Amal carbs setup for SFC?

arancia

arancia

Senior member
Location
Arizona, USA
One of my long term projects is a drum SFC REPLICA - note REPLICA, to look like 11000 series, no intention to try to pass it off as anything other than a tribute copy for use on track days and it will certainly be a bit of a mongrel to start with - most of the parts are on hand now.
I have a two left side Amal 1036 carbs, one missing its cap, slide and spring otherwise both are in fair condition accepting that I'll have to rebuild with appropriate jets, slides, needles, gaskets etc.
If anyone has a right side body and would consider a trade, please PM me.

Tim P's Green Book calls the versions fitted to SFCs 1036/6 and L1036/7 and gives jet, needle and slide numbers. Does anyone know what distinguishes /6 and /7 and any information on how these were mounted - did they have insulator blocks or sleeves, etc?

Thank you for any guidance you can share.
 
arancia said:
One of my long term projects is a drum SFC REPLICA - note REPLICA, to look like 11000 series, no intention to try to pass it off as anything other than a tribute copy for use on track days and it will certainly be a bit of a mongrel to start with - most of the parts are on hand now.
I have a two left side Amal 1036 carbs, one missing its cap, slide and spring otherwise both are in fair condition accepting that I'll have to rebuild with appropriate jets, slides, needles, gaskets etc.
If anyone has a right side body and would consider a trade, please PM me.

Tim P's Green Book calls the versions fitted to SFCs 1036/6 and L1036/7 and gives jet, needle and slide numbers. Does anyone know what distinguishes /6 and /7 and any information on how these were mounted - did they have insulator blocks or sleeves, etc?

Thank you for any guidance you can share.
Click to expand...

1036/6 und L1036/7 - Mainjet 350, Leerlaufdüse 35, Nadel-
düse 107, Nadelstellung 2, Nadeltyp 0, Schieber 3. Von Amal wur-
den Anfangs 1972 nur 200 Vergaserpaare geliefert.



Regards Rainer
 

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I have only seen one real SFC in my life many years ago. The few I have seen since then were all replicas. And that was because the owners told me so. I am not an expert and probably could not tell a real one from a replica.

Now I am wondering, how close can you take a standard 750 and make it look like a real SFC? I understand some of the motor internals are different but you can't see that looking at the bike.

If time and money were not an issue, is it possible to make one look perfectly like a real SFC that may even fool the experts? I know the serial number would probably give it away but let's pretend it does not. Just wondering so in my dreams if I even see one for sale how can I tell?

The reason I ask is, I personally know someone who bought a first year 1959 Triumph Bonneville's that started life as a different model Triumph and sold as the real thing for big $$$$. There are more 1959 Triumph Bonneville's on the road today than the factory ever made. Once you have the correct cylinder head, making the "replica" is easy.
 
1200ts said:
I have only seen one real SFC in my life many years ago. The few I have seen since then were all replicas. And that was because the owners told me so. I am not an expert and probably could not tell a real one from a replica.
Click to expand...
Confessions of an obsessed SFC fan:

I have two '74 models, one Italian market spec bought in the south of Italy and ridden home to UK in the late 70s before many people knew that they were special, the other is US spec with ND instruments and turn signals bought locally in US almost as long ago because the owner didn't really know what it was other than "a Laverda race bike". I saw numerous '74 models in SoCal in the 80's and early 90s that I have no reason to believe were not genuine. Back then the asking prices were reasonable for getting-on-for-20-year-old race bikes but I had no foresight of where things were going.

At the time to me they were race bikes and I raced and abused them severely because they were fun to ride on road and track, no idea then that people would now pay silly money for these toys, perhaps I should have kept them nearer pristine instead of crashing them and causing motor damage that means total rebuilds but boy did I have fun on them then, isn't hindsight wonderful?

On visits to Italy in the '90s I saw lots of what seemed to be original 8000 and 11000 series bikes and friend Larry S restored a very early drum SFC that I enjoyed riding briefly. Having been unable to find an original like that I decide I would build a REPLICA - not a fake but a bike that had the spirit of the original even if nowhere close to a perfect copy. I started gathering parts a very long time ago and think I'm close to initial assembly.

There are telltales that are difficult and/or very expensive to replicate on originals and with the efforts of Tim I, Larry S and still Marnix over many years there's a pretty good list of where what are considered to be originals reside.

So, I have no intent to try to fool anyone, it'll be a blatant copy and will remain that way - I'm a passionate admirer of the efforts made in the early 70s to make durable race winners and would like a bike that looks like those, that's all. A framed print of Brettoni in the "Vince" picture is on the wall in my family room! That's how sad my deluded state and obsession has reached. The resulting bike won't be for sale while I'm alive, if it's ready before I feel too old to race it then it will appear in the AHRMA GP series just as my '74 models did many years ago.
 
Since owning an 1960's Triumph Bonneville with Amal carbs, I've referred to those pieces of shit as "Animal" carbs because they were about as effective as a hamster shovelling fuel in with a teaspoon. I replaced them with Mikunis on the Bonnie for a world of difference in performance and reliability.
 
arancia said:
A framed print of Brettoni in the "Vince" picture is on the wall
Click to expand...

What's this Vince pic on the wall. BTW I have sat on at least 6 different ones over the years, never got offered a ride, by sat that doesn't mean actually got my feet on the pegs while sitting, that's a different kettle of fish with my body shape.
 
K whats the story, bike name, rider name, circuit name. Why Vince? This is a new bit of info for me. The name Brettoni I have heard of, he of the warn through boots if I have that story right?
 
1200ts said:
I have only seen one real SFC in my life many years ago. The few I have seen since then were all replicas. And that was because the owners told me so. I am not an expert and probably could not tell a real one from a replica.

Now I am wondering, how close can you take a standard 750 and make it look like a real SFC? I understand some of the motor internals are different but you can't see that looking at the bike.

If time and money were not an issue, is it possible to make one look perfectly like a real SFC that may even fool the experts? I know the serial number would probably give it away but let's pretend it does not. Just wondering so in my dreams if I even see one for sale how can I tell?

The reason I ask is, I personally know someone who bought a first year 1959 Triumph Bonneville's that started life as a different model Triumph and sold as the real thing for big $$$$. There are more 1959 Triumph Bonneville's on the road today than the factory ever made. Once you have the correct cylinder head, making the "replica" is easy.
Click to expand...
You can build a machine, engine included, identical to how the originals were leaving the factory, if you know what is needed and who to do it. For no more money than some people are putting into low grade replicas.
Which is why there are so many replicas out there, some parading and being bought and sold as the real thing.
Electronica apart. It can be done but work needed would be a lot more.

Paul
 
Vince said:
K whats the story, bike name, rider name, circuit name. Why Vince? This is a new bit of info for me. The name Brettoni I have heard of, he of the warn through boots if I have that story right?
Click to expand...
Laverda wins! Bike is a 1970 SF, rider Augusto Brettoni at Monza.
 
Paul Marx said:
You can build a machine, engine included, identical to how the originals were leaving the factory, if you know what is needed and who to do it. For no more money than some people are putting into low grade replicas.
Which is why there are so many replicas out there, some parading and being bought and sold as the real thing.
Electronica apart. It can be done but work needed would be a lot more.

Paul
Click to expand...
Are the trick crankshafts still available?
 
Tippie said:
Are the trick crankshafts still available?
Click to expand...
Drum brake cranks aren't trick.
Bits for making a disc brake crank are without doubt available. Ask the people who do Laverda cranks.
You can even click and pay at Andy's.

Otherwise, it's only a question of knowledge and know-how.
And money.

I should think that nowadays, the gearboxes are more of a problem than the cranks.

Paul
 
As far as I am aware, the parts to build a light SFC crank have become very rare. Sometimes some outer webs are available, but original inner webs and the centerpiece have become extremely rare. Same counts for the gearboxes and several other engine parts by the way.

As Paul rightly states, the drum brake SFCs all had a (highly polished) SF type crankshaft. With these cranks more attention went to the balancing, that’s for sure.

The majority of the replicas are drum brake SFCs, because the frame is easiest to modify. To build a decent looking Electronica SFC replica is one hell of a job..

Marnix
 
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