Put the cases in the oven at just over 100 deg C until fully heated & let the bearings fall out naturally. On reinstalling the bearings, heat the cases again & put the bearings in the freezer to cool them & they just drop in.
Steel has around half the coefficient of expansion of aluminum. I've taken lots of bearings out by putting the piece in my barbecue and heating it up. 170° has always worked to get the bearing to just pop out. I don't have a press like you to put the new ones in but I leave the bearings in my freezer for an hour or so then tap them in to a warmed up case gently and they go in quite easily. Give it a try next time. Nice video by the way, nice to see the bike come together. I've enjoyed watching and learning from your mods.
Hi Paul- If you ever run out of your favorite epoxy, I have found run of the mill JB Weld to work very well in engines. But there is a trick- use a propane torch to lightly heat the metal to “sweat” out any oils first. Then when the metal is still a bit warm, apply the JB. The heat will make the JB flow slightly and become very smooth. I have used JB in intake ports to reshape them, a very tough environment, and it has held fine. Whereas others like Devcon have peeled loose. FWIW. As always, great show.
I have a copy of a Triumph factory manual which was given to employees only. It states to never heat the case more than 212 degrees. They suggested boiling the case in water. I do it the way you do it. Just thought you mite be interested in that bit of trivia. Great show.RMM
It's worded just as the water begins to boil. Remove case and tap out bearing. You may be correct. I have a pinion if you need it. I think your going to end up with hundreds of them. But let me know. Rob
The Pratley's are my flying friends, they also have a Bell 47.. great guys and excellent adhesives, the only South African product to date that has gone to the moon!
Heat is great for removing bearings from case. Another trick that works well is if you weld a small bit on the bearing race it will shrink a lot from all the carbon and fall out.
I use a toaster oven for smaller parts that need to be heated in a controlled way like the case, it is easier on the part than an oxy/acetylene rig. Most toaster ovens have a heat control that allows you to set the temperature, if you buy a new one (about $20 @ walmart) you can find one that lists the temperature to which it heats on the dial. It is good for heating bearings and other small items, so you aren't likely stink up the oven in the kitchen. You can also heat bearings in the microwave if you are careful to wrap the metal completely with a completely wet paper towel so that NO metal is visible. Do 30 seconds at a time to judge how well the bearing is being heated, then extrapolate from that how much time you need. The water in the paper towel prevents the electron gun from sparking on the metal.
The bearing going into the case with surprising ease, reminds me of nearly everything I do whilst trying to follow 'the instructions'. There always seems to be something disconcerting or unexpected which leaves me with that uneasy feeling that I've either screwed up or have been sold a pup (or both).
Re oil seal in Primary Chaincase a mod in later BSA (same type of engine) Competion Department disregarded this seal and drilled crankcase wall at a level to just allow chain lubrication and used the scavenge on sump to keep level , a benefit was to allow extra volume in Chaincase to help with Engine Breathing to keep oil tight
@@paulbrodie I'd guess the chuffing of a one cylinder crankcase would blow enough oil mist around to keep the primary case wet enough. I still wonder with some amazement at the period of British road racing marques that had open primary chains with no case to keep them lubricated.
70 and on 650 and 750 Triumph twins used the same idea. Seal was removed on main bearing on drive side. Three small holes were drilled just above the lower chain run level to allow oil to drain back to sump. Primary had a breather tube on later bikes to airbox.
@@paulbrodie I guess I'm just spoiled. I know I would be making a lot of gears for my lsr bikes so I bought a small heat treat oven. $350 and I can treat all the gears I want.
Thanks for another wonderful episode! Great trick on smoothing the epoxy out! Thanks! Look forward to each episode, gives me confidence and knowledge to work on my own motorcycles. I think you can temporarily fix the pitting in the gear by brazing it and then carefully filing to the correct profile, just a thought.
Hi Paul as always I enjoy your vids and admit watch them more than once 😅. I recall you described your technique in cleaning aluminium casings and hubs going for the brushed look as I prefer also. Can you share this or point me to the video on it. 🙏
John, thanks for liking our videos. On the Cub engine casings, first I used a file to get all the marks out. Then, emery cloth, finer and finer. 80 grit / 120 / 180 / 240 / 320 / 400. Now comes the Scotchbrite, coarse to fine. It's a lot of work by hand, but better than a buffing wheel, which can be un-even, and doesn't get into all the corners... Good Luck!
if i had a spare timing pinion you could have it free ,t20 parts are getting hard to find Paul, GREAT WORK THO!👍 ( drifting the bearings out looked easy 👍👍😇 )
I used devcon-f aluminium putty the rebuild the crankcase webs in a VW engine. It was good to work with and did a great job allowing a full rebuild on an otherwise scrap engine. The stuff you used looks to be a similar product. Thanks for an interesting video.
Modern epoxies are amazing, just used some Gorilla WELD epoxy to bond a strap I made to an alu BB that had started to crack from the NDS side and it seems to be working a treat.
As somebody who's recently completed a Tiger Cub for trials use, I'm finding it really interesting in some of the modifications you're making and how they're similar/differ from what I've done. Keep up the good work!
Paul, love your videos! I watched you patch the casting where the chain wore a hole. I've used a product you may find useful, Pyro-putty 1000. Not to be confused with a fire starting product with a similar name. It's for aluminum repairs, you mix it with water apply it, let it dry, bake at 160f and you would swear it was welded. Sand or polish with a wire wheel and it looks and acts like metal. McMaster Carr carries it, there is also a version for steel. The stuff is tenacious! Keep up the great work, regards to Mitch
Cool to see you backstopping the thin metal in your re-engineered solution to the counter shaft. Have you considered using an "aircraft adhesive" to join your new plate to the case? There probably are a fair number of suppliers up near you since the NW US is filled with airplane factories.
I am so happy with Pratley epoxy, I have not thought about switching. I have recently learned that Pratley is the only South African company to have their epoxy used on a Moon landing expedition.
Hello Paul, thank you again for another enjoyable video. I was intrigued by your use of an epoxy, I imagined you neatly TIG welding a replacement piece. I wondered whether the expansion of the aluminium may cause the epoxy to loosen over time? I find the way you are so practiced that you make the machining look simple, but I know it isn’t that simple. It’s the mark of a skilled fellow. I look forward to the next video. Best wishes Kevin.
Loved the trick with the the epoxy, I've never seen it used inside an engine before. I hope that you can find a way to keep your sunset views, I see the sunset here in France through my kitchen window, it can be really beautiful when the sky is orange and turquoise. Be a shame if your neighbour spoils that for you.
@@paulbrodie Planning permission in order? Did he get an okay from you, guess the rules are different everywhere but here you need to gat all the immediate neighbours approvals for plans first before you can even submit them to the planning department... Bloody shame when neighbours fuck things up. Neighbour fights rarely ever get better...
I enjoy that your reaction to an unexpected event is “Hmmm” & “ho, ho hum” with an slow inhale. Apart from the skill, attention to detail and workmanship, the lack of swearing in the workshop is the only difference between us.
Hi Paul, a similar product is Devcon Aluminium putty, works well for fixing broken drive chain damage and jigsawing cases back together. Available from Grainger and like suppliers. You may want to consider a case saver if you are concerned about the chain impacting the cases. I have also used Devcon to reshape inlet and exhaust ports and to reshape combustion chambers for squish and swirl. Another step closer to running. Take care.
ideally you want c3 type ball bearings (slight above standard internal play) in a crankcase. there is a tool that produces a knurled surface on the inside of the bearing hole if it is too worn (works half of the time tho), i´d never put bearing glue on a non sealed bearing. i use 309 ss tig rod higher chrome content. take care (sorry i had to edit used wrong term)
@@paulbrodie Thank you for answering and I do too hope all bearings are seated fine. I'm catching up on old videos and this is quite the gold mine. Wishing you nothing but the best on your recovery Paul. Strengh hugs, as we say in Sweden.
I've always heated the case with a torch then turn the case over and a gentle tap on the work bench drops the bearing out, while it's still warm drop your new cold bearing straight in, simple and fast 👍
The war in Donbas has been going on for over eight years and has cost the lives of 15,000 people. Where was your or anyone’s support then? This mainstream media induced virtue signalling is embarrassing. What’s worse is that our taxes are funding the Azov Battalion Nazis that are killing men, women and children in false flag attacks on hospitals and convoys - whilst hiding out in children’s bedrooms in apartment blocks.
I enjoyed your video as always, Paul. However, by putting the epoxy on the case to fix the crack you have done away with the automatic chain oiler that British bikes are famous for…. ;-).
Some heat on that timing side case and that bearing might just fall out. (Just saying, I'm only in about four minutes and will resume now...;-) ....) A bit suspicious that the cam might have some taper worn where it fits in the bushing and a slight channel cut into the bushing might help oil to penetrate, it looks prone to starvation considering it's only splash oiled. In any case, here with ya', Paul, just looking over your shoulder. Always fine work.
Thanks. Yes, not easy dealing with 57 year old cases. I was a little surprised at how easy the bearings went in. Oh well, not a race bike so it should be fine...
Used to do my commando main bearings in my parents rayburn, both crankcases in so the bearings dropped down, you heard them drop onto the wire rack, welding gloves on, new mains in the freezer dropped straight in, sorted. Always denied that I had used the oven, stinking of gunk.😂
I fit a lot of bearings into cases when building Ducati’s, once you drop the cooled bearing into a hot case and things equalise then it should all be good, the annoyance is after a few minutes when you turn the case over and the bearing drops straight out again, usually due to wear in the case! Always a bummer! Lol
Hi Paul, absolutely love you site. Watching your cub rebuild it strikes me there is a real week point at the front fork stem. It looks crazy weak. My question, is, have thought of putting in a gusset where the stem meets the frame to stiffen it up??? just a thought??
I'm surprised you didn't try and make the flag in your milling machine. Maybe your neighbour building his new shop needs a flag too, a Jolly Roger perhaps.
@@paulbrodie I've had the same problem with high density housing being built in my earthquake damaged neighbourhood. I'm one of very few still in a 100+ year old house, close to the city centre, but a bit claustrophobic amongst townhouses and flats, that all seem to occupy just a little too much of their own property. Not to mention the fact there's now 3-4 times as many people/families living in these sections, it does get a little annoying trying to find a window of peace and privacy.
Mr. Brodie, I was just wondering why you decided to use the Epoxy instead of welding the cases? Are they not made of the same aluminum as the cylinder? Not that there is anything wrong with using epoxy I was just wondering. Great video as expected and nice clean engine building, people take note!
These cases are very easy to repair with welding, but oil will be impregnated into the casting, so prep work must be carried out properly. Epoxy repairs on this type of casting, often fail due to the strong vibrations a crankcase is subject to.
@@humourless682 Depends on the kind and quality of the epoxy. I had a Honda 160 with the case cracked from a chain derailment which I repaired with a common epoxy and it lasted for decades until I sold the bike. (Now wish I had it back...).
@@whalesong999 On some broken castings, an epoxy repair will work perfectly. On something like a Tiger Cub crankcase, which is subject to a good deal of vibration, failure of an epoxy repair is very likely. If the damaged part is something like an outer cover, no real issue if an epoxy repair fails. On a crankcase, though, failure will mean, removing the motor and stripping it completely to do the job properly. In this case, an epoxy repair, has saved maybe an hour over welding the case properly.
@@humourless682 Vibration at that spot on the case is not an issue to my senses. I did wonder too why he chose to not weld but he has good instincts and he'll be living with the choice. I've sure had good luck with JB Weld for similar things (I had no access or need to attempt welding). We'll likely never hear another thing about it. In terms of time, I doubt that was even on his mind, he was just enjoying the epoxying more, especially after doing the seat pan fiberglass. Edit: There is some question about the heat generated by TIG welding there. It's a fairly thin spot in the case and warpage is a concern, leading to stress in the part that is more prone to fail than the epoxy might be.
having a TIG at hand I'm surprised you glued the thin crack up : would you comment ? more like a side-of-the-road fix to me... also, imho lacquer thinner (or acetone) does weaken epoxy a bit
Tig welding would probably warp the case, and I did not want that. Epoxy was my preferred choice of repair. Pratley works very, very well on aluminum. I do not consider it a "side of the road fix" at all.
Hey Paul. Great video as always. If you get stuck for a timing gear then you could try “the rocker box” in Farnham England. They have helped me beyond the normal call of duty a few times so I like to try and return the favour by spreading the word. Not sure they have a website or email but you could always call them. Alternatively let me know and I’ll pop in and see them on your behalf. Cheers. Tom. Uk
That loose bearing would keep me awake at night, until I popped it out and used some Loctite 638 to glue it into place. Also, SKF advise that new bearings shouldn't be heated over 110 celcius.
Paul you have a lathe & mill can’t you make a new pinion gear? Or TH-cam machinist Abom79 (Adam Booth) or Steven Summers could possibly replicate the gear.
@@paulbrodie your right of course minumin charge would be 350 or more but I make them out of 4130 or o1 and oil harden them works well for small things.
I didn't realise showing support for another country would be like poking a bear !! there is the option to watch something else if you see something that offends you ..
Thanks for another informative video and thank you for your support for Ukraine. I agree with your support and even if I didn't I would respect your decision enough to stay silent.
@@paulbrodie I am with you Paul about supporting the Ukraine. I am a little surprised that some people were not happy about your support for Ukraine. I am not here to talk about politics and I don't want to with anybody but I thought that you and Mitch making flags was a nice gesture.
@@paulbrodie - OK... I'll keep that in mind, I didn't know what was a good price or not and that did seem a bit high but what do I know. Hopefully we can help you out and find one or two for you.... Maybe we can find someone who makes parts like this for old bikes, I'm guessing it's a machined part that's been heat treated in one of those electromagnetic coils then quenched super quickly so it doesn't harden the contact point. Is that right or am I over thinking it¿? 😅
@@xpndblhero5170 I have a couple viewers looking through their parts right now, so I should have one in a while.. Over 100,000 Cubs were made, so it is not worth the trouble of making one. I am not an expert in how things get heat treated.
@@paulbrodie - Nice, I'm glad you have a bunch of people looking because I'm having no luck... LoL I'm not a heat treating expert either, I just thought it was a part that's had a different heat treating than other parts... Anyway, good luck on the build and I'm looking forward to seeing the finished bike.
What are you, a ‘terrorist’? I am of course joking. Thank you for sharing your honesty. I have Jewish ancestry and my grandfather trained the Jewish brigades that became the Irgun, Haganah and the black hand gangs. But I support the Palestinian people. Peace
That Ukraine flag is a great idea. And I guess you heated up that crankcase half quite a bit more than you realised, because that bearing almost dropped in. Never mind. Hopefully you don't have to take it out and etch the case to reduce the diameter, or use Loctite 641 bearing fit, for example. And I do have some chopsticks. 😎
Oh dear.. please refrain political statements. We're being bombarded with the war all the time now on MSM, and video channels like yours provide a welcome distraction to that. A place to escape the misery created by geopolitics. I know you mean well by making and showing the Ukrainian flag, and I know civilians are the ones who suffer most in any war and deserve our sympathy. I think this fact goes without saying, but flag waving only creates more separation as it divides people instead of uniting them.
@@jakeenvall6377 Yeah, it's really apparent here, quite surprising. Must be a world-wide move on the web. I don't know why he'd disguise the remark "there is no cure for stupidity" aka "ума нет считай калека".
@@arttuk Just dig a little deeper dude, we all should stay out of that bs. Im not saying war is good or they deserve it! You believe some newsmedia that cant even get the weather right and now pick a side because they tell you. Most likely never cared for any county over there. This is a trigger event and we and all need to stay out.
@@bartvanos Sound like you've dug a little too deep, found any tunnel children yet? I live in a country that shares a long border with Russia and in the last few weeks Russia has made several threats towards my country. I think I have a right to be concerned.
@@paulbrodie you are a bit naive there Paul if you think the current conflict in the east is not political and in any case I didn't say that flags are political. Keep up the great work
That is exactly how I feel Ukraine is a puppet government of the US and Putin is doing the west a favour there is so much fake BS coming out of that region.
@@paulbrodie which accomplishes absolutely nothing, other than stoking your own emotions, to lie to yourself about how virtuous you are. But it makes yourself feel good right?
You must have a deeper pain. Perhaps you could elaborate. If you don't or can't, then you're just trolling to squash any sensitivity to what's happening in a country that many in other nations can relate to.
Conspiracists Push Baseless Story of US- Backed Bioweapons in Ukraine - Just saying. Paul deals with specifications and mechanical certainties, not some slanderous shade that has no real place in his comment section.
@@whalesong999 Tulsi Gabbard seems pretty convincing? Personally I find drumming up support for WW3 of great concern, and a central part of that, seems to have to do with ignoring the facts?
@@humourless682 Perhaps if Paul feels it's relevant, his response would bear the most weight. To me, it's inappropriate to introduce a topic that has implications that extend into areas where the conjecture isn't suited to the video's main topic. Ugh, the implications are dire for sure. I was a young boy during WW2 and recall the dread that filled the nation throughout that affair and on into Korea, etc. This is dreadful stuff but, again, it's not topical for this venue. We're likely all dealing with some grief.
@@whalesong999 As the numbers killed are very much greater, I wonder why no one is displaying the Yemini flag? Are brown skinned, terribly poor people, not worthy of our empathy, perhaps?
I guess the great pleasure about living in a truly democratic country like Canada is that we get to choose who and what we support. Everybody has causes they are passionate about.
And here it is. Someone comparing an invasion where tens of thousands have died and millions displaced to a mild inconvenience that was on the verge of being lifted anyway 🤦🏻♂️
A small way to help one Ukrainian, at least, is to check out th-cam.com/video/hX4knBRYPV8/w-d-xo.html - subscribe to his channel, etc. He's an engineer/machinist, who makes all sorts of interesting projects. All of a sudden his house, his workshop, his income, his family - all of a sudden everything torn apart...
Put the cases in the oven at just over 100 deg C until fully heated & let the bearings fall out naturally. On reinstalling the bearings, heat the cases again & put the bearings in the freezer to cool them & they just drop in.
I had a similar bearing, just used a heat gun and a flat screwdriver.
Steel has around half the coefficient of expansion of aluminum. I've taken lots of bearings out by putting the piece in my barbecue and heating it up. 170° has always worked to get the bearing to just pop out.
I don't have a press like you to put the new ones in but I leave the bearings in my freezer for an hour or so then tap them in to a warmed up case gently and they go in quite easily. Give it a try next time. Nice video by the way, nice to see the bike come together. I've enjoyed watching and learning from your mods.
Thank you hotoilhands :)
The luckiest Tiger Cub ever made... Thanks, Paul.
Boy, you said it..!!
Thank you Bill :)
Another enjoyable, informative video with more great camera and editing work.
Thanks Larry.
And the content isn't bad either. 😉
Hi Paul- If you ever run out of your favorite epoxy, I have found run of the mill JB Weld to work very well in engines. But there is a trick- use a propane torch to lightly heat the metal to “sweat” out any oils first. Then when the metal is still a bit warm, apply the JB. The heat will make the JB flow slightly and become very smooth. I have used JB in intake ports to reshape them, a very tough environment, and it has held fine. Whereas others like Devcon have peeled loose. FWIW. As always, great show.
Thanks for the tips.
Mr. Brodie you are the Bob Ross of fabrication. I love your videos, I learn, I get peace in my mind and soul and love your work. Go Ukraine!
The Bob Ross of Fabrication - that's quite true.
Thank you Mario. I watched Bob Ross paint a landscape; he's good!
Enjoyable and enlightening as always. It's good to see someone holding a micrometer properly when measuring.
Thanks Millar.
I have a copy of a Triumph factory manual which was given to employees only. It states to never heat the case more than 212 degrees. They suggested boiling the case in water. I do it the way you do it. Just thought you mite be interested in that bit of trivia. Great show.RMM
Thank you. I was told 200 degrees.
It's worded just as the water begins to boil. Remove case and tap out bearing. You may be correct. I have a pinion if you need it. I think your going to end up with hundreds of them. But let me know. Rob
The Pratley's are my flying friends, they also have a Bell 47.. great guys and excellent adhesives, the only South African product to date that has gone to the moon!
Peter, good stories! I really do like their product :)
Heat is great for removing bearings from case. Another trick that works well is if you weld a small bit on the bearing race it will shrink a lot from all the carbon and fall out.
I use a toaster oven for smaller parts that need to be heated in a controlled way like the case, it is easier on the part than an oxy/acetylene rig. Most toaster ovens have a heat control that allows you to set the temperature, if you buy a new one (about $20 @ walmart) you can find one that lists the temperature to which it heats on the dial. It is good for heating bearings and other small items, so you aren't likely stink up the oven in the kitchen. You can also heat bearings in the microwave if you are careful to wrap the metal completely with a completely wet paper towel so that NO metal is visible. Do 30 seconds at a time to judge how well the bearing is being heated, then extrapolate from that how much time you need. The water in the paper towel prevents the electron gun from sparking on the metal.
Thanks for your tips. I do not own a microwave, and cannot find my toaster oven. Could be time to buy another, seeing as they are inexpensive.
The bearing going into the case with surprising ease, reminds me of nearly everything I do whilst trying to follow 'the instructions'. There always seems to be something disconcerting or unexpected which leaves me with that uneasy feeling that I've either screwed up or have been sold a pup (or both).
Yes, I would have preferred a little tighter fit.
Awesome video Paul, thank you very much. I'll wait until the next one! Regards from Spain!
Thank you Fede. Next video is the start of engine assembly.
Re oil seal in Primary Chaincase a mod in later BSA (same type of engine) Competion Department disregarded this seal and drilled crankcase wall at a level to just allow chain lubrication and used the scavenge on sump to keep level , a benefit was to allow extra volume in Chaincase to help with Engine Breathing to keep oil tight
Aha! The Competition Department got involved.. So they had hole for the oil level, but how would more oil get into the primary chain case on its' own?
@@paulbrodie I'd guess the chuffing of a one cylinder crankcase would blow enough oil mist around to keep the primary case wet enough. I still wonder with some amazement at the period of British road racing marques that had open primary chains with no case to keep them lubricated.
@@paulbrodie thu the open bearing by oil mist and maintaining correct oil level with level hole into the sump,
im'e with U supporting Ukraine 👍
70 and on 650 and 750 Triumph twins used the same idea. Seal was removed on main bearing on drive side. Three small holes were drilled just above the lower chain run level to allow oil to drain back to sump. Primary had a breather tube on later bikes to airbox.
@@alexbowey2760 Thanks for your support Alex. Now I understand about the "mist" and the oil level hole.
Excellent video keep up the good work!!
Thank you Timothy :)
Loving your series on the Tiger Cub! Cheers from Kyiv 🙌 And thanks for your support )
Thanks for liking our Tiger Cub Series. I do support Ukraine 🙂
I would like to see a video of you making the timing gear. I promise to eat only the best ice cream when viewing that video.
I could probably make a gear but how much would it cost to have one tiny gear heat treated? Too much, I think.
@@paulbrodie I guess I'm just spoiled. I know I would be making a lot of gears for my lsr bikes so I bought a small heat treat oven. $350 and I can treat all the gears I want.
Paul, I believe I have a pinion gear you can have . I'll have to dig through a box of parts and see if I have it.
Thank you very much..
Thanks for another wonderful episode! Great trick on smoothing the epoxy out! Thanks! Look forward to each episode, gives me confidence and knowledge to work on my own motorcycles. I think you can temporarily fix the pitting in the gear by brazing it and then carefully filing to the correct profile, just a thought.
If I braze the gear the heat treating will be lost. There are enough Cub parts out there that someone will have one sooner or later.
i can tell you love to play with the torch, but who doesn't!!
Hi Paul as always I enjoy your vids and admit watch them more than once 😅. I recall you described your technique in cleaning aluminium casings and hubs going for the brushed look as I prefer also. Can you share this or point me to the video on it. 🙏
John, thanks for liking our videos. On the Cub engine casings, first I used a file to get all the marks out. Then, emery cloth, finer and finer. 80 grit / 120 / 180 / 240 / 320 / 400. Now comes the Scotchbrite, coarse to fine. It's a lot of work by hand, but better than a buffing wheel, which can be un-even, and doesn't get into all the corners... Good Luck!
if i had a spare timing pinion you could have it free
,t20 parts are getting hard to find Paul, GREAT WORK THO!👍
( drifting the bearings out looked easy 👍👍😇 )
Thank you William.
I used devcon-f aluminium putty the rebuild the crankcase webs in a VW engine. It was good to work with and did a great job allowing a full rebuild on an otherwise scrap engine. The stuff you used looks to be a similar product. Thanks for an interesting video.
Thanks for watching and commenting.
Modern epoxies are amazing, just used some Gorilla WELD epoxy to bond a strap I made to an alu BB that had started to crack from the NDS side and it seems to be working a treat.
Hello from British Columbia Canada.
Lower rainland, close by😁
🇨🇦👍👋♥️
💙💛💙💛
Yes, rain this weekend! Hello :)
As somebody who's recently completed a Tiger Cub for trials use, I'm finding it really interesting in some of the modifications you're making and how they're similar/differ from what I've done. Keep up the good work!
Thank you Conner. Fellow Cub owner!
Paul, love your videos! I watched you patch the casting where the chain wore a hole. I've used a product you may find useful, Pyro-putty 1000. Not to be confused with a fire starting product with a similar name. It's for aluminum repairs, you mix it with water apply it, let it dry, bake at 160f and you would swear it was welded. Sand or polish with a wire wheel and it looks and acts like metal. McMaster Carr carries it, there is also a version for steel. The stuff is tenacious! Keep up the great work, regards to Mitch
Thanks Dan.
Cool to see you backstopping the thin metal in your re-engineered solution to the counter shaft. Have you considered using an "aircraft adhesive" to join your new plate to the case? There probably are a fair number of suppliers up near you since the NW US is filled with airplane factories.
I am so happy with Pratley epoxy, I have not thought about switching. I have recently learned that Pratley is the only South African company to have their epoxy used on a Moon landing expedition.
Hello Paul, thank you again for another enjoyable video. I was intrigued by your use of an epoxy, I imagined you neatly TIG welding a replacement piece. I wondered whether the expansion of the aluminium may cause the epoxy to loosen over time?
I find the way you are so practiced that you make the machining look simple, but I know it isn’t that simple. It’s the mark of a skilled fellow.
I look forward to the next video.
Best wishes Kevin.
Thanks Kevin. Pratley epoxy really is good with aluminum. I have used it for about 20 years, and never had a problem.
Loved the trick with the the epoxy, I've never seen it used inside an engine before. I hope that you can find a way to keep your sunset views, I see the sunset here in France through my kitchen window, it can be really beautiful when the sky is orange and turquoise. Be a shame if your neighbour spoils that for you.
The shop is basically built, and it is HUGE. Evening sun is sometimes the best time of the day. Thanks for watching.
@@paulbrodie Planning permission in order? Did he get an okay from you, guess the rules are different everywhere but here you need to gat all the immediate neighbours approvals for plans first before you can even submit them to the planning department... Bloody shame when neighbours fuck things up. Neighbour fights rarely ever get better...
@@Farlig69 My neighbour seems to be doing everything by the book. I just didn't realize how tall his shop was going to be...
@@paulbrodie shame....
My Norton 750's main bearings drop right into a hot case with no pressing required.
I enjoy that your reaction to an unexpected event is “Hmmm” & “ho, ho hum” with an slow inhale. Apart from the skill, attention to detail and workmanship, the lack of swearing in the workshop is the only difference between us.
I have been known to swear, but not on video.
@@paulbrodie you could release a TH-cam Short, just you to camera, one word! 😁
Hi Paul, a similar product is Devcon Aluminium putty, works well for fixing broken drive chain damage and jigsawing cases back together.
Available from Grainger and like suppliers.
You may want to consider a case saver if you are concerned about the chain impacting the cases.
I have also used Devcon to reshape inlet and exhaust ports and to reshape combustion chambers for squish and swirl.
Another step closer to running.
Take care.
I have no idea of the history of the motor, so do not know how the chain came to doing damage. I have heard about Devcon Aluminum putty, thanks.
You know what they say about chopsticks; You only notice them when you're missing one...
Yaeh brodie time☀️
ideally you want c3 type ball bearings (slight above standard internal play) in a crankcase. there is a tool that produces a knurled surface on the inside of the bearing hole if it is too worn (works half of the time tho), i´d never put bearing glue on a non sealed bearing. i use 309 ss tig rod higher chrome content. take care (sorry i had to edit used wrong term)
Did you ever test the first bearing for play in the case once it's cooled down? I mean the one that went in a bit too easily in the press.
Well, Erik, I have been in hospital for 10 days, and I really can't remember too well, sorry. I hope all my bearing fits are fine. Thanks for asking!
@@paulbrodie Thank you for answering and I do too hope all bearings are seated fine. I'm catching up on old videos and this is quite the gold mine.
Wishing you nothing but the best on your recovery Paul. Strengh hugs, as we say in Sweden.
@@ptz0n Thanks Erik, my Strength and appetite are slowly coming back...
I've always heated the case with a torch then turn the case over and a gentle tap on the work bench drops the bearing out, while it's still warm drop your new cold bearing straight in, simple and fast 👍
That will work if the press fit is not too great.
Best Chanel
Johan, thank you very much!
A BBQ is another quick and controlled way you can heat parts safely instead of using a direct flame.
Great episode as always and great to see you showing support to Ukraine!
Thank you Arttu :)
The war in Donbas has been going on for over eight years and has cost the lives of 15,000 people. Where was your or anyone’s support then? This mainstream media induced virtue signalling is embarrassing. What’s worse is that our taxes are funding the Azov Battalion Nazis that are killing men, women and children in false flag attacks on hospitals and convoys - whilst hiding out in children’s bedrooms in apartment blocks.
Good Morning
Starting the weekend right, watching you two haha
Did you have coffee too?
@@paulbrodie Yes I did, start the every day with coffee. Enjoy your content Paul.
THX
@@dorancoonse3684 Thanks for watching.
All that work on the Tiger Cub make me want to get to work on my Yamaha SR500. As you did, I use to road race the SR500's.
Yes, you should get to work on your SR500.
Nice and interesting work. I am surprised you didn't TIG weld the case instead of using an epoxy to seal it... Thumbs Up!
Tig welding the case applies a lot of heat, which can lead to warpage, and annulment of the aluminum. That would be a last resort.
excellent vid thanks
Thank you.
thanks for another awesome video :)
Thank you Kike :)
I enjoyed your video as always, Paul. However, by putting the epoxy on the case to fix the crack you have done away with the automatic chain oiler that British bikes are famous for…. ;-).
Great point! I will keep that in mind.
Some heat on that timing side case and that bearing might just fall out. (Just saying, I'm only in about four minutes and will resume now...;-) ....) A bit suspicious that the cam might have some taper worn where it fits in the bushing and a slight channel cut into the bushing might help oil to penetrate, it looks prone to starvation considering it's only splash oiled. In any case, here with ya', Paul, just looking over your shoulder. Always fine work.
Thanks. Yes, not easy dealing with 57 year old cases. I was a little surprised at how easy the bearings went in. Oh well, not a race bike so it should be fine...
Used to do my commando main bearings in my parents rayburn, both crankcases in so the bearings dropped down, you heard them drop onto the wire rack, welding gloves on, new mains in the freezer dropped straight in, sorted. Always denied that I had used the oven, stinking of gunk.😂
Another trick is to take the Mig and weld around the inside of the outer race....
At an autojumble at Stratford upon Avon at the weekend and saw plenty of cub parts
I fit a lot of bearings into cases when building Ducati’s, once you drop the cooled bearing into a hot case and things equalise then it should all be good, the annoyance is after a few minutes when you turn the case over and the bearing drops straight out again, usually due to wear in the case! Always a bummer! Lol
Yes, sometimes a little Loctite is the cure for a loose bearing.
Hi Paul, absolutely love you site. Watching your cub rebuild it strikes me there is a real week point at the front fork stem. It looks crazy weak. My question, is, have thought of putting in a gusset where the stem meets the frame to stiffen it up??? just a thought??
Thank you. Yes, the frame looks very weak up front, but don't worry, when the gas tank is bolted in, it becomes a stressed member.
@@paulbrodie I guess I'm just used to old BSAs that are built like tanks. Keep it up, love it Paul.
I'm surprised you didn't try and make the flag in your milling machine.
Maybe your neighbour building his new shop needs a flag too, a Jolly Roger perhaps.
Not happy with my neighbour and his HUGE shop.
@@paulbrodie I've had the same problem with high density housing being built in my earthquake damaged neighbourhood. I'm one of very few still in a 100+ year old house, close to the city centre, but a bit claustrophobic amongst townhouses and flats, that all seem to occupy just a little too much of their own property. Not to mention the fact there's now 3-4 times as many people/families living in these sections, it does get a little annoying trying to find a window of peace and privacy.
@@Metal-Possum Sorry to hear you have similar issues..
@@paulbrodie It happens. I'm just pleased I have a garage to work in while they're all trying to find a parking space on the street.
A drill sharpening video would be much appreciated...please, many thanks
That is in the planning stages. Please be patient!
Another cool video, thanks.
Thank you Ray.
Mr. Brodie, I was just wondering why you decided to use the Epoxy instead of welding the cases? Are they not made of the same aluminum as the cylinder? Not that there is anything wrong with using epoxy I was just wondering. Great video as expected and nice clean engine building, people take note!
These cases are very easy to repair with welding, but oil will be impregnated into the casting, so prep work must be carried out properly.
Epoxy repairs on this type of casting, often fail due to the strong vibrations a crankcase is subject to.
@@humourless682 Depends on the kind and quality of the epoxy. I had a Honda 160 with the case cracked from a chain derailment which I repaired with a common epoxy and it lasted for decades until I sold the bike. (Now wish I had it back...).
@@humourless682 Is it a more difficult weld repair since it's a casting?
@@whalesong999 On some broken castings, an epoxy repair will work perfectly.
On something like a Tiger Cub crankcase, which is subject to a good deal of vibration, failure of an epoxy repair is very likely.
If the damaged part is something like an outer cover, no real issue if an epoxy repair fails.
On a crankcase, though, failure will mean, removing the motor and stripping it completely to do the job properly.
In this case, an epoxy repair, has saved maybe an hour over welding the case properly.
@@humourless682 Vibration at that spot on the case is not an issue to my senses. I did wonder too why he chose to not weld but he has good instincts and he'll be living with the choice. I've sure had good luck with JB Weld for similar things (I had no access or need to attempt welding). We'll likely never hear another thing about it. In terms of time, I doubt that was even on his mind, he was just enjoying the epoxying more, especially after doing the seat pan fiberglass.
Edit: There is some question about the heat generated by TIG welding there. It's a fairly thin spot in the case and warpage is a concern, leading to stress in the part that is more prone to fail than the epoxy might be.
Awesome. 😊
having a TIG at hand I'm surprised you glued the thin crack up : would you comment ? more like a side-of-the-road fix to me...
also, imho lacquer thinner (or acetone) does weaken epoxy a bit
Tig welding would probably warp the case, and I did not want that. Epoxy was my preferred choice of repair. Pratley works very, very well on aluminum. I do not consider it a "side of the road fix" at all.
Hey Paul. Great video as always. If you get stuck for a timing gear then you could try “the rocker box” in Farnham England. They have helped me beyond the normal call of duty a few times so I like to try and return the favour by spreading the word. Not sure they have a website or email but you could always call them. Alternatively let me know and I’ll pop in and see them on your behalf.
Cheers. Tom. Uk
Thanks Tom. I have a couple people searching their spares, and there is a Brit spares guy not too far away, so I just might get lucky!
Another great episode, Ukraine 🇺🇦 👍, I look forward to watching your episodes while having my lunch at my shed
Cheers Chris
Thanks Chris. I do support Ukraine, but apparently, not everyone feels the same way.
That loose bearing would keep me awake at night, until I popped it out and used some Loctite 638 to glue it into place. Also, SKF advise that new bearings shouldn't be heated over 110 celcius.
The case was warm when I put the bearing in. I did not heat the bearings. I think it will be fine. It's not a race bike..
Mr. Brodie is definitely the Mr. Rogers of fabrication.
Thanks Marcos.
Paul you have a lathe & mill can’t you make a new pinion gear? Or TH-cam machinist Abom79 (Adam Booth) or Steven Summers could possibly replicate the gear.
I know gears are out there. They did make over 100,000 Cubs. I could make a gear but the heat treating cost for one tiny gear would be a LOT.
You are turning into Sheldon Cooper with his world of flags.
Just doing what I felt was right.
Ah, yes, "Fun With Flags" with guest, Amy Farrah Fowler. "CUT..!!"
@@paulbrodie had a look for the cam gear here in the UK. Could only find the earlier one with the worm gear on it.
@@chrislee7817 Thanks for taking a look.
👍👍
I'd love to see that DH bike in the background
Look back a few videos! The Story of the 69er!
@@mitchellnurseproductions oh yes, thank you
Just warm the case and the bearing will fall out
If you did a Safety Third t shirt, I'd buy one...
I'll talk to Mitch!
Could'n u use an oven to take the mains out ? Though maybe not the wife's though....
I don't have a wife and it's a long walk up to the house from the shop...
Why epoxy and not welding?
Welding will probably warp the case and lose some heat treating. Using epoxy was my first choice.
Glad to you are both supporting Ukraine. Whilst this is a bike focussed channel, other things are critically important. Well done both.
Thank you Martin.
I disagree, I am sure Paul means well but I come here to watch an engineer at work. This is not the place for political speech.
@@jamesbarrie2458I agree. Leave it out.
worn teeth on gears in the uk i used a hard chromers (fork stantions) to repair some very old un optanadle parts gear etc just saying
I know there's a gear somewhere for me. Pretty hard to fix rust corrosion on a gear...
👍👏👏👏
Sickkkk
Thanks for supporting Ukraine and thanks foray the video 👍.
Thank you!
Time to make a gear
I think a viewer has a spare :)
@@paulbrodie the viewer will have a spare but not as satisfying as cutting a gear especially a spur gear
@@johnpublic168 Yes, I could probably make a gear, but then how much would I pay to get one tiny gear heat treated? It doesn't make sense to me.
@@paulbrodie your right of course minumin charge would be 350 or more but I make them out of 4130 or o1 and oil harden them works well for small things.
10:45 as a software engineer I can't disagree
That was New ?!!!
I didn't realise showing support for another country would be like poking a bear !!
there is the option to watch something else if you see something that offends you ..
Thank you. I really do want World Peace.
Thanks for another informative video and thank you for your support for Ukraine. I agree with your support and even if I didn't I would respect your decision enough to stay silent.
Thank you too!
14 seconds in and I am liking the support for Ukraine.
Thanks Andy. Some viewers weren't happy, but I feel strongly about supporting Ukraine and wishing for World Peace.
@@paulbrodie I am with you Paul about supporting the Ukraine. I am a little surprised that some people were not happy about your support for Ukraine. I am not here to talk about politics and I don't want to with anybody but I thought that you and Mitch making flags was a nice gesture.
@@andyZ3500s Thank you Andy. I didn't want the comments to get political, but have no regrets showing our support.
@@paulbrodie Good for the both of you!
@@andyZ3500s We call them critical thinkers.
Thanks Paul, hey guys, if it was your country, and you lost every thing, you would like some support.
My vote is for World Peace, that's all.
I think there's one on ebay for $299...
That's a little pricey.
@@paulbrodie - OK... I'll keep that in mind, I didn't know what was a good price or not and that did seem a bit high but what do I know. Hopefully we can help you out and find one or two for you.... Maybe we can find someone who makes parts like this for old bikes, I'm guessing it's a machined part that's been heat treated in one of those electromagnetic coils then quenched super quickly so it doesn't harden the contact point. Is that right or am I over thinking it¿? 😅
@@xpndblhero5170 I have a couple viewers looking through their parts right now, so I should have one in a while.. Over 100,000 Cubs were made, so it is not worth the trouble of making one. I am not an expert in how things get heat treated.
@@paulbrodie - Nice, I'm glad you have a bunch of people looking because I'm having no luck... LoL
I'm not a heat treating expert either, I just thought it was a part that's had a different heat treating than other parts... Anyway, good luck on the build and I'm looking forward to seeing the finished bike.
Show us how to make a flag on the lathe!
I don't know how to do that!
THX 🇺🇦
Most welcome.
Try I support Palestine
What are you, a ‘terrorist’?
I am of course joking. Thank you for sharing your honesty. I have Jewish ancestry and my grandfather trained the Jewish brigades that became the Irgun, Haganah and the black hand gangs. But I support the Palestinian people.
Peace
I live in Ukraine 🇺🇦. Thanks
Thank you.
nice
That Ukraine flag is a great idea. And I guess you heated up that crankcase half quite a bit more than you realised, because that bearing almost dropped in. Never mind. Hopefully you don't have to take it out and etch the case to reduce the diameter, or use Loctite 641 bearing fit, for example.
And I do have some chopsticks. 😎
Thanks Andy.
I can't find anything to make me show support for either belligerent.
Let's just vote for World Peace.
@@paulbrodie That'll do.
Oh dear.. please refrain political statements. We're being bombarded with the war all the time now on MSM, and video channels like yours provide a welcome distraction to that. A place to escape the misery created by geopolitics. I know you mean well by making and showing the Ukrainian flag, and I know civilians are the ones who suffer most in any war and deserve our sympathy. I think this fact goes without saying, but flag waving only creates more separation as it divides people instead of uniting them.
I just want World Peace. Is that something that appeals to you?
еще одна жертва пропаганды лживых СМИ
Russian troll farms have made their way to Paul’s channel 🤣
@@jakeenvall6377ума нет считай калека
@@jakeenvall6377 Yeah, it's really apparent here, quite surprising. Must be a world-wide move on the web. I don't know why he'd disguise the remark "there is no cure for stupidity" aka "ума нет считай калека".
Should leave politics and war out of this here. Both sides are bad. Keep out of it.
Both sides are bad? As in Ukraine is bad for standing up to invaders?
@@arttuk Just dig a little deeper dude, we all should stay out of that bs. Im not saying war is good or they deserve it! You believe some newsmedia that cant even get the weather right and now pick a side because they tell you. Most likely never cared for any county over there. This is a trigger event and we and all need to stay out.
I just want World Peace. Is that something you would vote for?
@@bartvanos Sound like you've dug a little too deep, found any tunnel children yet? I live in a country that shares a long border with Russia and in the last few weeks Russia has made several threats towards my country. I think I have a right to be concerned.
@@paulbrodie naturally I want the same
Down vote for bringing politics into your video. Don’t be stupid, stick to what you know.
My vote is for World Peace. That is what I know. I am not trying to politicize our channel.
Keep flags and politics off your show please Paul, stick with the bikes
I don't believe that World Peace is a political issue.
Politics?! Are you behind the iron curtain?
@@paulbrodie well said Paul.
@@paulbrodie you are a bit naive there Paul if you think the current conflict in the east is not political and in any case I didn't say that flags are political. Keep up the great work
That is exactly how I feel Ukraine is a puppet government of the US and Putin is doing the west a favour there is so much fake BS coming out of that region.
Care to explain how your $1.75 is going to do anything for anyone?
It shows that I care about the world and humanity.
@@paulbrodie which accomplishes absolutely nothing, other than stoking your own emotions, to lie to yourself about how virtuous you are. But it makes yourself feel good right?
You must have a deeper pain. Perhaps you could elaborate. If you don't or can't, then you're just trolling to squash any sensitivity to what's happening in a country that many in other nations can relate to.
@@whalesong999 I agree 100%.
@@EitriBrokkr If that's really how you feel, you have obviously tuned into the wrong channel.
Maybe there would have been no need to make flags, had the US not have decided to have funded 30 biolabs within Ukraine?
Conspiracists Push
Baseless Story of US-
Backed Bioweapons in Ukraine - Just saying. Paul deals with specifications and mechanical certainties, not some slanderous shade that has no real place in his comment section.
@@whalesong999 Tulsi Gabbard seems pretty convincing? Personally I find drumming up support for WW3 of great concern, and a central part of that, seems to have to do with ignoring the facts?
@@humourless682 Perhaps if Paul feels it's relevant, his response would bear the most weight. To me, it's inappropriate to introduce a topic that has implications that extend into areas where the conjecture isn't suited to the video's main topic. Ugh, the implications are dire for sure. I was a young boy during WW2 and recall the dread that filled the nation throughout that affair and on into Korea, etc. This is dreadful stuff but, again, it's not topical for this venue. We're likely all dealing with some grief.
I believe there are something like 4000 I thought there was just a few as well.
@@whalesong999 As the numbers killed are very much greater, I wonder why no one is displaying the Yemini flag? Are brown skinned, terribly poor people, not worthy of our empathy, perhaps?
Where was Paul Brodie's support for the truckers?!!!!
I guess the great pleasure about living in a truly democratic country like Canada is that we get to choose who and what we support. Everybody has causes they are passionate about.
THAT's an issue???
And here it is. Someone comparing an invasion where tens of thousands have died and millions displaced to a mild inconvenience that was on the verge of being lifted anyway 🤦🏻♂️
Canada democratic you are kidding.
@@jamesbarrie2458 I am trying my best to be optimistic in these confusing times.
A small way to help one Ukrainian, at least, is to check out th-cam.com/video/hX4knBRYPV8/w-d-xo.html - subscribe to his channel, etc. He's an engineer/machinist, who makes all sorts of interesting projects. All of a sudden his house, his workshop, his income, his family - all of a sudden everything torn apart...
👏👏👏👏👏🇪🇦🇺🇦
Thank you :)