Author Topic: altette horn  (Read 2025 times)

Offline tedbill1

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altette horn
« on: 16.02. 2014 17:50 »
help needed part number for altette horn bracket on 59 a10 and picture please
A Billington
Bedfordshire England
a10 59 gold flash swingarm

Offline Beezageezauk

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Re: altette horn
« Reply #1 on: 16.02. 2014 19:46 »
Hi tedbill,

What model A10 do you have?

There were two types of horn for A10's in 1959.  Models with a nacelle type headlight arrangement had a small Lucas horn (part number 19-2035) tucked away inside the nacelle.  Models without a nacelle were fitted with Altette horns but, going by the parts list, the bracket came with the horn and the whole unit was part number 42-9045.

Beezageezauk.






Offline a101960

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Re: altette horn
« Reply #2 on: 17.02. 2014 14:40 »
Taff the horn is your best bet. http://taffthehorns.com/  All you want to know about Altette horns, brackets, and all things horn related.
John

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Re: altette horn
« Reply #3 on: 17.02. 2014 19:12 »
Hi Ted

I got my Altette bracket from Lyford classics. I had a flat bracket but it would not clear the dynamo so you need to ask them for a cranked bracket.

Jim
1959 A10 SR
1938 Wolseley 14/60
1955 Ferguson TEF20 tractor
1965 Ferguson 135 tractor
1952 Matchless G80 rigid
1960 BMW R60
1954 Matchless G80S
1955 Ariel 500 VH
1951 Sunbeam S7DL
1960 Matchless G12 with Watsonian Monza
......and loads of lawnmowers

Too old to Rock and Roll but too young to die  (Jethro Tull 1976)

Online terryg

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Re: altette horn
« Reply #4 on: 17.02. 2014 21:32 »
I've been told that the flat bracket is correct and is to be used with a spacer on the engine mounting stud. The cranked bracket is also a solution.
Terry
'57 'SR', '59 SR, '63 RGS

Offline 1959superocket

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Re: altette horn
« Reply #5 on: 18.02. 2014 17:36 »
The one on my 59 Super Rocket is the Lucas HF1234 with a black central disc, mazak rim and notched casing at the rear but I believe it should have the silver wavy central disc for 59 and no notch at the back but you never know BSA probably used whatever came to hand.
Taff the horns website might help you to find out the correct fitment as suggested above.

Regards

Stuart

Offline tedbill1

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Re: altette horn
« Reply #6 on: 18.02. 2014 19:13 »
thank you one @ all love this forum  *wave*
A Billington
Bedfordshire England
a10 59 gold flash swingarm

Offline trevinoz

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Re: altette horn
« Reply #7 on: 18.02. 2014 20:39 »
Terry,
                 The flat bracket is not correct. The double set one is.
Trev.

Online terryg

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Re: altette horn
« Reply #8 on: 28.02. 2014 10:06 »
Hello Trev - after a bit of searching around I see you are right about the cranked bracket for '59.  The parts book for the '58 Super Rocket clearly shows the horn assembly with a cranked bracket (19-2035).

In an earlier ('54 - '57) A series parts book, there's a copy of it on the Rocket Men site at...
https://onedrive.live.com/view.aspx?cid=25607C70B0CF572E&resid=25607C70B0CF572E%21565&app=WordPdf&wdo=1
the electrical equipment page shows two Altette looking horn assemblies.  One with a flat bracket (Plunger, 67-9068) and one with a cranked bracket (Swinging Arm, 42-9045).

My post above on the flat bracket followed a conversation with a well known Welsh restorer of Altette horns specifically in respect of a horn for my real RGS, which I simplistically thought must apply to all A10s.  He maintained that, like Gold Stars, the flat bracket is the one to use and duly supplied both restored horn and bracket - and very good they look.  Is his assertion correct?  I wonder.

Unhelpfully the majority of sales literature photos from way back show the timing side of machines, obscuring the horn detail.  Whether BSA stuck rigidly to particular types may, I suspect, have depended upon availability, and fit, on the day of assembly.

I must stop this now, before getting sucked further into concours nit-picking!
Terry
'57 'SR', '59 SR, '63 RGS

Offline trevinoz

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Re: altette horn
« Reply #9 on: 28.02. 2014 22:13 »
Terry,
                  The Lucas parts book has the cranked bracket for the swinging arm twins every year except 1955, which makes no sense.
The horn on the RGS is no different to the horn used on other twins with no nacelle.
The picture is scanned from the original road test of the RGS.
To my mind, the horn is standing well clear of the dynamo which would indicate a cranked bracket.

Trev.

Offline trevinoz

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Re: altette horn
« Reply #10 on: 01.03. 2014 21:37 »
Further to this.