How to make a pushrod tube // Paul Brodie's Shop

[@1963corvette327]

Wow, Very Relaxing to Understand and Watch You Are one crazy Man, Mr Paul, You Never Sise to Amaze Me And the millions that Follow..Your Family, Are Very Blessed...Thank you For Sharing Your Knowledge, and i may seem To Gush, It's Just That You and Your Presence And mannerisms, are such Resemblances of the times i spent with My Grand Farther..but remember, I'm in the mind of 6 at the time....Be Well..All The Best...

[@paulbrodie]

Dell, thank you for watching and commenting. We appreciate it 😉

[@danburby7936]

PAUL,WHEN I WAS 15 I TRADED A 22 RIFLE FOR A TERRIER 150,BASKET CASE..WITH THE HELP OF MY DAD WE GOT IT ALL BACK TOGETHER AND IT WOULDNT START,WE HAD PUT THE PUSH RODS IN THE WRONG TAPPETS,FINALLY WE FIGURED IT OUT AND I RODE IT FRO SEVERAL YEARS,TILL I GOT A CUB,WHICH I MADE A WATER COOLED BARRELL AND USED A 650 PISTON TO MAKE IT A 250,GREAT LITTLE BIKE..NEVER EVEN HAD A RADIATOR,JUST TWO HOSES LEADING TO A SMALL TANK NEAR THE LITE,NEVER OVERHEATED..IM 86 NOW AND STILL RIDE MY HUSKY 150 EVERYDAY,WEATHER PERMITTING..YOUR VIDEOS BRING BACK SOME GREAT MEMORIES

[@paulbrodie]

Hey Dan, That's a great story on modifying your Cub. Never heard that one before... The world has changed a lot, so I am very happy that I got raised in the 60s and 70s, because, for me, that really was the Golden Age of Motorcycling!

[@Farlig69]

17:11 Wow!!! Not only a lathe guru but a ventriloquist too!!!!

[@paulsto6516]

Good show. Thanks for having us in.

[@paulbrodie]

Thanks for hanging out in our shop!

[@larrypalmer7136]

That has to be the best looking Tiger Cub engine that ever existed, some of the best camera work too; great lathe shots.

[@paulbrodie]

Larry, thanks from both of us!

[@Timoteo53575]

Got my 1st Cuppa, a late start. Now I’ll sit back and learn some tips and view some highlights. Life is good, especially when these VIDs are accessible inside on a chilly crisp morning.

[@paulbrodie]

Tim, thanks for watching and commenting.

[@Sapnek]

Thank u for letting us hang out in your shop with you

[@paulbrodie]

Our pleasure! Let's do it again!

[@malcolmcavalier7849]

After seeing all the comments about the length of the pushrod tubes, I had to go look at my Tiger Cub parts catalogs. The T20 uses an E3537 pushrod tube , even after the redesigned head and cylinder were introduced. The T15 (Terrier) used the tubes with the pushrod guides in them. (E3536) I would think that the tubes that you got in the pile of parts are not T20 parts. Your solution for the problem looks amazing , it makes this cub engine very easy to identify as "yours". I really enjoy this series and look forward to the upcoming videos.

[@paulbrodie]

Thanks Malcolm. I figured it out, as you will see on Saturdays video. Those two pushrod tubes I have fit the oval head / barrel. But I am using the square head / barrel, which needs a pushrod tube approximately 3/16" shorter. Pretty simple, eh?

[@blairguinea6811]

Love your expertise Paul..............just a Maestro , good camera angles Mitch, thanks guys as ever ...............if I lived in the USA, Id love to buy you both coffee

[@paulbrodie]

Thanks Blair. It doesn't matter where you live in this world, you can still buy us coffees. Mitch and I live in Canada, eh? 😉

[@margueritemitchell1829]

Hello from British Columbia Canada Neighbor...🇨🇦👋👍♥️🌞😎

[@paulbrodie]

Hello Neighbour :)

[@MotoDeSoto]

I like the blue sharpies. To each his or her own. 😎

[@djokicmetamora]

So glad I found your channel! Early 71 Daytona owner.

[@paulbrodie]

Thanks for hanging out in our shop!

[@petepure3387]

Loveliest Push Rod tube ever! :)

[@paulbrodie]

Thank you kindly!

[@h-j.k.8971]

I love that you allways speak proper grammer "Mitch and I"

[@paulbrodie]

I guess I was raised proper, British style...

[@h-j.k.8971]

@@paulbrodie "smashing" British style, yes I remember.

[@hrxy1]

superb camerawork excellent vid thanks

[@paulbrodie]

That Mitch... He just keeps on getting better!

[@freiheitfur2takte354]

der Motor ist ein echtes Kunstwerk geworden. Ich liebe es, wenn ein Motor fertig ist. Nur wird ein Außenstehender nie sehen wieviel Arbeit darin steckt. Sehr gute und saubere Arbeit 💪👍😃

[@paulbrodie]

Thanks for watching!

[@jimurrata6785]

That Cub engine sure turned out a little gem! 💎 I hope you get to show the bike in action on a later episode Paul. Thanks, both Mitch and Paul for having us along on the adventure. 😉

[@paulbrodie]

Thanks Jim. Yes, we will fire it up when the time is right :)

[@michaelfirth1075]

Great video PAUL, THANKS.

[@paulbrodie]

Thank you Michael.

[@billyjo1148]

Really accentuated the inherent beauty in these triumph engines

[@paulbrodie]

Thank you.

[@johnb5519]

Well done as usual.

[@paulbrodie]

Thanks John.

[@tomfortson2684]

Great episode Paul & Mitch!

[@paulbrodie]

Thank you Tom.

[@tomfortson2684]

Hey Paul, just enjoyed your episode on the finned point cover, but couldn’t get a comment logged. Kept bouncing back to other videos when I clicked the comment text box. Strange. Anyway, I really liked watching your machining! The new plug filler looks great. Especially how well it fits! And the two custom screw drivers are great! No notching the plug cap!

[@paulbrodie]

@@tomfortson2684 Thanks Tom, I have no idea on the comment bouncing. Ask me a shop question! Yes, we had fun filming the points cover episode :)

[@deangiacopassi1951]

Wow, that was a high aspect ratio hole you drilled for the pushrod tube. I was guessing that you would make a 3 piece pushrod tube or spin form one out of tubing. Thanks for showing the machining work.

[@paulbrodie]

Thanks for watching :)

[@alex4alexn]

cant wait to hear her run! awesome episode!

[@TheOldaz1]

Engine looks beautiful. All the cleaned up AL looks great. Pushrod tube sets it off nicely, looks like it's supposed to be like that. Thanks Paul.

[@paulbrodie]

Thank you very much!

[@matthewsmith6486]

I love how this little gem turned out! Between the fin repair, the trap door, the ignition upgrade, the push rod tube, the exhaust repair, the intake improvement, and all that polishing, it has to be, just has to be, the worlds most beautiful Triumph Cub engine! I just can't wait to see the whole motorcycle all put together! I'll bet you can't either!

[@paulbrodie]

Thanks Matthew. Very nice comment. All we need now is a finned points cover... next episode!

[@ragnarironspear1791]

Beautiful craftsmanship

[@paulbrodie]

Thank you!

[@JasonSimonSmith]

My goodness !! The engine is STUNNING Paul ! Cheers !

[@paulbrodie]

Thank you Jason.

[@johnhenke6475]

I rebuilt one of these engines when I was in high school. Even got it running.

[@ianaristotlethompson4186]

Cracking job. You may find the seals need wedding bands around them to stop them squeezing out. My sharpie is Blue.

[@philmuskett265]

A masterpiece, mate. You've got the patience of Job. I'm afraid the air around me would've been blue. Well done.

[@paulbrodie]

Thanks Phil. Little Cub is finally taking shape :)

[@leslieaustin151]

In my opinion, that push-rod tunnel looks better than the original one. Nice work again, thank you. Les in UK

[@paulbrodie]

Thank you Les :)

[@jimanderson4981]

Good job Paul👍!

[@paulbrodie]

Thanks!

[@stan5513]

I chuckled at the Lodge plug. I haven't seen one since my brother drove a Hillman Minx.

[@paulbrodie]

Not everyone has a Lodge plug!

[@philipspencer1834]

Excellent work Paul. I grew up with these bikes and their engines NEVER looked that good 😎👍

[@paulbrodie]

Thank you Philip.

[@thomaswik5842]

Excellent work. 😊

[@paulbrodie]

Thank you Thomas!

[@markmetzger5430]

Being an ordinary bodger, I am partial to blue sharpie :) Nice work as always Paul and Mitch. You are a remarkable craftsman Paul and a great inspiration.

[@paulbrodie]

Awesome! Thank you Mark.

[@billdyke9745]

A thing of beauty is a joy forever... Looking very good indeed, Paul. And no need to apologise for an extra installment. What is it they say? Measure twice, cut once and then cut again? It's always worked for me...

[@paulbrodie]

Thank you Bill :)

[@gman3725]

I love the brushed finish. Thanks for sharing the video.

[@paulbrodie]

Thanks for watching!

[@derekcollins1972]

That is one pretty little engine. Thanks for keeping the Amal carburetor. I'm sure it will work a treat.

[@paulbrodie]

Yes, I have received flak for my choice of carb..

[@tinymotogarage]

Pro-level as always. Would love to see a Millyard engine in a Brodie frame - painted black and red :-) Bought my first welder today so am catching up - only 250 more years to go ...

[@paulbrodie]

Perhaps Allen and I will meet someday; I have no idea. That's great you have a welder now. Practice, practice!

[@glenn5ft19]

PS After watching you do some turning I ordered a tool holder and package of round inserts.

[@paulbrodie]

I don't use round inserts a lot, but sometimes they are very handy, and the surface finish is good.

[@glenpiro313]

Awesome Paul. Cant get enough of this

[@paulbrodie]

Thanks Glen. It is a fun project!

[@MegaTubescreamer]

a spanner like that is an absolute treasure, ! you did a fine job on the pushrod tube Paul despite a couple of jink`s and the odd sidestep. nice to see it looking whole.😊👍👍

[@paulbrodie]

Thanks William. Yes, it wasn't all smooth sailing like I had imagined.

[@bigbird2451]

Allan Millyard is quite a bit of fun to watch. I'm subscribed to you both.

[@paulbrodie]

I subscribed to Allen Millyard too. He uses a black Sharpie.

[@robertholcomb6200]

Nice work as always. That was a good fit! Glad you got it out afterwords.

[@paulbrodie]

Thanks Robert 👍

[@jeolman1]

I would love to see both you and Allen Millyard get together and collaborate on something. that would be just so awesome.

[@westho7314]

Millyards little Honcati twin is a marvel. what a sound.

[@paulbrodie]

I've heard of that guy. I think he's into motorcycles too!

[@johnpublic168]

Great case finish adds a elegant touch. The push rod tube looks so much better than that chrome push rod tube made all the diff.

[@paulbrodie]

Thanks John 👍

[@xpndblhero5170]

16:45 - I have an old socket extension that I turned into one of those by drilling a cross hole through the end the socket wrench would attach then I'd use a screwdriver or Allen wrench to turn it... I made it for working on BMX bikes but it comes in so handy in all kinds of situations, I've had it for a long time and I'd love make more using different lengths so I have options. Great video and as always great camera work as well.... Keep it up guys, you are doing a fantastic job. 😁👍

[@paulbrodie]

Thank you very much :)

[@JR-bj3uf]

I want a couple of hand made pushrod tubes for my "66 T100. The OEM tubes are less than precision items.

[@jamest.5001]

I use blue and purple sharpies! 😆

[@DarrylBoorer-n6f]

Looks fantastic 🤙🤝

[@pbysome]

looks nice, that rocker feed gives it a Ducati look somehow. for assembling those tricky pushrods, a drop of oil in the bottom cups stops the rods coming out and grease at the top plus some elastic bands around the rockers keeps tension on whilst you tighten it down, makes the job easier.

[@paulbrodie]

I did oil the contact points. And I have heard of using elastics!

[@pbysome]

@@paulbrodie oil in the bottom grease in the top.

[@paulbrodie]

@@pbysome Yes, I did understand your comment, thanks.

[@243jimb]

As I recall, the bottom black seal slid up into a recess in the pushrod tube which held it in place. Hopefully, it will not buckle and leak without it. The original tube also had a pip that lined up with the one cast into the head. I couldn't see if there were thick washers under the head nuts. Really nice machining work.

[@paulbrodie]

Thank you. You are right about the recess. The o-ring didn't really want to fit in there. I had (2) black 0-rings and they were slightly different. Quality!

[@jarnosaarinen4583]

Thats a nice quite lathe!

[@paulbrodie]

I've had it many years, but I do want a better one. It's on my wish list :)

[@jaratt85]

*sigh I miss welding and machining things.. I started welding in high school at 16 and found it to be one of two places that I've felt like I was doing what I'm meant to, the other I discovered in college and that's doing autobody/paint. While I love making things, my autism does tend to get in the way with machining as I can tend to take measurements I don't really need and then make the part to fit that measurement and completely ruin it.. and that'd never fly in a shop and be expensive at home, and worse at that point I get really frustrated with myself and end up quitting.. it's what happened when I took beginner machining. My back issues and IBS keep me from being able to work period though. I wish I could work at home but money is the massive hurdle. It really sucks to have a ton of knowledge and cool ideas but no way to make any of them a reality... and I am a really good welder and bodyman and a pretty decent painter. The little nicks in the part are common when using a tool steel cutter, it's caused by slight deflections in the cutter. My teacher told me the only way to get rid of them is to use a rounded nose cutter and it'll take them right off. (or you could use emery cloth or sand paper and polish it out but he didn't want the grit to get into the ways of the lathes)

[@paulbrodie]

I think there is always a way to make ideas into reality. If you think there is no way to turn your ideas into reality, it won't happen. You have to believe you can do it, and then you find a way.

[@andyZ3500s]

The pushrod tube is looking good. I'm getting excited about seeing the cub come together. It was hard to see if the 6061 was tearing or galling. A insert with a slightly sharper edge or hss might work better on material that is giving you problems like that. Just a guess!

[@dennisyoung4631]

Perhaps apply a light oil, to prevent the aluminum picking up on the cutter? I’ve had some issues with this happening on aluminum when using both HSS and Carbide, and a mix of Marvel Mystery Oil and Charcoal lighter seems to help. Yup, seeing some buildup on that long boring bar’s tip. Dousing with a light oil will help.

[@paulbrodie]

I was using cutting oil..

[@paulbrodie]

I think the tempering was not quite T6. That's my guess...

[@allenm00]

I love your videos. You do make me nervous each time you work close to the lathe chuck while wearing long sleeves though. Oh, I had live captions turned on and noticed your lathe says "uh" and "" um". Lol

[@paulbrodie]

Thanks! I had no idea my lathe was talking behind my back.

[@andrewslade7867]

My old Tiger Cub always used to leak from the pushrod tube, no matter what I tried to fix it, including red hematite gasket sealant. My dad said it was a design feature to stop rest of bike from rusting. Just needed to keep an eye on the oil level in oil tank to combat losses.

[@paulbrodie]

Andrew, your father was probably correct. Made me laugh, anyway. Thanks for watching.

[@peterduxbury927]

Hi Andrew, Just like you, I owned two Tiger Cubs when I was 16/17. I had the same issues as you, leaking oil from around the Pushrod Tubes. Also, leaking oil through the Crankcases. I couldn't keep those cases tight, and they always came loose. Cross Head Screws were changed (later) to Allen Head, and (just like you) Red Hermetite was used in an attempt to seal them up! All to no avail. When small Honda Twins came along, like the 175 Twin, I purchased one of these. No vibration (like the Cub). No oil leaks. Always started and ran really well. I used to thrash the Honda Twin everywhere I went, to try and break it. I was impressed with the Honda. To me, I spent more time pushing the Tiger Cub - than riding it. The name Tiger Cub is a swear word to me, and I see it as a lost cause. No matter how good the engine or whole Bike looks, it could never out-perform a Honda, on speed or reliability.

[@jeffwiegers5740]

Hi Paul.I’m in the process of doing a complete assembly of a 250cc t25. Do you think the tiger cub videos will be helpful in doing this? Also are there any books or Manuel’s that would be helpful. I really enjoy your videos.thanks Jeff

[@paulbrodie]

Jeff, I have never seen or worked on a 250cc T25, so I have no idea if these videos will be helpful. A T25 manual would probably be helpful. Thanks for watching!

[@tonypeters8298]

I l9ve the expression of delight when things work, "oh, look at that". Great videos, a pleasure to watch and learn. Thank you. Cheers Tony (Downunder)

[@paulbrodie]

Thank you Tony, much appreciated!

[@tomtruesdale6901]

Outstanding machine work on the pushrod tube. Could you have chucked up the stock one in the lath and trimmed off a bit from both ends till it fit?

[@paulbrodie]

Thanks Tom. No, the stock pushrod tube is made from formed steel, and is not well made. There is not enough metal to trim it down. Aluminum is a better material for this.

[@tommytom2065]

Caro Paolo così bello non usciva dalla fabbrica neanche ai suoi tempi 😁 complimenti un lavoro magnifico 👍🥰Tommaso da Roma

[@paulbrodie]

Thanks for watching :)

[@sparetimedev]

Thanks for all the work you guys put out! I really enjoy the channel.

[@paulbrodie]

Thanks for watching!

[@Vikingman2024]

The new push-rod tube looks much better! Why was the old one too long, different model or year of engine? Are castings of the head and crankcase still available?

[@paulbrodie]

Thanks William. The length is a mystery. I did buy a lot of used parts. Someone said it's a BSA C15 part? You can find used heads and crankcases. New castings? Probably not.

[@lynxg4641]

Well now, that's a nice looking tube, well done. I've learned a lot about motor cycle/small engines watching this series, thank you. You must know how much most tinkerers watching this envy your workshop and all the tools and the ability to fabricate things you need like that, so cool. So, my Paul Brodie question...What's Paul's favourite tool? The Persuader :-)

[@paulbrodie]

Thank you very much! Yes, I am "fortunate" to have a good shop, but I worked hard for it. What's my favourite tool? I'm drawing a blank right now, sorry.

[@marshalmercer594]

Another very nice video. Thanks. I was never able to get a WEBCO, fined oil feed, to seal properly. The too soft aluminum deformed when the acorn nuts were tightened enough to hold oil. I went back to the stock piece to assure sealing. Although this does not apply to your model-year, I used Bendix, or Joe Hunt magnetos to provide spark; the Energy Transfer windings unraveled -- unless epoxy dipped. By comparison, your ignition setup looks terrific.

[@paulbrodie]

Thank you Marshal.

[@ОлександрФедосєєв-ц3х]

Nice, thanks! Mitch, can you share with the tools and equipment you use for filming Paul?)

[@mitchellnurseproductions]

I use a Fujifilm XT4 with the 16-55mm f2.8 and my iPhone 11 on a gimbal. Rode Wireless Go and VideoMic NTG for audio 👍

[@ОлександрФедосєєв-ц3х]

@@mitchellnurseproductions thank you Mitch!!!)

[@mitchellnurseproductions]

@@ОлександрФедосєєв-ц3х no problem!

[@Chinamus1551]

Love your enthusiams and machining skills but where do you draw the line where you stop renovating and start constructing a new product? Maybe there is a difference between renovation old bikes and building racers? I might have misunderstood the projec.t.? Anyway I have somewhat similar problem when tuning. Why start from som older crap and spend excessive money to achieve what they make cheaper and better today?

[@paulbrodie]

Thank you Grogg. I have been pretty clear on this project that it is NOT a restoration... I am just building the Cub that I want. No, it's not stock, but it sure looks like a Cub. And I am enjoying this project.

[@thomaslawry5238]

Lovely work.... That pink Lodge keeps catching my eye. Is it new?

[@paulbrodie]

Thank you Thomas. That is a used Lodge plug. I'm not sure why I like it so much!

[@thomaslawry5238]

@@paulbrodie It looks period perfect for your beautiful Tiger Cub! When I was young we had a 1920s ATCO Villers reel lawn mower (exact same as Alan Millyards) which came with Pink Lodges in 18mm thread as well as three piece sparkplugs which could be taken apart for cleaning...

[@paulbrodie]

@@thomaslawry5238 Thanks Thomas. Yes, I have a small box of the 3 piece sparkplugs. I bought them at the Davenport antique swap meet years ago, and I use them in the Excelsior V-twins that I make.

[@Dave.Wilson]

I cant wait for part 5, 6 and 7 of the engine build!!, Seriously though, it's looking jolly fine, My B44 looked good when I built it 8 1/2 years ago, looks not so pretty now though.

[@paulbrodie]

Thank you David.

[@Rafael-xy5ti]

you´re are a master

[@paulbrodie]

Thank you Rafael :)

[@PatFarrellKTM]

Another nice video. Amazing how large that 5/16" Whitworth wrench is. Does the 5/16" mean the bolt diameter? And the need for a customized wrench to fit onto the bolt is another sign of the Cub's amazing engineering.

[@paulbrodie]

Thanks Pat. Yes, a 5/16" wrench will fit the nut or head of a 5/16" bolt. Yes, you are correct about the "amazing engineering" on a Cub.

[@johnhenke6475]

I had a whole set of whitworth sockets and end wrenches and they never made any since to this Yankee. But they worked on Triumphs Norton's and BSA.

[@2003ep]

How are the valve guides retained in the triumph T20 head? Does the C clip go into a groove on head and guide? I could not find this in any of your videos. Thanks for any help.

[@paulbrodie]

The valve guides are a press fit. I had a friend do it for me. I don't have all the tools for headwork. There is either a circlip or a shoulder on the actual valve guide. Hope this helps....

[@2003ep]

@paulbrodie thanks... my exhaust guide fell out and I pulled the intake out with a tool I made.

[@paulbrodie]

Sounds like you need a good head specialist. Good luck!

[@The9meister]

Hi Paul, great shop work, did you know Allen Millyard is a nuclear engineer, motorcycles bring us all together.

[@paulbrodie]

Thank you. Yes, Allen Millyards' name keeps popping up for some reason. Must be the motorcycle connection!

[@ccbproductsmulti-bendaustr3200]

Looking the goods Paul 👍👌👏Cheers Chris

[@paulbrodie]

Thanks Chris 👍

[@nigelglover2296]

Hi Paul, I think you have BSA C15 pushrod tubes there 😀.

[@paulbrodie]

You might be right. I got 2 frames, 4 motors, and a bunch of stuff, mostly in rough shape...

[@JustinG1962]

I always use red...great minds! The pushrod tube looks far cooler in aluminium btw.

[@paulbrodie]

Thank you. I agree that Red Sharpies are THE way to go..

[@IanFrancisco-CAPianoman]

Beautiful work but why was a shorter pushrod needed in the first place? Why didn't the stock size fit?

[@paulbrodie]

I switched to the "square" head and barrel, and for that combo, a shorter pushrod tube is required. No one told me. The manuals never mentioned it either.

[@trevorlock642]

A small suggestion for the lathe segments - when the film is sped up, could there be an indicator of the film speed (i.e. 1.5 X, 2.5 X, etc)?

[@mitchellnurseproductions]

I can do that. Sometimes it’s 2x and sometimes it’s 4x.

[@philipbarrett3151]

"It has no bearing, it just is"" - Zen from the Master.

[@fitzymagee7469]

Damn Chinese made 6061, they didn't put enough coffee in the mix when making it. Nice work as usual Mr Assemblicator.

[@paulbrodie]

Thank you.

[@Stephenbie]

Hi looking good enjoy watching your videos, how did you get the finish on the side covers looks real good and is there a clip of it look like I missed that one ?

[@paulbrodie]

Side covers: file to match, then emery- 80, 180, 320 grit. Coarse scotchbrite, fine scotchbrite, Solvol metal polish. Sore fingers! Thanks for watching.

[@Stephenbie]

Feel your pain

[@derekgee8504]

What a beauty

[@paulbrodie]

Thanks!

[@christianheidt5733]

Very cool, are u going to clear anodize the push rod tube?

[@paulbrodie]

I think I'll just leave it so it can "age" with the rest of the motor.

[@whalesong999]

I'm interested in just what Cub engine those oem tubes fit. Was that head a factory match for the 'square' cylinder? Maybe you could mock up another engine from parts to find out just what combination those push rod tubes fit.

[@paulbrodie]

Someone said they looked like BSA C15 pushrod tubes. Could be another of life's unsolved mysteries...

[@davidprocter3578]

peacock Paul !! but where's your hedgehog?

[@paulbrodie]

I do not have a hedgehog..

[@gregm1457]

Love the round carbide insert tooling- just got a couple examples to try out having seen a few youtube machinists use them- profiling with the triangular inserts is a bit of a pain. Do you prefer the larger or smaller rounds? I was thinking smaller sizes to make a smaller radius on inside corners- but maybe the larger ones win other ways?

[@paulbrodie]

I don't prefer one over the other. The different sizes have their own uses. The radius you make with them is always slightly larger than the radius of the tool, otherwise you will probably get chatter in the finish. Thanks for watching.

[@Flatout56-o8k]

You should make some nice Allen t wrenches!

[@paulbrodie]

In my spare time?

[@Flatout56-o8k]

@@paulbrodie yea, there is some guy on yt that made them in Ti

[@paulbrodie]

@@Flatout56-o8k Now that sounds like complete overkill. Why would anyone do that? :)

[@Flatout56-o8k]

@@paulbrodie I don’t really know lol, same with people using ti bolts on aluminum engines, see it all the time, threads would rip out our get torn up just by using them

[@elffirrdesign2063]

Beauty!

[@wheater5]

My BSA C15's pushrod tube needed it's white, square section O ring at the top to be pushed inside the head casting aperture or it also appeared to be too long. I was just hoping that you didn't already have the correct length tube because it looks like the white O ring wasn't pushed in far enough...

[@paulbrodie]

I have about .040" squish for the (2) o-rings. Pushrod tube seems to be working.

[@wheater5]

@@paulbrodie Great stuff….it looks better than standard, too! 😎

[@glenn5ft19]

Hi Paul I worked with a guy who had worked as a machinist all his life. He told me to never wrap the emery strip around the workpiece like you did. He said if it ever grabbed it would pull your thumb in and rip off the nail. He suggested holding the emery between your index finger and thumb of your right hand and then use your the index and second finger of your left hand to hold the paper against the work. If anything happens you just release the paper from between the index and thumb. Not being picky about your work practices just a suggestion.

[@paulbrodie]

I always keep my fingers back, so there is some slack, then it can't grab. If you hold it close to the spinning piece, that could be a problem! Thanks for your concern.

[@tonylai3565]

Good job 👍

[@paulbrodie]

Thank you! Cheers!

[@jacobburges1374]

13:17

[@bradley3549]

Looking real good! I've found using a very sharp insert makes a lot of difference with aluminum surface issues like you were experiencing. Something with a high positive rake and polished. Though I usually prefer to cut dry when I can as well (hate the mess) a little aluminum tap magic or WD-40 can really improve those surface imperfections.

[@paulbrodie]

Thanks Bradley! I don't usually have surface finish issues, but the metal shop has been dealing with substandard 6061, so there is a problem somewhere with QC...

[@bradley3549]

@@paulbrodie I like to buy mystery metals from scrapyards and Ebay, so I've learned to deal! Sounds like that 6061 maybe wasn't hardened to spec. Or some O spec made it into the T6 supply chain. Bummer for sure, but end results sure are nice.

[@julian5883]

Yourself and Mr Millyard should collaborate on a Transatlantic project somehow! (Wish he would bring his gearbox MTB to market...I'd buy one...) regards as ever...

[@paulbrodie]

@@bradley3549 My best guess is that the heat treating was T4 or T5, not T6.

[@paulbrodie]

@@julian5883 Maybe Mr Millyard and I will have a conversation one day. We are about 8000 miles apart!

[@stephenabel897]

Lots of comments to the same thought. If you had a “Cub” pushrod tube. Why was it too long? What changed in your assembly of the motor?

[@paulbrodie]

Someone said the pushrod tube looked like it came from a BSA C15... I got a bunch of parts and four engine blocks that I used to make one good motor. I can't say why those tubes were too long. One of the Mysteries of the Universe, for sure.

[@stephenabel897]

@@paulbrodie and yet in the “tiger cub tear down” episode you are standing beside a motor that appears complete. Oh well, an interesting project anyway. Thanks for the entertainment. I look forward to Wednesdays and Saturdays.

[@paulbrodie]

@@stephenabel897 Yes, that was a motor with the "oval" head. I ended up using a "square" head, so maybe the difference is between the heads. Anyway, all is good now.

[@ramblerandy2397]

When I was a teenager and had my own Sports Cub [with an Alpha big end bearing that made all the difference to liking it] I thought that compact 200cc engine was so cute. That shot of it on the bench at the end did nothing but reinforce my opinion. Mine had an Amal Monobloc, but its advance/retard unit and points were side mounted like yours. Lovely videos of it. 👍 One little story - At the time I worked for an electrical motor factor and my advance/retard springs were kaput or just wrong. So, when I had time, I would open an a/r unit box and take the springs home to try. We had no units for the Cub, so it was guesswork and judgement. If they didn't work I returned them to the box unharmed. It took about 5 or 6 goes iirc and then I bought the springs. That little engine revved like a demon and the bike was much faster than the max 80mph indicated to the pin. It was tight, relatively quiet, didn't leak oil [no, honestly it didn't], idled properly and never misfired, nor oiled the plug. I guess I was lucky, although my brother was an excellent mechanic and he gave me good advice when I asked for it.

[@paulbrodie]

Good stories! Taking home springs to try and only buying the ones that worked.. I have a CDI unit, so my Cub will be lacking points.

[@shoominati23]

Have you got a big bore cylinder on that? I'll stick to my honda CB350 twin I think, it has enough vibration for me..

[@paulbrodie]

Well, the piston is .030" oversize. Is that big bore? CB350s are great bikes.

[@zmotorsports62]

Excellent workmanship as always Paul. I like Allen's channel as well. However I'm more of a Blue Sharpie guy. I prefer the ones with the fine on one end and ultra fine on the other. 👍 Mike

[@paulbrodie]

Thank you.

[@stephenwilliams926]

I turn that grade of aluminium a lot. Normally 1 1/4 diameter it always machines different and the finish is always different. I use p60 grit emery cloth then red scotch bright to finish off. Then it is hard anodized.

[@MreViewer]

Nice work Paul. But why doesn't the stock tube fit anymore?

[@paulbrodie]

Someone said the tubes could have been from a BSA C15. One of life's mysteries!