Thanks for the presentation. Back in the mid-'70s my buddy had both the 250 and 350 Sprint variants. We used to have a blast with those bikes. He was into extended wheelies and sometimes had trouble with oil starvation to the top end.
Extended wheelies! Sounds like you guys were having some fun back in the day. Yes, if the crankcase oil goes to the back of the case and is no longer surrounding the pickup that is a problem! Thanks for watching....
Man, there's a lot of ''why I didn't think about that'' kinda special tools in your videos. I just love how you make us think differently about tackling a problem. Keep it up Sir!
@@MechanicallyMindedMillennial he is clearly not on a production line, He's teaching how to, not how fast, so who cares how long it takes to build one engine? How long it takes to do these tools is clearly not his priority. He seems to have fun just making them and because he can, then he should do it. I've leaned how to think differently with this.
I would LOVE to see that Ducati single on the shelf behind you get rebuilt. Those are a shimming hell but it always makes me smile to see it behind you.
Great work. l had an aermacchi in the early 70's. Wish I still had it. I'm into British stuff now mainly Nortons. Just a suggestion. You can use the piston upside down in the bore to square up the rings to check the gap.
Paul and Mitch, another great video...thank you. Paul, Here’s a cheeky request for a couple of books: one, with your wonderful sketches/drawings, and another, a catalogue of your special tools, including a photo or sketch of how it’s used. I know you are a busy man, but one can dream!
Lots of small and tricky parts to those engines. Looking at all the special tools you need to make it is not something you can "just slap together". Great job on the engine and videos.
Dear Paul, thank you very much! Now I can assemble my Aermacchi. The bad thing is that when I see you do them they look easy but when I do them it's torture! I'm glad you're well! Keep up the good work!
thankyou for a great half hour`s viewing dynamic duo, 😊👍 the custom modified essential toolkit needs patenting! its great to watch people who know what they`re doing! i "love work,i could sit and watch it all day" 😉😇 another excellent instalment paul and mitch, thankyou both!
See you eliminated the tab washer under the clutch basket, I find the conicle nut solution you made very good as this way the nut grips the thread. IMHO tab washers are rarely a good idea because they are made of soft metal which often compresses in use and reduces the torque on the fastener.
That was a rather elegant solution for the clutch hub nut, I like it For the rocker arms, a trick I learned from working on Honda CB500/550 fours, rubber band around rocker arm to hold them up (On the Honda, the adjuster screw can (and does) drop to edge of valve stem and when you tighten rocker box down it bends valve(s) and if your really unlucky, crack valve guide top It's not something many people think about with an SOHC motor, but, you never do it a second time. One other thing I learned from Harley 'race' motors, have the 'split' in the valve collets (cotters?) in line with the rocker arm, if anything goes wrong when over revving (valve bounce when rocker arm may contact spring retainer) it's less likely that a collet can jump out. I've never actually seen it happen but anything that can go wrong on motor will go wrong at some time?
Nice! I like the special tools. At 12:02 unless you used a reverse thread allen screw the safety wire is attached to the wrong side of the allen screw.
Hello Paul, I really like the fix you worked out with using the bevelled nut, very neat. Like many others I suspect, I think your special tools are just the best. When you see them, it makes you think that’s a simple idea, but that’s what is great about them! Great video, and so good to see you looking well. Best wishes Kevin.
I was thinking "Special Tool" needed to be a drinking game for this episode! I tried to buy you guys coffee, but the payment service kept throwing errors. 😞
Every episode I learn new ways of assembling motorcycles. I love watching your thought process, problem solving and creativity to make your job achievable. The special tools are simple but highly effective. Thanks Paul. You know what I will be doing today in the shed . Making clutch and sprocket tools . Cheers mate from Australia 🇦🇺
Such beautiful castings on that engine! They actually kind of remind me of Campagnolo bicycle components: functional but beautifully designed and finished.
Excellent video! Did Aermacchi ever go with a chain driven overhead cam? It seems that would be almost an impossible job to put the push rods in without a special tool for a home mechanic. I wonder how the shop manual describes the installation. Did Aermacchi ever have factory race teams using this engine. You would think if they needed a 15 tooth front sprocket that would be required for a higher top speed for racing then the sprocket cover would have been designed that way...just a thought. Nice looking engine with a low center of gravity. Wonderful job for this video, thanks to both of you!
Thanks William. There were 2 OHC motors made back in the 60's, both different. Both used bevel drive, not chain drive for the cams. I use a 520 rear chain and a 15T sprocket. Many racers back then still used a 428 chain so the choice of sprockets was different.
Another great video Paul. Thank you for the time and effort you put into these. I learn a lot. I’m amazed at the custom tools you make and how your able to machine things so accurately. It’s really impressive 👍And I’m super happy seeing you doing what you love to do and looking healthy 🙏
Thanks Paul for taking all the extra time to respond to all of your followers. Most UA-camr’s don’t care or don’t make the effort. You deserve over a million subscribers by now……. Appreciate your hard work all the way around 👍
@@davidsnyder2000 Thanks David. It does take me a while to respond sometimes, but I do make the effort and I think that viewers do like that. A personal touch!
You're such a humble man. I love watching a master of his craft at work. You're also looking well there, Paul. I hope all is going in the right direction. God bless you, fella!
Got my Aermacchi because of the external banjo bolt, oil line setup was a leaker, the mouth breathers over torqued it by 100 ft lbs it was just a single oil line perhaps 1967 maybe, cool bike but the shifting pattern and controls were at first challenging not similar to most bikes, handled nice good low center of mass. Great production you guys always knock it outta the park.
@@paulbrodie Mouth Breathers Is kinda a wide descriptive term for those who are fairly large in number and collectively have an IQ of 5. And usually sport a 3/4 " drive tool set as their primary go-to and the most powerful Ingersall Rand impact driver made and a sledge hammer.
Hi Paul!!! Just to tell you that since you are missing i watched all the previous episodes back again. Definitely tiger cup cockpit is a masterpiece . Hope you find well and you recover soon. Thanks fede
Hi Fede. We hope to be making videos again very soon. Just need a little bit more strength, so we will start with the easy ones! Thanks for your support...
Thanks for the vid, I remember re corking clutch plates with my Dad, old British bikes, you bought the cork in sheets and cut the pieces out with a razor blade to fit in the plate. Used to take hours, anyone else remember doing this.
Yes, very lucky Blumin V 12 at the moment we are currently rebuilding the two engines on 1000 hp Sunbeam land, speed, car, first car of 200 mph we have two, 475 hp Sunbeam Aero engines in there, so we have 2V 12 to work on originally the engines run a powerboat race in America in a Harmsworth trophies. Were we have four Sunbeam engines unfortunately crack to Hull, and it never raced in fact, it’s sunk to the engines have got quite a bit of history that’s long before I got involved in them, so I do know where you’re coming from. Enjoy your program, Michael
that is pure and unadulterated art work, and you are my favorite artist. thank you for sharing your process. so happy to see you back in your shop also.
Hi Paul and Mitch . Excellent video and education , thanks muchly , I really enjoyed it . Loved the special tools ..... the head to cylinder/block bolts are rather difficult to reach , but would a crow's foot wrench be the tool for the job ? Since these fit onto a socket extender , you would be able to use a torque wrench too . That said you may still have to shave off some height on a crow's foot for this particular job ; depends on which tool you buy I suppose . I do like your push rod alignment tool ; what a pain of a job , without ET fingers ! Would a magnet help ? Lol
David, thanks for liking our video. I don't think that a crow's foot wrench would fit. There really is a lack of room. There is a possibility a magnet would help to hold the end of the pushrods.
I hate to be a nit picker but, having worked on helicopters for almost 50 years has made me so. Good idea to lock wire the filler plug but, the screw that you put in to wire it to is anti locked. Nothing would ever come of it but,,,. Great video. You are a master and i am paying attention.
Mate, I've run out of superlatives. No matter how good -- or bad -- they are, every mechanic, engine rebuilder, and backyard bodger should be made to watch your videos. Surely they'd be inspired.
I am rebuilding a 72 SX350 and am thoroughly glad seeing your detailed build videos. Glad you're back in the shop and hopefully on the mend. I am trying to get my crank rebuilt if you still have contact with Leslie w/ Moto Italia I would love to see if he has a connecting rod assembly. Thanks Paul, keep it up!
@@paulbrodie Understood, and thanks for the reply. I'm hoping whoever bought Leslie's parts stock opens for business soon. I finally got around to restoring thins old bike and now him and Lancaster's are gone so I gotta find parts somewhere. Keep up the awesome videos
Another fine video! Thanks Paul and Mitch for sharing. Your ability to make the special tools needed inspires me to do the same with everything I build and play with. Keep them coming and we will keep watching! Enjoy and be safe. And thanks for another "That's a good fit"!! I have my "That's a good fit" hoddie on today! Always make for a better day.
I have the factory special head wrenches for Ducati- but needed a different one for an AJP engine I overhauled. Easy to make, just weld an old socket onto the wrench, then you can use a torque wrench at 90º and have accurate measurements. I’m sure you can come pretty darn close by hand, but it is easy to do by spec too. I was going to add picture, but does not look like I can. I would not have thought of the adjustable pushrod- great idea to save a LOT of time.
I will definitely be building a tool like yours to adjust valves . Home made tools are very interesting and you dont disappoint. Thanks once agin for teaching me something.
Thankyou for your channel as an retired machinist I am loving watching your week in the shop. I have a 1o68 Honda CD 175 in about a thousand parts. You have Inspired me to start again and restore it
Thanks Roy. Is that a 1968 Honda you have? A thousand parts sounds about right. Yes, get that project together. It will feel good when you get it done...
Upps! Your safety wire from the oil fill plug to the head of the allen screw was on the wrong side if the allen screw head. If the filler plug loosened it would pull and loosen the allen screw also.
A very good video on engine building and getting things right. Valve spring seat pressure is something many people neglect but just as important is getting a spring that is matched to the cam. In the worst case the spring can coil bind resulting in a bent pushrod or damaged cam, especially if you gone for a higher lift cam.
G'day Paul, Thanks for another great video. I have 2 comments for you. Sorry, 3 comments. Longer springs are weaker than short springs, particularly if the longer spring has more coils. If they have the same number of coils, then they will have the same spring rate - the longer springs will have more travel before coil bind occurs, but they will also twist further. Valve springs do not provide a seat pressure - they provide a spring force. Pressure is a force over an area. If the spring is pushing against a piston, in a closed cylinder, then spring force on the piston creates a pressure in the cylinder. Note also that the specs called for 80 lbs, not 80 PSI. Finally, are you sure about the cam timing? Advancing cam timing increases low end power, & decreases top end power. Retarding cam timing increases top end power with a drop in low end power. It also moves the peak torque RPM closer to the peak power RPM, & works better with a close ratio gearbox. Anyhow, it's always good to see you in the workshop. I'm looking forward to the your nexy video. Andrew
Andrew, the clutch springs work just fine. I have used them for many years. I set the the valve seat pressure to 80 pounds. If I said 80 psi I was wrong. Cam timing. I "balance the peaks", and that is how I set my cam timing. I like to balance within 2 degrees, but this time I could only get it within 4 degrees. It is what it is. Thanks for commenting....
Paul Following on from your last engine build video when I asked about the clutch retaining nut and direction of thread I think you have answered my point if the spin of the clutch tightens the retaining nut then you do not meet a tab washer therefore giving you more thread engagement loctite is a good safety backup though if you look at captive rear wheel spindles on modern race bikes they do the same thing no spilt pin due to the wheel spinning and tightening up the spindle. Great video and good to see you so well. All the best Jon.
Awesome work Paul! Are you running standard valves? I recon the factory would have struggled to build such a nice looking engine on any of their racers :)
Love your videos! I’m restoring a 66 250 C and was wondering how far the piston edge sits down in the hole on stock engine? My replacement sits a few mm in
I actually think your humble pushrod lifter is your most brilliant "specialty tool", as I've never seen anything like it before, while all the others are a fairly standard variety as used on other applications. Now a "details" question: have you tried gasket shellac rather than skim coats of sealer? Is the sealer preferred as it fills surface irregularities, or is it just "how you do it"?
Paul ,,,, your a tease ,,,, in behind the camera etc you cant see him but I can .... We all want to see Mighty Mitch ,,,, lock the shot Mighty one and do a cameo .
I do use a torque wrench. I did mention that this was a "mockup" assembly, and that the final assembly would take place at a later date. Yes, there is a bit of gear play, but there is nothing I can do about that...
Chris, the Tiger Cub is basically done, except to fix the leaky oil tank.I even have it insured! We're just waiting for spring and the snow to melt and then we will take it out for a little ride :)
I never realized head gaskets were a thing that an engine could not-have, does it have some alternate way of filling the purpose, or does it just not need it somehow?
Vincent engines had no head gasket , the heads were ground to fit the cylinders . I never had a Vincent , but I don't think they were known for leaks ...... Laverda 750;s had a cylinder liner that protruded above and out of the cylinder . The cylinder head had a ring cut into its underside , around the combustion area , to accept the protruding cylinder liner . The Laverda 750 still used a head gasket though ! I never had a head gasket problem with mine ..... I must admit I like these Aermacchi engines . They have elements of old and advanced design , mostly advanced for their time for sure . Nice .
Do you rebuild Sprint motors? I have a 1972 engine with a 1973 barrel, head, pushrods, cylinder studs and 5 speed transmission. I would like to have it all assembled together. Thank you.
@@paulbrodie Bummer. I was looking forward to getting this 1972 1/2 Sprint back on the road. Thanks anyway. Any suggestions for someone on the west coast?
Thanks for the presentation. Back in the mid-'70s my buddy had both the 250 and 350 Sprint variants. We used to have a blast with those bikes. He was into extended wheelies and sometimes had trouble with oil starvation to the top end.
Extended wheelies! Sounds like you guys were having some fun back in the day. Yes, if the crankcase oil goes to the back of the case and is no longer surrounding the pickup that is a problem! Thanks for watching....
Man, there's a lot of ''why I didn't think about that'' kinda special tools in your videos.
I just love how you make us think differently about tackling a problem.
Keep it up Sir!
@@MechanicallyMindedMillennial he is clearly not on a production line, He's teaching how to, not how fast, so who cares how long it takes to build one engine?
How long it takes to do these tools is clearly not his priority.
He seems to have fun just making them and because he can, then he should do it.
I've leaned how to think differently with this.
Thank you very much!
@@brokenbonegarage8910 And thank you too....
I would LOVE to see that Ducati single on the shelf behind you get rebuilt. Those are a shimming hell but it always makes me smile to see it behind you.
That Ducati on the shelf is missing about 1000 parts... it is completely empty. So, something tells me that it is unlikely to happen....
30:02
Great work. l had an aermacchi in the early 70's. Wish I still had it. I'm into British stuff now mainly Nortons. Just a suggestion. You can use the piston upside down in the bore to square up the rings to check the gap.
Thank you Mitch...
Paul and Mitch, another great video...thank you. Paul, Here’s a cheeky request for a couple of books: one, with your wonderful sketches/drawings, and another, a catalogue of your special tools, including a photo or sketch of how it’s used. I know you are a busy man, but one can dream!
Thank you. I will keep those ideas in mind...
@@paulbrodie Cheers, Paul!
Thanks for the video. I always liked the look of the 73 and 74 engines. 👍
Thank you. My favourite head and barrel too!
Lots of small and tricky parts to those engines. Looking at all the special tools you need to make it is not something you can "just slap together". Great job on the engine and videos.
Thank you Tom...
Dear Paul, thank you very much! Now I can assemble my Aermacchi. The bad thing is that when I see you do them they look easy but when I do them it's torture! I'm glad you're well! Keep up the good work!
Thank you. I hope your Aermacchi motor goes together very smoothly!
Thanks Paul, Friday night saved!
Glad to help! :)
My favoritest Kanukistani bike builder, it's always a special pleasure to be back in your shop for another half hour or so.
Thank you very much!
thankyou for a great half hour`s viewing dynamic duo, 😊👍 the custom
modified essential toolkit needs patenting! its great to watch people who
know what they`re doing! i "love work,i could sit and watch it all day" 😉😇
another excellent instalment paul and mitch, thankyou both!
Thank you William. Good to hear from you!
Superb build Paul, your special tooling is art. Some fantastic ideas there. The 'adjustable pushrod' is inspired.
Best wishes, Dean.
Thank you Dean...
Great video! I'm bringing slowly a 1998 Ducati Monster back to life, not much in common but your dedication and ingeniosity are such an example.
Thank you Tryphon...
See you eliminated the tab washer under the clutch basket, I find the conicle nut solution you made very good as this way the nut grips the thread. IMHO tab washers are rarely a good idea because they are made of soft metal which often compresses in use and reduces the torque on the fastener.
Yes, the tab washer is history. Thanks for your approval...
The marker pen an engineers best alignment tool. Nice vid.
Thanks Stephen :)
Awesome to see the engine together! Thanks for letting us in on the project
Thanks Larry! 😉
That was a rather elegant solution for the clutch hub nut, I like it
For the rocker arms, a trick I learned from working on Honda CB500/550 fours, rubber band around rocker arm to hold them up (On the Honda, the adjuster screw can (and does) drop to edge of valve stem and when you tighten rocker box down it bends valve(s) and if your really unlucky, crack valve guide top
It's not something many people think about with an SOHC motor, but, you never do it a second time.
One other thing I learned from Harley 'race' motors, have the 'split' in the valve collets (cotters?) in line with the rocker arm, if anything goes wrong when over revving (valve bounce when rocker arm may contact spring retainer) it's less likely that a collet can jump out. I've never actually seen it happen but anything that can go wrong on motor will go wrong at some time?
I would think that the valve collets would revolve around the valve stem in use ..... I could be very deluded !
Thanks for liking my clutch hub nut... Yes, rubber bands could be used to hold rocker arms in place. Thanks for commenting.
Nice! I like the special tools. At 12:02 unless you used a reverse thread allen screw the safety wire is attached to the wrong side of the allen screw.
Don't worry, the Allen screw is not going to come loose.
Hello Paul, I really like the fix you worked out with using the bevelled nut, very neat.
Like many others I suspect, I think your special tools are just the best. When you see them, it makes you think that’s a simple idea, but that’s what is great about them!
Great video, and so good to see you looking well.
Best wishes Kevin.
Thank you Kevin. Appreciate your comments!
Sir you are a Genius, you always over come your obstacles. 👍
Thank you Joe.
An engine and a sculpture all in one❤️
Yes, thank you!
What do you use to get all these parts so clean??
Love the videos
Thanks Andy. I washed them in solvent. These are race motor parts, not high mileage road parts.
I was thinking "Special Tool" needed to be a drinking game for this episode! I tried to buy you guys coffee, but the payment service kept throwing errors. 😞
Happened to me too, seems like theres quite a bit of revenue not reaching Paul. I sent a few bucks via PayPay to his @
Thanks Fred. Yes, sometimes the "buymeacoffee" does have a glitch... Don't give up!
Every episode I learn new ways of assembling motorcycles. I love watching your thought process, problem solving and creativity to make your job achievable. The special tools are simple but highly effective. Thanks Paul. You know what I will be doing today in the shed . Making clutch and sprocket tools . Cheers mate from Australia 🇦🇺
Thank you Tristan. I'm glad I have inspired you even a little bit....
Such beautiful castings on that engine! They actually kind of remind me of Campagnolo bicycle components: functional but beautifully designed and finished.
Yes, I am very fond of Aermacchi castings. They are made very nicely!
Excellent video! Did Aermacchi ever go with a chain driven overhead cam? It seems that would be almost an impossible job to put the push rods in without a special tool for a home mechanic. I wonder how the shop manual describes the installation. Did Aermacchi ever have factory race teams using this engine. You would think if they needed a 15 tooth front sprocket that would be required for a higher top speed for racing then the sprocket cover would have been designed that way...just a thought. Nice looking engine with a low center of gravity. Wonderful job for this video, thanks to both of you!
Thanks William. There were 2 OHC motors made back in the 60's, both different. Both used bevel drive, not chain drive for the cams. I use a 520 rear chain and a 15T sprocket. Many racers back then still used a 428 chain so the choice of sprockets was different.
Very enjoyable video. Thanks.
Glad you enjoyed it. Thanks for watching..
You're smile says it all.
Another great video Paul. Thank you for the time and effort you put into these. I learn a lot. I’m amazed at the custom tools you make and how your able to machine things so accurately. It’s really impressive 👍And I’m super happy seeing you doing what you love to do and looking healthy 🙏
Thank you David. Appreciate your comments..
Thanks Paul for taking all the extra time to respond to all of your followers. Most UA-camr’s don’t care or don’t make the effort. You deserve over a million subscribers by now……. Appreciate your hard work all the way around 👍
@@davidsnyder2000 Thanks David. It does take me a while to respond sometimes, but I do make the effort and I think that viewers do like that. A personal touch!
3 minutes into the video and I hit like button. That multi-keyway gear is ingenious.
Thank you!
You're such a humble man. I love watching a master of his craft at work.
You're also looking well there, Paul. I hope all is going in the right direction. God bless you, fella!
Thank you Nicholas...
Got my Aermacchi because of the external banjo bolt, oil line setup was a leaker, the mouth breathers over torqued it by 100 ft lbs it was just a single oil line perhaps 1967 maybe, cool bike but the shifting pattern and controls were at first challenging not similar to most bikes, handled nice good low center of mass. Great production you guys always knock it outta the park.
Thanks for commenting, but please do tell me, who are the "mouth breathers?"
@@paulbrodie
Mouth Breathers
Is kinda a wide descriptive term for those who are fairly large in number and collectively have an IQ of 5.
And usually sport a 3/4 " drive tool set as their primary go-to and the most powerful Ingersall Rand impact driver made and a sledge hammer.
@@minle8702 In machine shop we called those kind of people "Rough Turners" to describe their quality of work...
I can't wait to see that baby blazing around a track! I said it before and I'll say it again, the whole machine is a work of art! Bravo!
Thanks Matthew. Yes, it will be time to fire that Aermacchi motor up shortly, and that will be a good thing.
I can't wait to see how much power this makes on a chassis..... Such a beautiful motor. Great work guys... Keep it up. 😁👍
Thank you...
Nicely done lads!
Much appreciated!
Very beautiful motor!
Thank you Bertrand!
Always great to see you on the workbench!
Thanks Fra....
Hi Paul!!! Just to tell you that since you are missing i watched all the previous episodes back again. Definitely tiger cup cockpit is a masterpiece . Hope you find well and you recover soon.
Thanks
fede
Hi Fede. We hope to be making videos again very soon. Just need a little bit more strength, so we will start with the easy ones! Thanks for your support...
@@paulbrodie if you need ideas, fillet brazing vs tig welding on bike frames 😀
@@federext Not short on ideas right now, but thanks...
Your Safety Wiring on the oil plug is spot on.
Actually it isn't. The wire should wrap the opposite direction to the screw thread. The Allen bolt could unscrew as wire is pulling it the 'wrong' way
Unfortunately it's anti-locked on the cap head bolt, it really could do with wrapping around in the 'tightening' direction.
Thanks for the vid, I remember re corking clutch plates with my Dad, old British bikes, you bought the cork in sheets and cut the pieces out with a razor blade to fit in the plate. Used to take hours, anyone else remember doing this.
No , but I have had used brake shoes relined .... useful when you cannot buy spares anymore...
Top shelf video Paul. Gets my mind working and love the ‘special tools “. Cheers!
Thank you Stefan...
Thanks Paul and Mich. Another great session !
Thanks Ray! 😉
Yes, very lucky Blumin V 12 at the moment we are currently rebuilding the two engines on 1000 hp Sunbeam land, speed, car, first car of 200 mph we have two, 475 hp Sunbeam Aero engines in there, so we have 2V 12 to work on originally the engines run a powerboat race in America in a Harmsworth trophies. Were we have four Sunbeam engines unfortunately crack to Hull, and it never raced in fact, it’s sunk to the engines have got quite a bit of history that’s long before I got involved in them, so I do know where you’re coming from. Enjoy your program, Michael
Paul you genius! Thanks for the new vid, is always good to see you!
Thank you Maxi!
that is pure and unadulterated art work, and you are my favorite artist. thank you for sharing your process. so happy to see you back in your shop also.
Thank you Lonnie. Very nice comments!
Great work, Paul. A lot of fantastic tips. It's nice to see you looking well.
Thanks Marty! 😉
Hi Paul and Mitch . Excellent video and education , thanks muchly , I really enjoyed it .
Loved the special tools ..... the head to cylinder/block bolts are rather difficult to reach , but would a crow's foot wrench be the tool for the job ? Since these fit onto a socket extender , you would be able to use a torque wrench too . That said you may still have to shave off some height on a crow's foot for this particular job ; depends on which tool you buy I suppose .
I do like your push rod alignment tool ; what a pain of a job , without ET fingers ! Would a magnet help ? Lol
David, thanks for liking our video. I don't think that a crow's foot wrench would fit. There really is a lack of room. There is a possibility a magnet would help to hold the end of the pushrods.
Thank you Paul and thank you Mitch. Greetings from Germany
Greetings to Germany!
I hate to be a nit picker but, having worked on helicopters for almost 50 years has made me so. Good idea to lock wire the filler plug but, the screw that you put in to wire it to is anti locked. Nothing would ever come of it but,,,. Great video. You are a master and i am paying attention.
LOL, I noticed that as well.
Mate, I've run out of superlatives. No matter how good -- or bad -- they are, every mechanic, engine rebuilder, and backyard bodger should be made to watch your videos. Surely they'd be inspired.
Phil, very nice comment. Thank you!
Nice motor!
Thanks Rod. I like it too!
I am rebuilding a 72 SX350 and am thoroughly glad seeing your detailed build videos. Glad you're back in the shop and hopefully on the mend.
I am trying to get my crank rebuilt if you still have contact with Leslie w/ Moto Italia I would love to see if he has a connecting rod assembly.
Thanks Paul, keep it up!
Thanks for liking our Aermacchi build videos. Leslie is retired and giving other shops names for parts, so he is out of the picture, shall we say?
@@paulbrodie Understood, and thanks for the reply. I'm hoping whoever bought Leslie's parts stock opens for business soon. I finally got around to restoring thins old bike and now him and Lancaster's are gone so I gotta find parts somewhere.
Keep up the awesome videos
Another fine video! Thanks Paul and Mitch for sharing. Your ability to make the special tools needed inspires me to do the same with everything I build and play with. Keep them coming and we will keep watching! Enjoy and be safe. And thanks for another "That's a good fit"!! I have my "That's a good fit" hoddie on today! Always make for a better day.
Thanks Robert. Glad that I can inspire you a little bit!
There's a new tee shirt, "I made a special tool"
I do like making special tools, in case you haven't noticed!
Hope to see you soon in another teaching video Paul. My thoughts and prayers are with you my friend 🙏👍
Thanks David. Yes, we do have another teaching video coming down the pipeline...
Great video Paul …what a beautiful engine
Thank you Derek!
I love all the special tools - something I do as well......Thanks as always.....
Thank you Matt :)
I hope you find well. I watch all your videos they are extremely enriching. I wish you the best and that you recover soon.
Greetings from Argentina
Hello Argentina! Thanks for liking our videos. I am slowly getting stronger, so we will be back making videos in a few weeks. Lots of new ideas :)
Paul, outstanding work as usual. Thanks again to you and Mitch.
Thank you Murray!
I was waiting for the angle measurement. Paul never disappoints.
Thanks Ed.
I have the factory special head wrenches for Ducati- but needed a different one for an AJP engine I overhauled. Easy to make, just weld an old socket onto the wrench, then you can use a torque wrench at 90º and have accurate measurements. I’m sure you can come pretty darn close by hand, but it is easy to do by spec too. I was going to add picture, but does not look like I can.
I would not have thought of the adjustable pushrod- great idea to save a LOT of time.
Mark, thanks for watching and commenting. We do appreciate it :)
beautiful motor i have always wondered about the inner workings of a Aermacchi..course with your enhancements makes them even better.
Thank you very much!
I will definitely be building a tool like yours to adjust valves . Home made tools are very interesting and you dont disappoint. Thanks once agin for teaching me something.
Thanks Doug. Happy to share some of my knowledge with you :)
Mantra for this episode: --- so I made a special tool.
I do like making special tools! :) Thanks for watching...
Thankyou for your channel as an retired machinist I am loving watching your week in the shop. I have a 1o68 Honda CD 175 in about a thousand parts. You have Inspired me to start again and restore it
Thanks Roy. Is that a 1968 Honda you have? A thousand parts sounds about right. Yes, get that project together. It will feel good when you get it done...
Dig it!!
Paul I know what you mean I once had to make a cylinder head bolt tool for a Fiat 128
Right on!
The better the valve train is set up the better the motor will run. 🏍🏍🏍
Upps! Your safety wire from the oil fill plug to the head of the allen screw was on the wrong side if the allen screw head. If the filler plug loosened it would pull and loosen the allen screw also.
Great to see you Paul , your looking well mate 😎😎🤘🤘🤘
Hey, thanks
The Bob Ross of engine building!!
Thank you. I take that as a compliment :)
Wahoooo! Another video finally!
More to come!
A very good video on engine building and getting things right. Valve spring seat pressure is something many people neglect but just as important is getting a spring that is matched to the cam. In the worst case the spring can coil bind resulting in a bent pushrod or damaged cam, especially if you gone for a higher lift cam.
Allan, good comments! The valve springs I use are actually Porsche, so the quality is pretty good!
always an masterclass! thankyou!
My pleasure!
Hi Paul hope all is well. Wory when your not teaching us.
I'm in recovery mode. We'll be back soon!
11 mm the Italians liked 11 mm . Struggle to find them in stores.. ps watching your old shows a second time.
Thanks Adrian.. You are right about 11mm. They are rare...
For once there is a man, whose amount of special tools is greater than that of Park Tool's. Keep it up =D
Thanks Oleg. I do own a few Park Tools, but I much prefer to make my own specialty tools.
Pure joy! ❤
Thank you!
@@paulbrodie Thanks for the response Paul! When this much time passes after the last video I find myself getting concerned about you...
@@stevesmith3033 Yes, I spent 10 days back in hospital from transplant complications. I think I am finally on the mend.
@@paulbrodie Sending you positive healing energy my friend. Stay strong.
@@stevesmith3033 Thank you Steve!...
G'day Paul,
Thanks for another great video. I have 2 comments for you. Sorry, 3 comments.
Longer springs are weaker than short springs, particularly if the longer spring has more coils. If they have the same number of coils, then they will have the same spring rate - the longer springs will have more travel before coil bind occurs, but they will also twist further.
Valve springs do not provide a seat pressure - they provide a spring force. Pressure is a force over an area. If the spring is pushing against a piston, in a closed cylinder, then spring force on the piston creates a pressure in the cylinder. Note also that the specs called for 80 lbs, not 80 PSI.
Finally, are you sure about the cam timing? Advancing cam timing increases low end power, & decreases top end power. Retarding cam timing increases top end power with a drop in low end power. It also moves the peak torque RPM closer to the peak power RPM, & works better with a close ratio gearbox.
Anyhow, it's always good to see you in the workshop. I'm looking forward to the your nexy video.
Andrew
quote .....Advancing cam timing increases low end power, & decreases low end power .....?????
@@davidyendoll5903 Bugger! Advancing cam timing increases low end power, & reduces top end power. I'll see if I can fix that. Ta. :)
Andrew, the clutch springs work just fine. I have used them for many years. I set the the valve seat pressure to 80 pounds. If I said 80 psi I was wrong. Cam timing. I "balance the peaks", and that is how I set my cam timing. I like to balance within 2 degrees, but this time I could only get it within 4 degrees. It is what it is. Thanks for commenting....
The safety wire is on the wrong side of the stud for the oil filter plug.
Don't worry, it will not come loose.
Drilling in a tiny tap in pin into a clutch nut notch may appease the Loctite Fearful.
An 11mm nut... when the vanishing 10mm mystery meets a design.
Paul
Following on from your last engine build video when I asked about the clutch retaining nut and direction of thread I think you have answered my point if the spin of the clutch tightens the retaining nut then you do not meet a tab washer therefore giving you more thread engagement loctite is a good safety backup though if you look at captive rear wheel spindles on modern race bikes they do the same thing no spilt pin due to the wheel spinning and tightening up the spindle.
Great video and good to see you so well.
All the best
Jon.
Jon, thanks for watching and commenting!
Awesome work Paul!
Are you running standard valves?
I recon the factory would have struggled to build such a nice looking engine on any of their racers :)
Love your videos! I’m restoring a 66 250 C and was wondering how far the piston edge sits down in the hole on stock engine? My replacement sits a few mm in
Thanks Tom. The edge of the piston usually sits pretty well even with the top of the cylinder. A few mm down does not sound right to me...
Thank you
You're welcome
I actually think your humble pushrod lifter is your most brilliant "specialty tool", as I've never seen anything like it before, while all the others are a fairly standard variety as used on other applications.
Now a "details" question: have you tried gasket shellac rather than skim coats of sealer? Is the sealer preferred as it fills surface irregularities, or is it just "how you do it"?
Thanks for liking our "special tools". The gasket sealer has worked well for me in the past, so I keep using it...
Paul ,,,, your a tease ,,,, in behind the camera etc you cant see him but I can ....
We all want to see Mighty Mitch ,,,, lock the shot Mighty one and do a cameo .
I think Mitch is still a little bit shy!!
Noticed you never use a torque setting tool on any of the fixings also the play on the gears seems excessive unless the specifications allow it.
I do use a torque wrench. I did mention that this was a "mockup" assembly, and that the final assembly would take place at a later date. Yes, there is a bit of gear play, but there is nothing I can do about that...
What! you made a special tool? :)
Yes, I really do like making Aermacchi special tools....
You can measure cylinder head nut torque by standing on a bathroom scale.
I guess I could, but I do have a pretty good sense for 30ft.lbs of torque.
my good fit is done with a FBH lol
Spelling error with "Link in the desricption". But I prefer it spelled that way anyway.
I hope your doing okay Paul🙂
Thanks David, I am ok. Getting my strength back. New video this week!
Hi Paul, did you get the Tiger Cub finished? Would love to see it on the road!
Chris, the Tiger Cub is basically done, except to fix the leaky oil tank.I even have it insured! We're just waiting for spring and the snow to melt and then we will take it out for a little ride :)
@@paulbrodie that’s great Paul, can’t wait to see it. 👍
Hi Paul, how are you? Hope all is well.
Hi. I feel ok today. We might even make another video soon!
@@paulbrodiethats great.. would be looking forward for it.
No lube on the cam lobes or gears? Love your stuff, Paul. Thanks for supporting Ukraine with your little flag in the background!
David, this was a mockup build, so the cam and followers will get a coat of good lube for the final assembly. Thanks for noticing...
I never realized head gaskets were a thing that an engine could not-have, does it have some alternate way of filling the purpose, or does it just not need it somehow?
Vincent engines had no head gasket , the heads were ground to fit the cylinders . I never had a Vincent , but I don't think they were known for leaks ......
Laverda 750;s had a cylinder liner that protruded above and out of the cylinder . The cylinder head had a ring cut into its underside , around the combustion area , to accept the protruding cylinder liner . The Laverda 750 still used a head gasket though ! I never had a head gasket problem with mine .....
I must admit I like these Aermacchi engines . They have elements of old and advanced design , mostly advanced for their time for sure . Nice .
Aermacchis simply do not have head gaskets. They do not need them, and I have not had a leakage problem.
I cut something on my lathe last night and while I test fit it I mumbled “that’s a nice fit”. I blame you.
I accept the blame. Thanks for watching!
Do you rebuild Sprint motors? I have a 1972 engine with a 1973 barrel, head, pushrods, cylinder studs and 5 speed transmission. I would like to have it all assembled together. Thank you.
I do not rebuild other peoples Sprint motors, sorry. I am retired.
@@paulbrodie Bummer. I was looking forward to getting this 1972 1/2 Sprint back on the road. Thanks anyway. Any suggestions for someone on the west coast?
@@bryanwhitton1784 Send me an email and we can discuss... No promises.