Man, your video saved me.i'm a brazilian mechanic (cars, no motorcicle) and i buggout a japanese xl 250 R and here whe don't now anything about this. Motorcycles in Brazil is like in India, 80% is under 200cc and it is most used to deliver all kinds of thing like; food, auto parts, people and drugs(too much drugs), in short, about this whe dont got too much "professionals" in this area its hard to have a motorbike that other cals a white fly with blues eyes. I go "copy and past" all you do in this video! Thanks!
I came across your channel as I'm working on an 07 Suzuki RMZ250 with bad cam journals. I am blown away by your machining skills and the engineering knowledge you have to fix these complex problems. I subscribed, can't wait to watch more!
This is on another level. If there is an apocalypse, you will be one of the most valuable people, as only you can keep things going. I will stand guard for the zombies 🧟♂️ while you work.
OMG! Some of the comments! Its about saving the head! Not a power increase, people think seems to think these parts are cheap 🤣🤣🤣 easy to find 🤣🤣🤣 ...NOT.. So he is showing how it could be done. Really good work ,Paul.
Great job, the only question I have is ¿what about the lubrication?, with that bearings you close the oil holes that let the oil engine lubricate the bearings. ¿Perhaps you might have done holes in the barings to let the oil pass thrugh.
This is truly impressive workmanship! However, the bill for rebuilding the head alone for this motorcycle probably exceeds what this entire motorcycle cost when brand new in 1982! I bought a new 1982 Honda XL500R from a dealership in Longmont, Colorado for about $2,000. (+/-) Great bike! FYI: My bike had white number plates. I think the bike you have shown several times in this series, with black number plates is a 1981 model. I could be mistaken, if this particular bike is not an American model. Sometimes the manufacturers made subtle differences in their bikes they exported to different countries. Again, very impressive machine work. I enjoyed this video...Thank you for posting this!
Because sometimes it's not economically feasible to do it (like the two bearings on the left at 14:29, you have to make all parts of the camshaft individually to fit the bearings and then assembling it all together which takes time and is more expensive) and sometimes the work load of the mating surfaces is not demanding enough to need bearings and you can just get away with using a thin film of oil (like in this engine) or bearing inserts.
@@jeronimomurruni they dont need to be ball or roller bearings. A plain bearing similar to crankshaft bearings would do and be a much better solution than running the cam directly in the head
I had planed on building some aircooled VW camshafts like this many years ago. ford and dodge have made hundrads of thousand of press togeather camshafts.
Handmade roller rocker arm saja bro, Seperti montir² balap motor yg ada di Indonesia. Mereka yg suka merubah sepatu rocker arm type biasa menjadi yg model rocker arm type roller... semoga membantu. 😊
job well done!! my only question is how are the lobes going to get oil? the original cam supplied oil through the center to the lobes and bearings to lubricate and cool the cam. im sure you have a trickster idea to fix this? great vids!!
@@PaulXchannel I never said it had a grease hole. the engine oil is pumped up through an oil port that feeds the camshaft through the cam gear side and is fed through to the lobes and bearing surfaces.
très belle réalisation mais pas vraiment adaptée d'un poussoir a un basculeur ,la forme de came est différente pour compenser la différence entre l'attaque et le relachement avec un bras de levier de différente longueur d'ou une came assymétrique obligatoite . j'ai fabriqué des arbres arbres a cames .avec certte came" il va voir une vitesse de montée et descente différente vu que ses cames sont prévues pour des poussoir plats . côté le plis arrondi plus près de de l'axe du basculeur côté droit au bout du culbuteur ce qui permet d'avoir une ouverture et fermeture linéaire a la soupape . a part ça , c'est un superbe travail . bravo .
Ingenious! Ive been pondering how to tackle the centre bearing for ages. Nice to see somebody else thinking about it. What material did you use for the centre shaft? Was that 6803s for the centre bearing? On my XL500RC the opening flank of the exhaust and closing flank of the inlet are flatter than the opposite flanks on the overlap side. How much do we need to worry about that profile when sourcing the cam lobes? Did you do a vid for the followers? My exhaust follower pad is exhibiting similar two distinct wear facets as yours. I can't explain why it's wearing like that. Thank you.
Beautiful job, as always! Quite a few modern car camshafts are constructed from a hollow tube with the lobes pressed on, no other fastening is used, just the press fit. They work fine unless the timing belt/chain fails and the valves hit the pistons which can cause the lobes to slip. The lobe profile of the car camshaft is obviously different so this will affect valve duration, but more importantly I fear you may have set the lobe separation angle (aka lobe centre angle) too low. Most cams will be in the 100-110 range, I've never seen a cam as low as 90 degrees.
Other rocker arms only change the ratio of lift from cam profile to valve, but not the profile shape itself?! Looking at the smaller LSA and smaller cam profile, looks like less power than the original
cams by themselves can't alter too much the running of the engine.. For what is exposed in the video, it will probably gain a lot in the lower rev range, simply because of the lower friction and less lift.
Great video, but I was surprised that you didn't re- cut the dead centre when you placed it in the 3 jaw chuck! Not doing so defeats the purpose of turning between centres. An eyeballing of the 2 centres does not help here.
Well done, only one question: The timing between the 2 cammes are exactly the original?, and again: the drive pinion it's in timing also? Technically it's ok, but, 4 bearing on the same shaft, short shaft, are dangerous because one of the 4 easily will collapse in a short time. The tensions in the head are important, temperature also. Will be a disaster in this case. But, it's a good job, well done.
Would be nice to know how you aligned the lobes to give you the 90° angle you wanted. Also, the cam sprocket carrier, top dead centre (timing the cam). If these are not spot on then the engine will not run at its optimum, surely? If everything is correct, it would be nice to see the engine running, possibly on a dyno (please). Those pads on the rocker arms look very bad. Good luck with their repair! Very enjoyable content, nice skills 👍🖖.
I have also like this model xr 500r here in the philippines untill now still for restoretion but the problem how to provide the some spare Parts because this unit is already out of stock
![PASULOL รามเกียรติ์ ตอนที่ 4 นนทกพบรัก [Ramakien Ep.4: Nonthok in love]](http://i.ytimg.com/vi/tMUQgmZzf_A/mqdefault.jpg)
Man, your video saved me.i'm a brazilian mechanic (cars, no motorcicle) and i buggout a japanese xl 250 R and here whe don't now anything about this. Motorcycles in Brazil is like in India, 80% is under 200cc and it is most used to deliver all kinds of thing like; food, auto parts, people and drugs(too much drugs), in short, about this whe dont got too much "professionals" in this area its hard to have a motorbike that other cals a white fly with blues eyes. I go "copy and past" all you do in this video! Thanks!
I came across your channel as I'm working on an 07 Suzuki RMZ250 with bad cam journals. I am blown away by your machining skills and the engineering knowledge you have to fix these complex problems. I subscribed, can't wait to watch more!
This is on another level. If there is an apocalypse, you will be one of the most valuable people, as only you can keep things going. I will stand guard for the zombies 🧟♂️ while you work.
apokalypse has no lathe working.
@@heinzfissimatent4294 indeed 🤜💥🤛
Na give me the same tools 😂
The work is amazing but the esthetics of all your vids is pure unbelievable madness! So much respect ✊! Thank you 👍
I had been wondering how you would tackle the camshaft rebuild. Pure ingenuity at work!
Real craftsmanship, almost a lost art!!! Excellent!👍👍👍👍👍👍👍
OMG! Some of the comments!
Its about saving the head! Not a power increase, people think seems to think these parts are cheap 🤣🤣🤣 easy to find 🤣🤣🤣 ...NOT..
So he is showing how it could be done.
Really good work ,Paul.
Be nice to know how the engine runs in the end as the duration of the cam looks different even though the lift is the same.... 👍🏻
Love your outside of the box repairs. Most folks want to follow a manual but there is more than one way to skin a cat.
Amazing work on this whole restoration of this XR. My most favorite vid rite here
*Selalu menantikan video² project dari chanel anda yang meinspirasi 👌*
It's great, few people think of a way to fix it like you. I see what you do is quite easy😊👍
Making the most out of the materials and skills at hand the later having plenty cheers mate
One of the best repairs I have seen on YT in some time...great idea
you are a Genius!!!! I admire every job you do and thank you very much for sharing your knowledge with us blessings always
Great job, the only question I have is ¿what about the lubrication?, with that bearings you close the oil holes that let the oil engine lubricate the bearings. ¿Perhaps you might have done holes in the barings to let the oil pass thrugh.
Lubrication hole - time 7:42
в каждом транспортном средстве должна быть частичка ЖИГУЛЕЙ
Где он распред от жиги то взял?)
@@ВасилийСтарков-т2м ну ради такого дела можно и жигу купить
I love watching your machining work, and problem solving
thanks for the upload :D
This is truly impressive workmanship!
However, the bill for rebuilding the head alone for this motorcycle probably exceeds what this entire motorcycle cost when brand new in 1982!
I bought a new 1982 Honda XL500R from a dealership in Longmont, Colorado for about $2,000. (+/-) Great bike!
FYI: My bike had white number plates. I think the bike you have shown several times in this series, with black number plates is a 1981 model. I could be mistaken, if this particular bike is not an American model. Sometimes the manufacturers made subtle differences in their bikes they exported to different countries.
Again, very impressive machine work.
I enjoyed this video...Thank you for posting this!
Thanks.
The photo of the motorcycle is just illustration purposes only.
But the engine is by should have been identical.
Fantástica la recuperación de la culata 🤯🤯👍👍
Гарна робота! на DR650 така ж проблема
El mejor trabajo q e visto, un saludo desde Argentina. Y ojala pudiera hacerle ese trabajo a una Suzuki Dr350 q tengo.
it's a shame that in my country there are not many tools like you use, I can't imitate what you do. good job sir
what country are you in
I had that very year and model. Sold it and bought an XR600R. Then I returned to my roots and bought a 2-stroke CR-500.
Exelente trabajo MAESTRO ,le felicito y gracias por compartir , un saludo amigo !!!!!!!!!!!!!!! .
🇮🇩 INDONESIA [ first in Love and love ]
You are something special. Thank you
А как же масляный конал? Как распредвал смазывать будет?
Impresionante trabajo . Para sacarse el sombrero. Saludos desde argentina
Brilliant solution to would normally be a trashed head, great job.
MASTERCLASS!
Congrats.
high quality level of work.
Great job! I have many times wondered why bearings are not normally empoloyed in the heads the way you just did.
Because sometimes it's not economically feasible to do it (like the two bearings on the left at 14:29, you have to make all parts of the camshaft individually to fit the bearings and then assembling it all together which takes time and is more expensive) and sometimes the work load of the mating surfaces is not demanding enough to need bearings and you can just get away with using a thin film of oil (like in this engine) or bearing inserts.
RFVC engines and on have bearings on the cam. this engine was replaced by these engines.
@@stevebloke5455 thanks! I didn't know that. I just found a video were the bearings are clearly visible
th-cam.com/video/SrPzZSoi53M/w-d-xo.html
@@jeronimomurruni they dont need to be ball or roller bearings. A plain bearing similar to crankshaft bearings would do and be a much better solution than running the cam directly in the head
Can't wait for the next!!! Perfect job you do with every part. Thanks for sharing with us, love your videos.
Aí simmmm ficou melhor que o original kkkk
I had planed on building some aircooled VW camshafts like this many years ago. ford and dodge have made hundrads of thousand of press togeather camshafts.
Superb engineering 👌🏻😎
Great video. I would love to see that engine run! Keep it up.
Spettacolo di lavoro
Awesome job Paul
This dude is a beast.
The best channel! I love your work!
Handmade roller rocker arm saja bro,
Seperti montir² balap motor yg ada di Indonesia. Mereka yg suka merubah sepatu rocker arm type biasa menjadi yg model rocker arm type roller... semoga membantu. 😊
What a great skills 👍🏻
bravo ! excellente solution !
job well done!! my only question is how are the lobes going to get oil? the original cam supplied oil through the center to the lobes and bearings to lubricate and cool the cam. im sure you have a trickster idea to fix this? great vids!!
The original camshaft does not have a grease hole.
It is lubricated through the cylinder head.
@@PaulXchannel I never said it had a grease hole. the engine oil is pumped up through an oil port that feeds the camshaft through the cam gear side and is fed through to the lobes and bearing surfaces.
@@stevebloke5455 where exactly is the oil port on the cam gear side I cant find mine I need to check it now
@@stefenmitchell4112 the oil comes up around the rear cylinder stud on the cam chain side.
I got the same question to....
You are my new hero 😵
très belle réalisation mais pas vraiment adaptée d'un poussoir a un basculeur ,la forme de came est différente pour compenser la différence entre l'attaque et le relachement avec un bras de levier de différente longueur d'ou une came assymétrique obligatoite . j'ai fabriqué des arbres arbres a cames .avec certte came" il va voir une vitesse de montée et descente différente vu que ses cames sont prévues pour des poussoir plats . côté le plis arrondi plus près de de l'axe du basculeur côté droit au bout du culbuteur ce qui permet d'avoir une ouverture et fermeture linéaire a la soupape . a part ça , c'est un superbe travail . bravo .
A beautiful work!!!
Mieux que l’original, bravo 👍
Muy buen trabajo...,perfecto...gracias
You… you are truly an artist ❤️.
Very nice idea 👍
E vai conseguir colocar a polia da corrente de comando no comando de válvula?
so nice job!!!!
Good job 👍🏻
Ingenious! Ive been pondering how to tackle the centre bearing for ages. Nice to see somebody else thinking about it. What material did you use for the centre shaft? Was that 6803s for the centre bearing? On my XL500RC the opening flank of the exhaust and closing flank of the inlet are flatter than the opposite flanks on the overlap side. How much do we need to worry about that profile when sourcing the cam lobes?
Did you do a vid for the followers? My exhaust follower pad is exhibiting similar two distinct wear facets as yours. I can't explain why it's wearing like that.
Thank you.
th-cam.com/video/4l5jrdnaIN4/w-d-xo.html
@@PaulXchannel Thank you
yeahh, very good work!
Beautiful job, as always! Quite a few modern car camshafts are constructed from a hollow tube with the lobes pressed on, no other fastening is used, just the press fit. They work fine unless the timing belt/chain fails and the valves hit the pistons which can cause the lobes to slip.
The lobe profile of the car camshaft is obviously different so this will affect valve duration, but more importantly I fear you may have set the lobe separation angle (aka lobe centre angle) too low. Most cams will be in the 100-110 range, I've never seen a cam as low as 90 degrees.
Yeah. The XRs had cams from 103° to 110° LSA.
Lobe angle is o.k., looks like the original camshaft, because of the rocker arm-distance. It will cause a lift-peak-separation of about 105 to 110°.
As your new camshaft has a slightly different profile, how do you expect this will affect the running of the engine?
there will be other rocker arms
Other rocker arms only change the ratio of lift from cam profile to valve, but not the profile shape itself?! Looking at the smaller LSA and smaller cam profile, looks like less power than the original
It's about saving the cylinder head.
Of course it's not like new ;)
cams by themselves can't alter too much the running of the engine..
For what is exposed in the video, it will probably gain a lot in the lower rev range, simply because of the lower friction and less lift.
@@TheSilviu8x Have you heard of a gentleman by the name of David Vizard? His work on the Mini is legendary. He does stuff with yank v8 lumps too.
Top Job, Sir 👌
I'm impressed.
Wonderful job!!!
I'm curious, for furute reference, how much did this cost the customer? Fantastic work!
Where are those races getting their oil feed from? They look pretty shielded from splash?
C’est incroyable bravo .
Tu peux faire la même chose avec un model double camshaft ?et aussi camshaft stage 2 ou 3 ?
Less friction= more power!!!
Lubang pelumasan oli nya gimana itu boss ??
Impresionante!!! ❤️🍻👍🏻
Two of the valve springs are upside down with 'closed' coils at retainer end, you didn't put it together the same as it came apart?
I wonder what the true cam lobe separation is now?
....impresive thanks
I had one of those XL 500R the XR version with blinky's and headlight.. It would go straight up a tree if you could hang on.
Nice joob. Cover perfect.
Nice video
Wow amazing
Great video, but I was surprised that you didn't re- cut the dead centre when you placed it in the 3 jaw chuck! Not doing so defeats the purpose of turning between centres. An eyeballing of the 2 centres does not help here.
Well done, only one question: The timing between the 2 cammes are exactly the original?, and again: the drive pinion it's in timing also? Technically it's ok, but, 4 bearing on the same shaft, short shaft, are dangerous because one of the 4 easily will collapse in a short time. The tensions in the head are important, temperature also. Will be a disaster in this case. But, it's a good job, well done.
Agree,those 4 bearings cannot be used on this part if the engine..it will be damaged in a short time..
Don't worry the engine is still running : )
@@PaulXchannel thanks..great ideas...keep them comming...!
You are a genius, but I have a challenge for you, can you convert a motorcycle rocker arm to a bearing rocker arm? message from Colombia.
🎉 una obra de arte.
Salam dari Indonesia
i am shocked wow !!!
Gute Arbeit, haben die Kugellager die Kräfte gut ausgehalten?
👍
Would be nice to know how you aligned the lobes to give you the 90° angle you wanted. Also, the cam sprocket carrier, top dead centre (timing the cam). If these are not spot on then the engine will not run at its optimum, surely? If everything is correct, it would be nice to see the engine running, possibly on a dyno (please). Those pads on the rocker arms look very bad. Good luck with their repair! Very enjoyable content, nice skills 👍🖖.
Super guru gi
Brilliant!
What are the bearing numbers that you used. I have a 1982 Honda XLS500, on methanol, which needs this happening.. Very appreciative of this video..
6000 . . .6803
@@PaulXchannel Thank you so much. I really enjoy your work with the Honda singles.
Super💯💯💯💯💯💯💯👍👍👍👍👍👍
top work
Just genius
Bravo...
Super job 😅😅
Beautiful mind
90? Is not the lobe separation angle usualy around 110?
I need same for my xl500s 1981 . Do you think it is possible?
👍 жду следующее видио 👍
That's Awsome can you do mine like that ??
عمل رائع جدا لكن لا تتأخر علينا ولا اعرف لا ترد على التعليقات لا تكن متكبرا
I have also like this model xr 500r here in the philippines untill now still for restoretion but the problem how to provide the some spare Parts because this unit is already out of stock
Only by machining ; )
Brasil 🇧🇷