A10 twin carb head

[Andyhosie]

Hi all. I have a pretty decent A10 twin carb head no valves etc. I am wanting to swap it for a 1954 A10 swingarm frame.
I'll  post some pics later . Cheers
Andy

[zurferjoe]

Hi Andy , the head is it alloy or iron with twin carbs ,and any pics would be good .Cheers Harry

[Rocket Racer]

Andy,
 is it worth talking with Mike Reilly, he might have a 54 frame.
You could always modify a later frame to '54 spec.
Tim

[duTch]

 Probably no help, but I saw a S/A frame at a swappie this morning, but as I've no need for one didn't get a price or other details.... (he also had a rigid M21).

 Which leads me to a question;
  I'm not sure if it was a early frame or for a single because something I noticed the other night in the '54-'57 twins (A7/10)Parts list I have, is the swing arm frames in the drawing have the oil pump curve  ...and comparing that to the singles (B31/33) frame, the only difference I could see in the B31/3 Spares list was the steering lock lug on the singles one....
 This frame had that lug, but also the pump curve had been welded in..

 So the question is; What is/are the differences between an early and late swing arm frame ?? (Apart from the obvious ID prefix)

 Disclaimer:did  this on the phone- half price drinks at the pub  (2-4-1)..>two for one<

[JulianS]

The 1954 season swinging arm frames did not have the lug for the steering lock, that came for 1955 season on frames (plunger too). (except RGS).

Same with B series frames, except Gold Star which did not have the steering lock.

No kink in twin frames. The parts book illustration is copied from the B series book.

[duTch]

 

The 1954 season swinging arm frames did not have the lug for the steering lock, that came for 1955 season on frames (plunger too). (except RGS).

Same with B series frames, except Gold Star which did not have the steering lock.

No kink in twin frames. The parts book illustration is copied from the B series book.

 Geez- no surprise they went broke - I already asked about the Plunger ones a while ago....

[trevinoz]

The 1954 and early 1955 frames don't have any cast lugs on the front down tubes.

[duTch]

 

The 1954 and early 1955 frames don't have any cast lugs on the front down tubes.

 Ok sooo- what do have instead? Are there lugs or similar welded on ? The one I saw yesterday didn't have a lower left one there, just a hole where it's broken out....

[trevinoz]

Dutch, they just had four tubular lugs, the same as the top two on later frames.

[duTch]

 Thanks Trev, I'll maybe look at them a bit closer when I see some

[kiwipom]

The 1954 and early 1955 frames don't have any cast lugs on the front down tubes.

hi Trev, my bike is a 1954 Gold Flash and has lugs so dont know if the frame has been changed, cheers

[trevinoz]

Hi Kiwi, is your frame a CA7 or GA7?
Only the last GA7 & GA10 frames were fitted with four cast lugs.

[chaterlea25]

Hi All,
I have read 4 lug unnumbered frames were supplied as spares in the sixties
they have fittings for the rear brake on both sides so they could replace any year type
Or I could have been told a crock of sh1t 

John

[trevinoz]

I think that you are right, John.
I think that there is someone on this Forum with one.

[kiwipom]

Hi Kiwi, is your frame a CA7 or GA7?
Only the last GA7 & GA10 frames were fitted with four cast lugs.

hi Trev, the receipt says:-  CA7 12137. cheers