This is the first fix I've watch that *I* might be able to do myself. Thanks for sharing!

Nice job! One way i found that also works pretty good is, apply some fine valve lapping compound to the camshaft, torq the cap down and 'lap' the camshaft in the head. I was amazed how nice and easy it worked out. Keep up the good work! Cheers

I had this problem on my yzf250. The cause was the bearing on the cam. It wouldn’t sit properly. Got a new bearing and hey presto it was fixed. Keep up the good work. Your projects are amazing 🤩

This series should be a 20+ minutes long. Excellent job!

I knew exactly what you were going to do as soon as the bluing came out. I then kicked myself for not thinking of that before. I've done this same thing for scraping in my lathe bed and carriage ways.

You are great teacher! Thanks that you shows us your experience !

I did that on a race bike a few years ago with Roger DeCoster and Goose looking over my shoulder and shaking thier heads. The bike went mint 👌 😁

Dude, thank you so much. I'm poor so i can't pay someone to do this crap in my 25 year old bike. It's still running because of videos like this...

You certainly know what you're doing well done 👍

excellent as always

Veri interest bro! Nice job!

A good tool, sharp.

Nice job ❤🤙🔥🔥🔥🔥

Muito bom o trabalho,meus parabéns!!!!! Vc é dedicado ao que faz🧐🧐🧐

Cooll..nice job

good job mate, greetings from indonesia

yep, brilliant clip, you understand. also like the comment below mine, i've also lapped in tight camshafts & housings. nice work. 🏴‍☠️

О да, о ес , о геометрии можно забыть и никогда не вспоминать.

Nice bro

Un capo!!!

Well done

Hi Paul, love your videos and equipment, have you ever used a product called Plastigauge, with this tool you would be able to match the oil clearances between the good cam and the damaged cam to get the right clearance for the oil plane between the two halves of the caps?

You are removing aluminum both from the journal and the cam. Where did this aluminum come from? Has it just been “redistributed” from one area of the journal to another? If so, are there now low spots where this aluminum came from? I’m not questioning the repair, I get that you are saving the head - not restoring it to original, I’m just curious.

Bị như thế do bơm nhớt hay hụt nhớt máy?

Странная технология - снимать слой алюминия в местах, где краска не стёрлась, а следовательно оставался зазор между крышкой и распредвалом... Я не понял идею этого ремонта.

You don't like muriatic acid for that aluminum. On that cast iron?

I've got a similar problem on my bike, except the cam cap is slightly warped with about 0.4mm lifted on one of the bolt locations when the 3 others are flat, do you believe that this method may be able to fix it? the intake cam is very tight and requires a bit of force with 2 fingers to spin, however if i slightly loosen the bolt in the hole that is warped up, it spins freely, i have checked the bearing which is fine, and the cam it'self doesn't seem to have damage, do you think that this method, or using lapping compound may work on my bike? for reference, its an 07' kx250f, and from what i can find, I cannot really just buy a new cam cap since it is machined attached to the head, pairing it to this specific head, could this method or lapping compound work on my bike or are there other methods you may suggest, do you think?

hmm interesting, i thought you would need to hone out the bore

Never seen such a quick method of properly fixing worn alumium how about honing a few thou then hard anodize or ceramic coat aluminum ?

What causes this camshaft to seize up, just lack of top end lubrication?

is the head aftermarket or does the yzf comes with dohc 5 valve

nice job.i have an 08 rmz250 that needs that done .how much $

Шикарно .

God job! Why? Low oil?

Well Lad, if I good see you have missing for both cam clip or half ring on bearings

👏👍🤝💪

Amazing craftmanship! Recently a mechanic damaged the cylinder head of my Husky FC 250 during changing of valve seals. Now intake shaft won’t turn. I guess a need a deburring tool now. Did You finish the surface of journals after using deburring tool? Greetings from Poland!

Paul X...can i ask how much play you leave between the camshaft and the seat?

😃👏👏

Apakah saya boleh kesana pak???

What caused the tight camshaft- poor machining by the manufacturer?

this head can fitting to GY6 engine I think

We're can i get the tools that you use it...??? What the tools name that you use??

In my opinion you used too much engineers blue. It only needs the smallest amount to find the transfer points.

Ok what caused it

I also did this to my wr 450 using 1200 grit sand paper and slowly polishing the surface I didn't want to use to method because I feel its a short term solution. cam shaft up and down play is only increased and valve clearance is never 100% please correct me if i am wrong paul ... also I have another way to repair this job but I am no machinist our aluminum welder again please correct me if I am wrong but is it possible to weld the aluminum and center bore

really sketchy

Someone just threw a 2nd hand cam in there.

hello, I'm writing from Italy, I've been following you for a while, you're very good. I want to ask you something. My kxf 450 has reworked the camshaft seats, the damage is not serious and can be repaired, according to you, brazing is better with hole restoration? or better to apply a bushing like in your video?

Sorry but is not a professional job made here, you can use a reamer for this job and a fine grinding for the camshafts, don't forget the plastic gauge.

sorry, but this fix looks not professional.

nice botch

No wonder they need over Hall... All the Time.... Very Badley engineering

Веду пьяных баб домой

What happens when the engine heats up? The expanding metal could create new contactpoints where metal will transfer again, resulting in a lot of wasted time. Buy a new head. Stop wasting time.

Ehhh dont know about this one, this is definitely not best practice...