

Damn, those valve cutters are far better than the India ones you tried out...

[@karthikp5180]

really superb.welldone.greating from india.

[@JoyJoy-sq2bt]

great tools..amazing

[@tslr36]

Profissional de mão cheia. Parabéns muito bom seu conteúdo. 👏👏👏👏

[@stephenr1999]

very nice. precision is kinda my Jamz

[@Trikekid84]

Do these bikes still not use hardened seats? I know cars do because of the unleaded gas and other modern fuel tech.

[@sajitheeshwara5070]

Talent work. Spary cooling liquid before insert seat is a very good idea. Can we use this for " brake cleaner " contact cleaner " or petrol?? What is ur idea??

[@bigears4426]

What material is used for the seat , you have some lovely tools. I still lap by hand too get a perfect seal

[@frundlemud]

First class.

[@Shoorit]

Beautiful work.

[@ГаджиМагомедов-ф9ф]

Интересно, металл имеет нужную термообработку. А то кажется сделано из сырого куска металла.

[@horexwerkstatt7010]

Richtig geil 👍👍👍

[@K3n520]

nice tool. great dude.

[@poritoshmodak6356]

Sir, you are Best

[@jhonisilva9312]

Ola colega .poderia imformar qual.o tipo de aço q esta usando para fabricar as cedes .?obrigado

[@cristianomallmann3842]

Amazing stuff, and what a clean job. Best whishes.

[@lee4847]

Incredible

[@davidsyahputra1410]

Nice video paul👍. Just suggestion for next video how to change big valve for cylinder head. Thx

[@maheshboyini7972]

Beautiful work

[@Elchapo62]

Is that a hair line crack between the seats? The oversize seat will make the crack larger.

[@PaulXchannel]

Time ?

[@lexdack9106]

Just love your videos! Clear to see the damage due to heat. Any background information on the rest of the engine? I guess honda did not intend something like that to happen. Is it sure it won't happen again after the repair? What was done wrong for that to happen?

[@PaulXchannel]

Thanks. Excessive engine overheating in the field - logging.

[@lexdack9106]

@@PaulXchannel Makes sense, thank you 🤓