Can anyone assist please: is this a standard Amal TT carburettor? The inlet tube is missing. I'll be in touch with Surrey Carbs later, but the Amal publication says that the air tube must be factory fitted. Obviously that won't happen although I do have access to a lathe.
I can't work out how the air tube could fit on this thread. 1.80 ins outside diameter.
It turns out this seems to be an AMAC TT carb. So now I need to find out if it should even have an air tube. The one it had yesterday made a successful bid for freedom on the A3 last night, somewhere west of London. Looks like a bit of exasperating lathe work...if I can find out what shape it is supposed to be.
It seems a shame, but another carb beckons...the money pit is opening up!
from Paul Norman
....but he doesn't seem to have them anymore @#$%^$#!
Lordy, what a beautiful machine you have there.
Thanks very much, Michael. So he has no more but at least I now know what it should look like, so it might justify the presence of my seldom used lathe! I didn't even know exactly what carb it has...Amac or Amal...
....of the Amal in my stash.
Thanks Michael. I'll do some checks after work this evening.
hello I do have a Amal parts cataloge in my persestion and there is a lot of information about the Amal TT 10 and TT15 and GP Carbuettors so anyone needing some info contact me on firstname.lastname@example.org yours anna J
Michael - thanks for the pictures - it appears to be identical. I can't quite work out what sort of bell mouth yours has. I doubt if its absence will make the slightest difference on the road anyway. But I should cover the thread anyway.
And thanks, Anna. I found the Amal TT instructions on the internet the other day. I'll start playing with it on Saturday (weather and wife permitting...)
That's interesting, thanks, Michael.
Surrey Cycles (the Amal man) told me the current TT inlet will not fit because the new versions of the carb have an internal thread where mine is external. That's why he thought it was an Amac.
I've found 45mm OD fittings with air filters, which claim to contain a bell mouth, but they are held with Jubilee clips (I think to fit Mikuni). Not pretty (but probably practical).
I see that, just like the post war lists, yours tells the owner to send in his carb so the air tube can be properly fitted... some hope!
Your carb is an Amal 10TT and was fitted to standard Inters from 1932 to '39. This was developed from the 1920s Amac racing carb after the carburettor companies had been AMALgamated during the depression. The Amal type 27 track carb looks to have a similar size bellmouth, but I have never compared them to know for definite. Try Martin Bratby as he makes many carburettor parts as this is his speciality and he is very knowledgeable on older carbs. You will need to turn back technology if you buy by post as he doesn't do cards, only cheques or postal orders.
How do you contact Martin Bratby?
Apparently Martyn now uses only his mobile and no longer a land-line. This contact number was mentioned recently on the WD Motorcycle forum. 07772 169524.
He's usually at Kempton Park or the forthcoming Netley autojumbles (Stafford too, I think)
Thanks Richard (again!). Weirdly I found the air tube I thought was lost along the A3 on a workbench close to where the bike was stored. With the George Dance knee grips.
Hi folks, apologies . . . I don't come in often.
I was just looking at one of my own items on google and it came up with this thread - just to be clear , the early Amal TT's were fitted with 'spun' bellmouths with an internal thread as shown in David Cooper's original photograph and query.
I believe they switched to the more normal alloy bellmouth with external thread in approximately 33 or 34 .. . but dont quote me on this.
I am not sure if anyone is still after these - but I still keep one in my stock as a future pattern to have a new batch made. If truthful, the original ones I supplied came from same as Martyn Bratby and were excellent . . . but no more available.
If I get enough interest, I will consider finding a new supplier and have some made. I have even considered making them myself - not spun, but from billet on my own CNC .. .. but they would be very expensive (and involve a lot of excess swarf!). call me on normal email if interested: email@example.com
ps - we have all Amal TT type bellmouths available, including the longer type fitted to later Amal RN's and TT on racing models. We are also just in process of getting a new batch of Amal TT and RN throttle slides available . . . as well as many other original pattern of parts to fit Amal TT, RN and early GP models.
I'm probably one of the few people who might be interested, Paul. I've not seen another carb like mine, but there must be others out there. From photos, the early bellmouths were shorter and widened more quickly. Previous owner some decades ago added the one I now have - which is longer (and thus as I understand it theoretically better), and also had nice rounder inlet edges (also better than sharp edges...). But it is more or less parallel until it starts to narrow down as a can be seen in my first picture. I don't intend to race it...
...from various contacts here David. Just wanted to comment on the bike. What a beaut! Lots of trick bits, very clean and sits so well. The damper anchored on the tank and the high level front brake adjuster. The brooklands can sits well on a very nicely formed silencer pipe. The Dunlop seat and inverted levers. I’m guessing it’s about 1934? Great to see, and here that you ride it. Great machine !