cool project. Reminds me so much of good vibes of when I rebuilt my 350/400 macchi TV , from a basket of parts to a replica ala d'oro racer high spec. Keep it go :)
Thanks for showing many Aermacchi videos, I’ve got two Aermacchis in Italy (not race bikes though) and it is just fantastic to have the opportunity to learn so much from your videos! I wish I was living nearby I would be at your door step everyday begging to learn more and more from you! Thanks a lot and wish you the Best!
Hi Paul, It's probably 45 years since I was working on AMAL carbs so I had to sleep on it after watching vid.. It may be worth checking the actual shut off needle, it's rare but I have seen a couple that were longer than they should be (usually non-genuine parts but could be from a diferent AMAL?) One other thing to check, because of the float pivot position, having carb tilted forward lowers the fuel level in float bowl. If carb was designed specifically to be mounted vertical (on a Bonneville) this will lower fuel level in bowl compared to a Commando with 'race' manifolds. (10 degree angle) It may be something else entirely but it's relatively simple to check fuel level which will be close to gasket surface. I forget details as that style AMAL was pretty new when I was working on them (Mk I Concentric's were the 'common' carb) Monoblock's were so much easier, fuel level with the 'pip' in middle of cover at whatever angle you were running, file contact point of shut off valve to adjust level (one piece plastic float, non adjustable).
It's a megaphone, every 4 stroke single is going to snarl with a megaphone, the real test is with the stock muffler mounted, does the bike have the valve timing to sound snarly, throttle off when decelerating through the gears.
@@paulbrodie I remember my ERS back 50 years ago. 32 mm Mikuni with jetting specs from Mert Lawwill. It ran Sooo much better with the Mikuni than it did with the Del Orto. I ran an open megaphone even though silencers were "required".
Awesome! The Italians build great sounding bikes often times they forgot the horsepower though! This from a Ducati guy. Regrettably I had a ‘74 GT 750 project that I intended for the track. I didn’t strike when the iron was hot and the project made no sense as my track days wound down. Sold it all and finished up a Ducati 851 restoration. I guess you can’t do it all or take it with you! Beautiful bike and great problem solving!
Getting closer! The only carb out of the box that ran "good" on a bike was an S&S. It took weeks of daily trial and error to put a rotax pulse jet type water craft carb on a Victory before it ran good enough to try a good, long test ride. (The S&S was just to big to fit the avaliable space ubder the tank. You will get there. Keep at it! And again, good to have you back on my feed.
great Race history Paul. Iam Glad to see you are Much Better Mate. The Bike Sounds Orsome. My Uncle Road Raced here in Australia and Always wanted Aermacchi. It was his Dream, that iam afraid never Got For filled Uncle Ian Is in His 80 s Now. i Now understand why he wanted one, after seeing your Great Build Here. Dave from Australia
Thanks for the insight of working on and tuning these beautiful machines. l remember seeing the road going versions as well as the race bikes in 1963/65 at Brands Hatch race track in Kent UK,..These bikes were expensive to buy, as were all Italian bikes even then..Compared to what was on offer in UK at the time these Bike really were exotica.
Hello Paul, you’ve clearly worked very hard on the bike and it sounds so much better. Well done! I knew you would not settle for the way the last video ended. Best wishes Kevin.
I've got a '67 Ducati 250 scrambler I've owned since I was a teen. Comparisons between the Aermacchi and Duc are pretty stark. I've always thought the Aermacchis were a bit industrial compared to the OHC Ducatis, More low end but they really seem to just lose the ability to rev out like Ducatis. 5 speed versus 4 speeds with slightly tighter gear ratios to keep Ducati's engine on the boil. I've trail and gravel road ridden mine a fair amount before I got interested in bicycles.
If Duncan is who I think he is... he was one of my most favorite people to share the track with, always rode hard and clean - his 850 Commando was a good match for my 250 Ninja :)
Thanks John. The starter belongs to a friend. It is just on loan. In use, the rear wheel wants to kick to the right, a lot, and then the bike has to be re-positioned. I want a starter where the rollers have a "dip" in the middle that would assist in holding the tire also in the middle. I think a new starter is about 1000 dollars.
I'm looking forward to when you get the timing sorted out. Only then can you really dial in that carb. What size is that Amal? And did you keep notes of the jetting used on the previous racer, with whatever carb that was used on it? One thing I learned about carb sizing is if the size is correct then uncorking the exhaust lets the carb flow more air so the venturi effect is stronger and flows more fuel with no need for changing jets. If the carb is too large it runs lean, signal is weaker, so you need to jet larger. If the carb is too small, the signal is much stronger, so it runs richer, and you need to lean the jetting. So once you get your timing you could "cork" your exhaust and compare your jetting to your "uncorked" exhaust. I discovered this first years ago with a Sportster that A guy put drag pipes on. The usual idea was to richen the jetting. That sure didn't work. I ended up having to solder up jets and drilling them undersized to get a correct mixture. Later on I found out the later Sportsters had a 36mm carb on them when the earlier had 38mm carb. I also found this true on other engines, British and American. The 93" engines I've built always end up needing to be leaned way off the charts, meaning they would work fine with a larger carb.
Tha Amal is a 34mm bored out to 35mm. I did use the same jetting, but I changed the megaphone. I am going back to the previous megaphone to see what happens. Thanks for commenting :)
@@paulbrodie Yeah that can be telling. What is the intake valve diameter? I couldn't find anything on the internet or Ebay about valve diameters. I'm guessing you have a 11:1 a piston in it.
@@paulbrodie When you try the previous megaphone, try the "socket on the extension" trick. With your exhaust system it will be more about disrupting the exhaust flow to impede back flow. Otherwise, Anti reversion.
Great Work and good to see you are doing well! Those engines rev very (almost 10000 revs/min) for a push rod design. I like the Piva DOHC version using a vertical shaft for this engine. I think there is someone around doing replicas of those DOHC heads just in case 😉
Hi Paul, would you at some point in the future show how you made the nose fairing on Ruby 20. I know this may be a similar process to the tiger cub seat but never the less it would make an interesting episode. Best wishes from the Isle of Man.
Sounds great , i have watched with interest how you rebuilt that Aermacchie engine with all those fancy parts and clever engineering. I had one of those in the late 70,s but didn't ride it much as i was into MX and Enduro , just as a matter of interest what kind of horsepower/ kilowatts and top speed can you expect from those heavily modified engines?
Given the compression ratio of the aermacchi single, to kickstart it wearing flipflops is a mark of skill or sheer madness. Especially when the spark timing isn't yet perfect. (BTDT) :-)
When I go to the track I could care less about lap time, its all bout having fun with your friend creating memories... I do still own everyone on track tho... 😂
@@paulbrodie well in that case you have nothing to loose, so you may as well go to, Eric dubay 200 proofs, and allow it to slowly percolate into your being, note I said slowly
cool project. Reminds me so much of good vibes of when I rebuilt my 350/400 macchi TV , from a basket of parts to a replica ala d'oro racer high spec. Keep it go :)
Thanks. We are taking the Aermacchi down to the Salt Flats this August to see what it will do...
@@paulbrodie Damn! I had back surgery and can't drive until September. I want to be there to watch so bad.
I have a 1973 Aermacchi ss 350. runs awesome and I just got done converting a Honda starter for it.
Yes, I do believe In saw your post on FB. Good for you :)
Thanks for showing many Aermacchi videos, I’ve got two Aermacchis in Italy (not race bikes though) and it is just fantastic to have the opportunity to learn so much from your videos! I wish I was living nearby I would be at your door step everyday begging to learn more and more from you! Thanks a lot and wish you the Best!
Thank you. Sorry it took me this long to find your comments.. Aermacchi is going to the Salt Flats this August!
Congrats!!! Had no doubts.
Hi Paul,
It's probably 45 years since I was working on AMAL carbs so I had to sleep on it after watching vid..
It may be worth checking the actual shut off needle, it's rare but I have seen a couple that were longer than they should be (usually non-genuine parts but could be from a diferent AMAL?)
One other thing to check, because of the float pivot position, having carb tilted forward lowers the fuel level in float bowl.
If carb was designed specifically to be mounted vertical (on a Bonneville) this will lower fuel level in bowl compared to a Commando with 'race' manifolds. (10 degree angle)
It may be something else entirely but it's relatively simple to check fuel level which will be close to gasket surface.
I forget details as that style AMAL was pretty new when I was working on them (Mk I Concentric's were the 'common' carb)
Monoblock's were so much easier, fuel level with the 'pip' in middle of cover at whatever angle you were running, file contact point of shut off valve to adjust level (one piece plastic float, non adjustable).
We did check the float level and we did raise it up slightly. Thanks for your comments!
Paul. This is so awesome! That thing sounds wicked awesome!
Italian bike! Proud of it!
Yes !!
Congrats Paul ! Bike sounds QUITE ! angry ! Well done.
Thanks Jason. I think it sounds mean :)
Great pics of those races.. Thank you.
Great video! Really enjoyed seeing the race pics and to hear the bike running. Hopefully we can see it on the road soon. Thank you Paul!
Outstanding as usual Paul, thank you. You’ll get her sorted for sure, great sound from that mill. The race pictures were excellent!! Love to see more!
The sound of an Aermacchi is not easily forgotten. Incredible!
We have something in common... we both love the sound of an Aermacchi race bike! THANKS FOR WATCHING :)
It's a megaphone, every 4 stroke single is going to snarl with a megaphone, the real test is with the stock muffler mounted, does the bike have the valve timing to sound snarly, throttle off when decelerating through the gears.
@@paulbrodie I remember my ERS back 50 years ago. 32 mm Mikuni with jetting specs from Mert Lawwill. It ran Sooo much better with the Mikuni than it did with the Del Orto. I ran an open megaphone even though silencers were "required".
Awesome! The Italians build great sounding bikes often times they forgot the horsepower though! This from a Ducati guy.
Regrettably I had a ‘74 GT 750 project that I intended for the track. I didn’t strike when the iron was hot and the project made no sense as my track days wound down. Sold it all and finished up a Ducati 851 restoration. I guess you can’t do it all or take it with you!
Beautiful bike and great problem solving!
Getting closer! The only carb out of the box that ran "good" on a bike was an S&S. It took weeks of daily trial and error to put a rotax pulse jet type water craft carb on a Victory before it ran good enough to try a good, long test ride. (The S&S was just to big to fit the avaliable space ubder the tank. You will get there. Keep at it! And again, good to have you back on my feed.
It was a new carb to me, but I did re-jet it to the same specs as my previous carb...
great Race history Paul. Iam Glad to see you are Much Better Mate. The Bike Sounds Orsome. My Uncle Road Raced here in Australia and Always wanted Aermacchi. It was his Dream, that iam afraid never Got For filled Uncle Ian Is in His 80 s Now. i Now understand why he wanted one, after seeing your Great Build Here. Dave from Australia
Thanks Dave! I am feeling stronger.. Sorry that your uncle never got to own an Aermacchi.
Thanks for the insight of working on and tuning these beautiful machines. l remember seeing the road going versions as well as the race bikes in 1963/65 at Brands Hatch race track in Kent UK,..These bikes were expensive to buy, as were all Italian bikes even then..Compared to what was on offer in UK at the time these Bike really were exotica.
Thanks for watching and commenting...
Dear Paul, these are, again, some fantastic videos! Thank you so much!
My pleasure! Thanks for watching :)
The smile says it all. The bike sounds great.
Best wishes, Dean.
Thanks 👍
Love it when a plan comes together 🎉Blessings 🙏
Thank you very much!
Viva Aeromacchi ! This video brought a smile on my face. Incidentally, it looks like Steve Dulcich joined your team :)
Hello Paul, you’ve clearly worked very hard on the bike and it sounds so much better.
Well done! I knew you would not settle for the way the last video ended. Best wishes Kevin.
Thanks Kevin. Yes, it was good to hear the bike rev!
Thanks for the update Paul. Sounds like you mean business!
superb tone paul, well documented din from the dynamic duo,
that thing will sing once you get some rpm on it.😄👍
Yes, she needs to sing :)
Great to hear it run sounds good
Thanks 👍
Siiiiiii!!!!! 💪💪💪💪💪💪
Thank you!
It is always a pleasure to watch your adventures! Thank you, Paul.
I've got a '67 Ducati 250 scrambler I've owned since I was a teen. Comparisons between the Aermacchi and Duc are pretty stark. I've always thought the Aermacchis were a bit industrial compared to the OHC Ducatis, More low end but they really seem to just lose the ability to rev out like Ducatis. 5 speed versus 4 speeds with slightly tighter gear ratios to keep Ducati's engine on the boil. I've trail and gravel road ridden mine a fair amount before I got interested in bicycles.
She sounds ANGRY!
that sound better paul . did you sort the timing on the cub
If Duncan is who I think he is... he was one of my most favorite people to share the track with, always rode hard and clean - his 850 Commando was a good match for my 250 Ninja :)
great stuff Paul. it amazes me that you fabricate everything - so talented. Can you talk about the starter spinner you use on the rear wheel please
Thanks John. The starter belongs to a friend. It is just on loan. In use, the rear wheel wants to kick to the right, a lot, and then the bike has to be re-positioned. I want a starter where the rollers have a "dip" in the middle that would assist in holding the tire also in the middle. I think a new starter is about 1000 dollars.
Thanks Paul, any info would be helpful
Well done , enjoying your videos , I,m a GM truck mechanic by trade , but I also worked for a UK based bike race team running TZ 350s
Sounds great Paul and very healthy 👍👍👍👍
Beautiful sound Paul,lot of work on that bike,very nice, Congratulaciones,Enjoy!!
Hi paul it's nice to see you up and about her is a video on youtube Angelo Tenconi driving his Aermacchi Ala d'Oro 250cc
Yes, I am back to being active. If you sent a video link it did not come through..
I love seeing and hearing old race bikes run. Would love to see a video of Ruby running too.
I'm looking forward to when you get the timing sorted out. Only then can you really dial in that carb. What size is that Amal? And did you keep notes of the jetting used on the previous racer, with whatever carb that was used on it? One thing I learned about carb sizing is if the size is correct then uncorking the exhaust lets the carb flow more air so the venturi effect is stronger and flows more fuel with no need for changing jets. If the carb is too large it runs lean, signal is weaker, so you need to jet larger. If the carb is too small, the signal is much stronger, so it runs richer, and you need to lean the jetting. So once you get your timing you could "cork" your exhaust and compare your jetting to your "uncorked" exhaust. I discovered this first years ago with a Sportster that A guy put drag pipes on. The usual idea was to richen the jetting. That sure didn't work. I ended up having to solder up jets and drilling them undersized to get a correct mixture. Later on I found out the later Sportsters had a 36mm carb on them when the earlier had 38mm carb. I also found this true on other engines, British and American. The 93" engines I've built always end up needing to be leaned way off the charts, meaning they would work fine with a larger carb.
Tha Amal is a 34mm bored out to 35mm. I did use the same jetting, but I changed the megaphone. I am going back to the previous megaphone to see what happens. Thanks for commenting :)
@@paulbrodie Yeah that can be telling. What is the intake valve diameter? I couldn't find anything on the internet or Ebay about valve diameters. I'm guessing you have a 11:1 a piston in it.
@@paulbrodie When you try the previous megaphone, try the "socket on the extension" trick. With your exhaust system it will be more about disrupting the exhaust flow to impede back flow. Otherwise, Anti reversion.
Great Work and good to see you are doing well! Those engines rev very (almost 10000 revs/min) for a push rod design. I like the Piva DOHC version using a vertical shaft for this engine. I think there is someone around doing replicas of those DOHC heads just in case 😉
Nice!!..👍🗽🇺🇸
Thanks...
Sounds great,
Hi Paul, would you at some point in the future show how you made the nose fairing on Ruby 20. I know this may be a similar process to the tiger cub seat but never the less it would make an interesting episode. Best wishes from the Isle of Man.
My brother and I would go to the drag strip and call all the bike guys the evil kenivels, lol. Y’all are crazy.
I am not a drag racer. I am a road racer. Big difference.
@@paulbrodie both are crazy! Lol. I’m not that good on two wheels lol.
350 main jet is for running on methanol ! 😁
Sounds great , i have watched with interest how you rebuilt that Aermacchie engine with all those fancy parts and clever engineering. I had one of those in the late 70,s but didn't ride it much as i was into MX and Enduro , just as a matter of interest what kind of horsepower/ kilowatts and top speed can you expect from those heavily modified engines?
Many thanks! My Aermacchi race bike had 35 rear wheel HP and was good for 120 mph on the straight :)
Given the compression ratio of the aermacchi single, to kickstart it wearing flipflops is a mark of skill or sheer madness. Especially when the spark timing isn't yet perfect. (BTDT) :-)
It's pretty hard to kick start a bike that has no kickstarter!!
Dell Orto, please!
I'm building a replica of the race bike that got stolen... It had an Amal carb, so that's why...
Hi Paul. Couldn't it be that the manipulation of the choke has affected the function of the rest of the carb?
I don't think so. I am going to reinstall the previous megaphone because I think that is going to help a lot...
When I go to the track I could care less about lap time, its all bout having fun with your friend creating memories... I do still own everyone on track tho... 😂
How are you Mr.Paul?
The Sound of Singles.
wack a S an S carb on there she be goooooooood
👍👍😁😁,,
did gary get his $200 back when the belt broke ?😄
No, in racing you have no idea what is going to happen. He was very happy with the entire experience, and we are still friends :)
you don't look well, are you eating properly?
Well, I have bone cancer... Do you think that could be something to do with how I look?
@@paulbrodie well in that case you have nothing to loose, so you may as well go to, Eric dubay 200 proofs, and allow it to slowly percolate into your being, note I said slowly