I Worked in a small engine shop that took old cams and welded big blobs onto the lobes and would make a custom grind. The machine was hand built and used a series of bearings on shafts that rode an original cam and they could make adjustments to how much duration and lift they wanted to add by simply turning a few screws that lifted or pressed the riding bearings. it was attached to a grinder to bring a rough shape back to the lobes then a series of cutting tools would go to what you set the screws at on the bearings, then they would polish the lobes on the same machine with a modified belt grinder that rode the same guide machine. It's amazing what some of the old timers would come up with. They were the true mechanics and machinists that actually fixed a part not just replaced it.

How about showing how you did the second lobe without chewing through the top lobe or sprocket carrier. .Very handy skip past the only info I needed to see.

Oh man, that lobe grinder was the icing on the cake! So, satisfying to watch the transformation. Fantastic.

As a home machinist and because you work on ATV/Dirt bike parts, I'm often depressed after watching your work. I'd so love to be able to do a small fraction of what you can, your work is amazing!! That's the cam grinder you made to fix a 5 valve YFZ head or something awhile back, I guess it comes in handy!! That cam you made is either exactly the same or very close to the ones used in my Honda ATC350X, same motor. Those 350D or 350X cams if in good shape used are selling for just about 300$. Megacycle or Webcamshafts will make us whatever we want but they often don't have any cores or it can take months to get them made; They have to cater to their Pro Motocross racers first. I'll have to watch your rocker arm video next, that's another part we cannot buy and they are very expensive even in used form. We can get old ones hardwelded and ground for about 200$ or billet for a bit more $$. I gotto learn from a toolmaker for about a year, he was awesome but it wasn't enough time. I sure wish I were your neighbor, but then you'd wish I weren't your neighbor 😁

Reminds me of the old xr250, they had issues or the issues owners faced if they couldn’t be bothered to change the oil and filter and check valve clearances regularly . Result was worn out cam and rocker arms. Great work , joy to watch

So nice to see you are using the momentum screw on the micrometer, and not the big barrel when you are measuring.. Thanks for taking the time to make the video and share it.

thanks for being considerate and muting audio in the appropriate places :) this is an awesome demonstration of skill, cheers!

Very nice work! 👍👍 The hardening parts is really difficult ,the japanese factories had big problems with it ,according to motorcycle magazines since the 80s. My Kawasaki Z 750 twin was one of them.

You probably could've used the old one, but now you've got a spare. And it was a high quality job. From one machinist to another 👍

Man, you're awesome. You're my hero 😆 love to see how you work, Im trully impressed. Some of parts you have repaired were just a trash before you started. Greetings from Poland!

You are so far above my skill level that I am in awe of your ability and work.

Great video enjoyed it,Always fun to watch something from scrap to final workpiece

Amazing ...... amazing job.....!!! My respect Mr Paul. I 'm waiting like crazy...for the next part.

Saya alumni teknik permesinan sangat takjub dengan pekerjaan anda ini, hebat bro! 👍 Karena saya sudah lama tidak mengoperasikan mesin-mesin tersebut, & sekarang saya sedang bernostalgia

Wow, so much work to recreate a single cylinder cam very impressed

Es un placer ver cada uno de tus trabajos.. bendiciones.

.... tak tomu říkám Meisterstick👏👏, super👍, zdravím z Czech Republic 🙋.

Nice work man. I have a guy asking me to make a cam for a Honda ATC 350. I will be looking at this for setup ideas. Thankfully hes got a place that will harden and grind it for me, because I don't have any of that machinery.

Great video! Thanks for letting us get a look.

A skill that many do nor have any more. Enjoyed the video thank you,

Você é muito profissional no que faz nota dez

Hi, how did you reached the inner cam? You showed only the outer one. Did you reach it with a end-mill with a large diameter and a small shaft? Or with a saw-blade. the marks are looking a little bit like this. Great work!

Loved every second ! Although, I'd love to see how did you design the part in Solidworks/Fusion. I do some little work on my own, and would love to learn from you

It’s amazing that it didn’t do damage to the cam journals which is a very common problem on the older Honda’s like this and the fourtrax 300, I actually have a video of one on a 300 on my channel. You are the best machinist on you tube that works on these engines by far!!! Love your channel and work!

i've got a '86 Honda magna 700 bobber that i will rebuild this winter. now i hope the heads, valves and camshafts need to be replaced. been a cnc machinist, still have access to them, and have a manual lathe and mill. sounds like good old fun😆

muito bom essa máquina que você usa pra dar acabamento no comando foi você que fez?

*I like your videos, the workmanship is very detailed 👌*

This seems to be a common failure on these quads, just watched another KZfaqr with the same issue, granted he didn’t fabricate a brand new cam like a complete champion… this was awesome to watch

The shop made cam grinder is really slick and it looks like it takes a very skilled handle to operate it, nice work. 👍

Just loved the effect of 16:12 . It made my day happy 😁.

c'est ce qui s'appelle de la haute précision .......! magnifique 🔬🔬🔬🔬

Bonne travaille comme d'habitude. Bravo Paul !👍👍👍💯

Stunning craftsmanship Paul

Cống hiến hơn nữa trong sự nghiệp của mình. Một lần nữa cảm ơn Đức Phúc và chương trình đã mang đến những giây phút thư giãn này. Mãi yêu!!!❤❤❤

Amazing work. Just perfect.

Great job Paul 👌🏼

Im moving to california to be an engineer. I am so excited to be able to afford a bigger shop for tools like yours!

Top top top top amazing job Bro This guys is out the planet I loved it

Outstanding professional work 👍

Super super work, well done mate!

That was awesome man, great build

Друг. Ты реально крут. Молодец.

Awesome work i enjoyed every second.

quite time-consuming work, but the results are really satisfying

This is really one man army job!

I'm impressed, nice work ! Can't wait to see how you'll fix the rocker arms

Very interesting and I'm impressed by the attention to detail. But the trx 350 is basically a lawnmower engine in a quad and it took you about 500 hours to make the bits that you can buy off the shelf from Honda for 300 bucks. Time is money!

Excellent interpersonal skill 👍👍👍👍👍

Da gusto verte trabajar, muy bien

beatiful work, congratulations!

I loved your work; and subscribed.

So are you just manually moving the camshaft in when grinding the lobes? It looks like it and thats some nice feel you have for that process

Руки из правильного места!

That is some mighty fancy whittling .

How did you prevent warping after hardening

Simply perfect 👏👏👏👏

Lindo ficou 👏🏼👏🏼

great skills Paul

पहले तो ईसमे कटर मशीन ‌बनाने का दीमांग ही बड़ा मशीन ‌है, फीर ईस‌मसीन‌को चलाने ‌वाला का भी दीमांग ‌एक‌ मशीन है,‌ वाह भाई ‌बहोत ही ला जवाब और अच्छी लगी ये , धन्यवाद जी 👍🙏🇮🇳🌷🇮🇳 जयहिन्द भारत के साथ 🙏🇮🇳🌷🇮🇳🌷🇮🇳🌷🇮🇳

Excelente trabajo 👌

What was the tool called that you measured the camshaft profile with?

Muito bom. Parabéns.

Thật tuyệt vời khi được xem video hay như này

Very talent and fantastic work.

Lookin fwd to seen thos followers get fixed. Great job .

Damn good work i appreciate

how do you do to measure and reproduce the cam´s?

that so sick men, i like your job

I want to know how you milled out the second cam profile seems like the first would be in the way

Perfeito parabéns

Perfect, i like you detailing is good

A work of art.

What I wouldn’t give for the knowledge, tooling, and time it takes to do things like this.

Nice work man.

What is that pink grinding stone you use for the final finish on the cam lobes?

Random question... Does the lathe you are working on towards the start (~5 min to ~10min) use controlled braking? Does it have a mechanical brake of some type to slow the spindle Or does it use DC breaking (maybe regenerative braking? I dont know what it is called but it is a function of many VFD's and requires a big breaking resistor)? Really just curious, that machine looks/sounds good :) and seems to decelerate at a good rate. I am in the middle of rebuilding my lathe so trying to figure all this stuff out and see what options are out there. If you don't mind sharing I would love to know. Thanks!!

Nice work and perfact manufacturer

a video like this realy makes me wonder how such a fabrication process could ever be pofitable. so many actions

Nice video. I like the music too 👍

wow you’re skill a amazing 💪🏻💪🏻👍👍👍

🇮🇩CIANJUR HADIR menyimak good job 🇮🇩

Great job PhoL 👍👍

Great work - did you cut those profiles free hand on the milling machine? And truing those grinding wheels?

Very hightech machines 🤘🤘👍👍 good job sir..

Question how the hell did you cut the lower lobe on the miller?? Thats crazy. Awesome work

That was really interesting. XD

Great job, and maybe it would be nice to try roller bearing for rocker arm,

Daaaamn do a vid on that contour measuring machine! Thats cool af!

Great bro

Muy buen trabajo saludos

How’d you cut the second lobe?? And just freehand grinding the lobes?

Very impressive!!

nice work

Your worke is super g

Bạn làm rất tốt thật tuyệt vời

pěkná práce!

Good job bro... 💯👍👍👌👌👌 💕❤️🌹🎉

if in Indonesia the name is copy cam. but not as good as this. very good work

Very nice work keep it up

Great job