In 1970 A.M.A. races you could run a 350 four stroke in the 250 class. I went to the race at Seattle that year. There was only one 4 stroke in the 250 class. Cal Rayborn was on 350 HD/Aermacchi .After the first 5 laps he was ahead of 2nd place by the length of the front straight. From there on he cruised to the finish while the rest of the field fought for 2nd place. He was an amazing talent.
Hi Paul I had 1965 HD 250 sprint. In the mid 70’s I rode it from Vancouver to Salmon Arm, via the Fraser Canyon, and back to attend a friend’s wedding. On the way back I had really strong headwinds from Hope to Vancouver. So strong that it couldn’t maintain 4th gear and I had to keep downshifting to 3rd to haul my 200 lb. mass of aero drag down the freeway. The next day there were ominous sounds emanating from the bottom end from which it never recovered.
Yes, I have experienced those strong headwinds you talked about. They actually blew one of our bikes off its' side stand and it fell over. We also had to downshift and our bikes were 750's. Sorry to hear your little Aermacchi suffered...
Dear Paul, welcome back. Congratulations for your resilience and stamina. May you always work with passion and have a lot of fun in your shop. Thank you for sharing your very interesting videos and techniques. All the best to you and Mitch, and cheers from Italy,
My 1972 Suzuki T500 Titan TLS front hub is drilled the same way. I always liked the look too. But the TLS brake side is otherwise different. I’m enjoying seeing you back in your shop.
That's what it looks like to me also however another poster recognized it as Yamaha TD1C, probably from the construction of the back plate with scoop. I'd say the hub proper is the Suzuki T500 unit, drilled for cooling.
If you move the speedometer pickup to the other side of the wheel, it will reverse the direction of the cable - if it still mounts below the axle shaft. Speedometers wont work with a cable spinning the wrong direction. If you mount it above the axle shaft on the other side it will spin in the right direction. It is also possible to swap the fork tubes side to side and have the speedometer output feeding on the front on the bottom side (which will make it spin in the right direction) if it is feasible to do so. If mounting it above the axle shaft or swapping the fork tubes is not possible, you can also find a speedometer head (gauge) that uses a backwards spinning cable, or you can use a reversing speedometer ratio adapter to switch directions. The ratio adapters used to be really cheap, but they have gone way up in price since speedometers went electronic instead of cable. If you search around you can find one that isn't as expensive, but it may take a while.
There's no simple way to get the existing speedo drive unit to spin in the same sense when driven from the opposite side of the wheel. When you say "mount it above the axle" or "swapping the fork tubes" that means new gears or a new housing to change the relationship of the gears: [My hat is ready, at hand, in case I have to eat it.]
That is a gorgeous Sprint you have created. I always liked the hump back tank. I had four Sprints, but none of them had that beautiful tank. Thanks for the video. 👍
Nice to see you in the shop again - I once followed Robert Dunlop around Isle of Man on a friend's Aermacchi and it was a very sweet bike. A properly sorted one is a joy.
Paul. It looks great! I have a 61 that is 95% stock now. I just fixed the original gas tank and when I get it painted and back on, it will be 100% beside tank repainted. Mine was red also but appears to be orange know do to fade.
I love Italian bikes . I had a SF2 Laverda for years , but I rode quite a few friends machines . Never even seen an Aermacchi , apart from at bike collections , but they were capable in their time and would put a grin your face today I am sure . Nice work on the wheel and great to see you again !
Definitely a hub and brake plate from an early air cooled Yamaha twin cylinder race bike. Look up TD1A/TD1B/TD1C images on google and you'll see plenty of images of early Yams with that front hub/brake set up fitted.
Hi Paul and Mitch. Great film. Interesting mod to the rear frame/engine mounts. I prefer the looks of the racing bike frames. Have you considered converting a road frame to a race frame layout even though it would probably be simpler just to build a race frame. Best of luck for the future.
Thank you. Yes, I like the road race frames much more too. I have built two such bikes. The first got stolen in 2005 and was never recovered. I still have the second racer, and it has been featured in many videos... :)
I think that you may have an Oldani brake hub, they were available for race bike builders in a custom build. It could also be off a TD2 / 3 Yamaha but I do not remember the scoop as big as that.😊
G'day Paul, I was worried that you were spinning the brake around the wrong way, making it a twin trailing shoe brake. It took me a while to check, but I was wrong, so it's OK. Dad restored a black 250 Aermacchi for mum in the 70's. Mum & dad used to take my brother & I out on their bikes. I remember being on the back with mum on her Puch 250, and her Suzuki GT380, but I don't think she rode the Aermacchi. Dad would have riden at least once though. So, it's nice to see your 350. It's not right that your bike was held up for 20 years because of a wiring problem, but I liked the idea of it being in the kitchen. LOL I'm looking forward to the next episode. Andrew
Correct. This hub, brake plate shoes and levers were used on all the production Yamaha road racers from the 1962 TD1 all the way to the last TD1C in 1968. The shoes were improved for the TD1C but earlier ones will fit this hub.
The Aermacchi company had some quite advanced engineering back when. The horizontal cylinder allowed for a very low overall profile and a short stiff chassis. Quite an harmonious design.
Paul, Good idea to stiffen the swing arm pivot too! You captured the perfect look with the Euro tank and seat treatment, and the Suzuki rear fender looks like it was born there too. On the mechanical side, I once noticed that the Aermacchi combustion chamber looks exactly like my old Ducati 900 Monster’s, a tri-spherical design. It must work well! Thank you for all the content.
Good to see you back! I bought a chinese metal lathe because of your channel amongst others and I need your wonderful teaching on machining. Now where can I get a Milling machine of small to mid size, retirement approaches and it will be great to do things I always had an interest in at long last. Stay well Paul and Mich
Glad to see you back. I haven't been on Facebook much last few months so pretty out of touch You will need a different speedo drive as it will turn in the wrong direction when you 'flip' position. A stock Yamaha one will fit hub but I doubt the cable will screw onto it. Should be very easy to source parts, XS 650 will probably be easiest to find for the drive flange and gearbox.
@@paulbrodie As a cyclist and a motorcyclist I can fully appreciate your ablity and skill set. My former bike builder/mechanic was of the old school, he started with building steel tube hand brazed frames to aluminum (bonded&welded) into the current carbon fiber frames. So yeah, I do admire and appreciate your efforts. Keep on keeping on.....
At 8:20 The space near the axle should be preserved because there is more stress there than on the external diameter. I can see later in the video that you didn't drill a too big hole, it's OK. Still your videos are very nice.
Whadda beautiful cute red bike :-) Ya done very well! Duplex drum brakes with air scoops were mounted for example on Laverda and Benelli. They were common on the really fast bikes in the days bevore the disk brakes. The italian company Grimeca built them. But I cant say for shure, that your brake is a Grimeca. By the way, duplex brakes with air scoopes looks fast even when standing still ;-)
@@paulbrodie And so I learned another English expression. What I particularly like are cable-operated disc brakes. The brake calipers are not hydraulically operated, like on any normal motorcycle, but rather by cable. These were mounted on the MV Agusta 600. But I have no idea which company made these calipers or where you could get them. Unfortunately.
The rim is "Italcerchio" which basically means "Italian Rim"... The "wrong lacing" comes from the fact that the rim has Italian lacing, while the hub has English lacing. I had the same problem on one of my bike... 😭
Thank you for Italchio... But I don't believe there is such a thing as Italian lacing, and English lacing. The spoke either leaves the rim at the Correct Angle, or the Wrong Angle.
@@paulbrodie Actually there are 2 types of hole patterns, you can check on the website of rimsandrims. Under FAQ section there is an example of the 2. 👍
I have to ask this Paul, why are you interested Aermacchi motorcycles? I've always thought of Aermacchi as a obscure brand in the Canadian, large unknown, except for Rebadged Harly Davidson of the late 60/70s.
@@johnb5519 He never replied. I don't think he ever sells any of the vehicles he works on. He must have a huge warehouse. Edit: I would have entertained a counter if he wanted to sell it.
The hub looks like a Suzuki T-500, but the brake plate does not. PM me if you’d like me to send you a picture of a complete stock T-500 front hub assembly.
that hub/brake certainly looked familiar. So I asked Larry Koop if the same as one of his vintage racers. Here is his response: Yup front drum and plate from a Yamaha TD1-A/B
Hi Paul, the front brake hub is from a Yamaha TD1C 250cc race bike of around 1967. The later TD2 and TR2 brakes were all double sided 4LS hubs.
I believe you are correct!
I was going to say that. 😁
In 1970 A.M.A. races you could run a 350 four stroke in the 250 class. I went to the race at Seattle that year. There was only one 4 stroke in the 250 class. Cal Rayborn was on 350 HD/Aermacchi .After the first 5 laps he was ahead of 2nd place by the length of the front straight. From there on he cruised to the finish while the rest of the field fought for 2nd place. He was an amazing talent.
Yes, I have heard that story. Many years later his son Cal Rayborn 3 also raced at Seattle, that time on a HD V-Twin.
Amazing ❤
Thanks Paul and Mich.Great to have you back
Thanks Ray. Yes, we do appear to be back... :)
Nice to see the Old Timer back in the shop!
Oh yeah! Thanks for watching!
Hi Paul
I had 1965 HD 250 sprint. In the mid 70’s I rode it from Vancouver to Salmon Arm, via the Fraser Canyon, and back to attend a friend’s wedding. On the way back I had really strong headwinds from Hope to Vancouver. So strong that it couldn’t maintain 4th gear and I had to keep downshifting to 3rd to haul my 200 lb. mass of aero drag down the freeway. The next day there were ominous sounds emanating from the bottom end from which it never recovered.
Yes, I have experienced those strong headwinds you talked about. They actually blew one of our bikes off its' side stand and it fell over. We also had to downshift and our bikes were 750's. Sorry to hear your little Aermacchi suffered...
looking good, paul! you and the bike! ;o)
Thanks 👍
Nice to see you back.
Dear Paul, welcome back. Congratulations for your resilience and stamina. May you always work with passion and have a lot of fun in your shop. Thank you for sharing your very interesting videos and techniques. All the best to you and Mitch, and cheers from Italy,
So glad you are back fabricating and sharing your knowledge and expertise! Go Paul and Mitch, keep moving forward!
Yamaha TD1C Hub - I had one on my racer 72-73. Def. Ferodo needed, otherwise fades something rotten!
Thank you. Brake shoes are in the process of getting Ferodo linings bonded on.
The counterweight for the boring bar is genius. Another great video you guys!
Thanks Shawn. Glad we can share secrets with you :)
I always learn something new from these vids. Counterweighting the boring head and using a t-handle wrench on the Bridgeport head this time.
Thanks Tom. That's good I can still teach you a few tricks.
Great to see you back Paul and Mitch 👏👏👏👌
They did that drilled finning thing on the Suzuki T500 hub which I have on my Aermacchi.
Love your vintage racing efforts. You get all the details.
Great to see you and Mitch posting , great result with the hub too.
Brilliant! I love those hump tank Sprints! And your's is probably the coolest one ever........
Thank you so much!
Mr. Brodie I sure do appreciate your uncompromising attention to detail. Thanks so much for sharing
Thanks Rick. Yes I am a #fussyframebuilder :)
Nice work Paul, as always.
My 1972 Suzuki T500 Titan TLS front hub is drilled the same way. I always liked the look too. But the TLS brake side is otherwise different. I’m enjoying seeing you back in your shop.
That's what it looks like to me also however another poster recognized it as Yamaha TD1C, probably from the construction of the back plate with scoop. I'd say the hub proper is the Suzuki T500 unit, drilled for cooling.
That’s a great looking motorcycle good to see you Paul and Mitch
Welcome back Paul and Mitch..... Good to have you back. 😁👍❤️
If you move the speedometer pickup to the other side of the wheel, it will reverse the direction of the cable - if it still mounts below the axle shaft. Speedometers wont work with a cable spinning the wrong direction. If you mount it above the axle shaft on the other side it will spin in the right direction. It is also possible to swap the fork tubes side to side and have the speedometer output feeding on the front on the bottom side (which will make it spin in the right direction) if it is feasible to do so. If mounting it above the axle shaft or swapping the fork tubes is not possible, you can also find a speedometer head (gauge) that uses a backwards spinning cable, or you can use a reversing speedometer ratio adapter to switch directions. The ratio adapters used to be really cheap, but they have gone way up in price since speedometers went electronic instead of cable. If you search around you can find one that isn't as expensive, but it may take a while.
There's no simple way to get the existing speedo drive unit to spin in the same sense when driven from the opposite side of the wheel. When you say "mount it above the axle" or "swapping the fork tubes" that means new gears or a new housing to change the relationship of the gears: [My hat is ready, at hand, in case I have to eat it.]
That is a gorgeous Sprint you have created. I always liked the hump back tank. I had four Sprints, but none of them had that beautiful tank. Thanks for the video. 👍
Thanks so much!
Glad to have you back in the shop machining things!!!
As always, quality content and workmanship .
Thats really great all you can do with machine tools. Great looking hub! Thanks for the video!
Nice to see you in the shop again - I once followed Robert Dunlop around Isle of Man on a friend's Aermacchi and it was a very sweet bike. A properly sorted one is a joy.
You make it all look so easy Paul. Don’t do too much.
Paul. It looks great! I have a 61 that is 95% stock now. I just fixed the original gas tank and when I get it painted and back on, it will be 100% beside tank repainted. Mine was red also but appears to be orange know do to fade.
Good to see you back in the workshop. That hub has several features which look familiar but not all in one piece!
I love Italian bikes . I had a SF2 Laverda for years , but I rode quite a few friends machines . Never even seen an Aermacchi , apart from at bike collections , but they were capable in their time and would put a grin your face today I am sure . Nice work on the wheel and great to see you again !
Thanks David. I am very happy to own several Aermacchis :)
I hope you have as much fun making the videos as I have watching them!
Thanks Gregg. Yes we enjoy ourselves making these videos.
At 5:45 ItalCercchio ( Italia Cercchio = Italy Rim ) Italy in Brivio still exists
The tyre is a racing one.
You are correct. I did find the rim website...
Good you are in your shop doing Paul and Mitch things!!
Definitely a hub and brake plate from an early air cooled Yamaha twin cylinder race bike.
Look up TD1A/TD1B/TD1C images on google and you'll see plenty of images of early Yams with that front hub/brake set up fitted.
Lovely to see you back, love your work.
Hi Paul and Mitch. Great film. Interesting mod to the rear frame/engine mounts. I prefer the looks of the racing bike frames. Have you considered converting a road frame to a race frame layout even though it would probably be simpler just to build a race frame. Best of luck for the future.
Thank you. Yes, I like the road race frames much more too. I have built two such bikes. The first got stolen in 2005 and was never recovered. I still have the second racer, and it has been featured in many videos... :)
@@paulbrodie Thanks Paul. I followed the Aermacchi racebike build with great interest as I have friends who own and race 250 and 350 Aermacchis.
I think that you may have an Oldani brake hub, they were available for race bike builders in a custom build. It could also be off a TD2 / 3 Yamaha but I do not remember the scoop as big as that.😊
Great stuff Paul and Mitch. Beautiful bike too. I've never counterbalanced the boring head, I will now!
Best wishes, Dean.
Good to see you back in the shop.
Thank you.
Beautiful bike and work. Been riding narrow-case Duc singles (for daily transportation) for years but have always wanted an Aermacchi......
Back on track…feeling and engineering-wise😎Thanks for the new video🌟👍🏻
I haven’t ridden one of those since you and I were both in high school!
Nice work. I spent a number of years a long time ago working in a machine shop and this is largely a lost art today!
You are right about machine shop becoming a Lost Art. I encourage viewers to use their hands and actually make or fix things...
It's great to see you back on the tools Paul! Well done Sir!
Those TIG welds are really nice.
Thank you. I did practice......
G'day Paul,
I was worried that you were spinning the brake around the wrong way, making it a twin trailing shoe brake. It took me a while to check, but I was wrong, so it's OK.
Dad restored a black 250 Aermacchi for mum in the 70's. Mum & dad used to take my brother & I out on their bikes. I remember being on the back with mum on her Puch 250, and her Suzuki GT380, but I don't think she rode the Aermacchi. Dad would have riden at least once though. So, it's nice to see your 350. It's not right that your bike was held up for 20 years because of a wiring problem, but I liked the idea of it being in the kitchen. LOL
I'm looking forward to the next episode.
Andrew
Love your bike buddy!!! Praying for you!!👍🚲
Thanks Mike.
Hi Paul… Good to see you in your shop. That front brake looks to be from a Yamaha TD-1 A or B race bike. Cheers. 👍🏁
Correct. This hub, brake plate shoes and levers were used on all the production Yamaha road racers from the 1962 TD1 all the way to the last TD1C in 1968. The shoes were improved for the TD1C but earlier ones will fit this hub.
Thanks. You might be right...
Thank you. But wouldn't there be a tuning fork logo somewhere?
Great job Paul 😎🤘
Hooray...the boys are back!!
The Aermacchi company had some quite advanced engineering back when. The horizontal cylinder allowed for a very low overall profile and a short stiff chassis. Quite an harmonious design.
Yes, and they can be made to handle very nicely :)
Paul, Good idea to stiffen the swing arm pivot too!
You captured the perfect look with the Euro tank and seat treatment, and the Suzuki rear fender looks like it was born there too.
On the mechanical side, I once noticed that the Aermacchi combustion chamber looks exactly like my old Ducati 900 Monster’s, a tri-spherical design. It must work well!
Thank you for all the content.
Excellent, a shop I used to work in had a Linto 500, a relative of this I think.
Yes, the Linto was two 250's side by side. Not a very successful motorcycle.
@@paulbrodie looked good though 👌
Welcome back. Cool bike.
I had a Yamaha YDS7 with a twin leading front brake. The drum worked ok, but i was always worrying about the brake cable snapping 😮
Love you Paul Brodie!!
Love you too :)
Good to see you back! I bought a chinese metal lathe because of your channel amongst others and I need your wonderful teaching on machining. Now where can I get a Milling machine of small to mid size, retirement approaches and it will be great to do things I always had an interest in at long last. Stay well Paul and Mich
Thanks Darrock. I really hope you do get that milling machine! :)
Rite Paul Dude, Good to see you again! Can't say the same for Mitch as we never see him 🤔! TFS, GB :)
Hi Mitch...
Good to see you back!
Thank you.
Glad to see you back.
I haven't been on Facebook much last few months so pretty out of touch
You will need a different speedo drive as it will turn in the wrong direction when you 'flip' position.
A stock Yamaha one will fit hub but I doubt the cable will screw onto it.
Should be very easy to source parts, XS 650 will probably be easiest to find for the drive flange and gearbox.
Beautiful machine
I like your counterweight idea... I never thought of that.
Seems like the counterweight is a hit! Thanks for watching!
As always, another great video.....
Glad you enjoyed it
@@paulbrodie
As a cyclist and a motorcyclist I can fully appreciate your ablity and skill set. My former bike builder/mechanic was of the old school, he started with building steel tube hand brazed frames to aluminum (bonded&welded) into the current carbon fiber frames. So yeah, I do admire and appreciate your efforts. Keep on keeping on.....
Thanks Paul, always a pleasure.
Thank you Hertog..
Sitting on one while it idled it felt like the piston was setting still while the motorcycle went back and forth.
good to see you back
Hello, hope all is well. Ever since you build that one engine arimachi. I've been wanting one.
I am good. I hope you do find yourself an Aermacchi.
At 8:20 The space near the axle should be preserved because there is more stress there than on the external diameter.
I can see later in the video that you didn't drill a too big hole, it's OK.
Still your videos are very nice.
Thanks. Yes, I was careful not to remove too much material :)
Good to see ya
I made bronze frames for stainless mesh in the hub windows.
I have the frame. I just need a piece of mesh...
@@paulbrodie love to see your design. The stainless mesh is easy just get 40% open area or if you want more open area try 60%
Terrific thank you 😊
Nice bike!
Whadda beautiful cute red bike :-)
Ya done very well!
Duplex drum brakes with air scoops were mounted for example on Laverda and Benelli. They were common on the really fast bikes in the days bevore the disk brakes. The italian company Grimeca built them.
But I cant say for shure, that your brake is a Grimeca.
By the way, duplex brakes with air scoopes looks fast even when standing still ;-)
Thank you. I refer to them as Twin Leading Shoe brakes....
@@paulbrodie And so I learned another English expression.
What I particularly like are cable-operated disc brakes. The brake calipers are not hydraulically operated, like on any normal motorcycle, but rather by cable. These were mounted on the MV Agusta 600. But I have no idea which company made these calipers or where you could get them. Unfortunately.
Only early Laverda 650/750 twins used Grimeca, Laverda made their own drum brakes in two versions
@@crozwayne thanx for the info!!
@@LeDibeau no problem my friend
How might I buy you guys a cup of coffee?
Click on the Buymeacoffee icon when it pops up. Thanks.
Hi Paul
Think the hub looks like a Suzuki GT 500
Cheers Al
The rim is "Italcerchio" which basically means "Italian Rim"...
The "wrong lacing" comes from the fact that the rim has Italian lacing, while the hub has English lacing.
I had the same problem on one of my bike... 😭
Thank you for Italchio... But I don't believe there is such a thing as Italian lacing, and English lacing. The spoke either leaves the rim at the Correct Angle, or the Wrong Angle.
@@paulbrodie Actually there are 2 types of hole patterns, you can check on the website of rimsandrims. Under FAQ section there is an example of the 2. 👍
Are you sure the tank isn't on backwards? 😅
I am 100% sure the tank is mounted correctly :)
Oooooo, i covet that knee mill!
the speedo cable must be on the right side so that the cable turns the right way
We will find out.
I have to ask this Paul, why are you interested Aermacchi motorcycles? I've always thought of Aermacchi as a obscure brand in the Canadian, large unknown, except for Rebadged Harly Davidson of the late 60/70s.
The brake drum looks like a fontana drum to me but I'm probably wrong
Would that be the exact same as the Harley badged bikes? I watched a video of this young guy who picked one up recently, and got it going.
Ah 2Vintage! I watched him get his 250 started and then get his 350 started. I made an offer to buy the 350.
@@bryanwhitton1784 So, did he accept, or does he want to keep it?
@@johnb5519 He never replied. I don't think he ever sells any of the vehicles he works on. He must have a huge warehouse. Edit: I would have entertained a counter if he wanted to sell it.
@@bryanwhitton1784 They are cool bikes, and I don't blame you for trying, I wouldn't mind having one either.
Yes, Aermacchis were sold in N. America as Harley Sprints...
COUNTER WEIGHT: BRILLIANT.
🤘🤘👍
Thanks!
👍👍👍👍
😎👍
The hub looks like a Suzuki T-500, but the brake plate does not. PM me if you’d like me to send you a picture of a complete stock T-500 front hub assembly.
I bet that was a very satisfying boring job on the hub.
For you to be out of the workshop for a whole month says you have been ill. Are you syruggling with the cancer? Best wishes.
that hub/brake certainly looked familiar. So I asked Larry Koop if the same as one of his vintage racers. Here is his response:
Yup front drum and plate from a Yamaha TD1-A/B
Thank you..