Author Topic: a 10 frames  (Read 892 times)

Offline shorty

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a 10 frames
« on: 25.04. 2017 15:37 »
Hi, my first post, Does the a10 rocket gold star have  an F a7 prefix to the frame number,?? or are they all  G A10 prefix,  the frame i am looking at has the lower cast engine lugs, i have no more info than this at the moment.thanks in advance for your replies.

Online JulianS

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Re: a 10 frames
« Reply #1 on: 25.04. 2017 16:35 »
FA7 is an A7 or A10 frame from the 1958/59 season. If its got 4 lugs it is a later frame, maybe a factory replacement on for a crashed bike.

The RGS would have a GA10 frame number, all except the first 2 which had GA7 frames. See article written by Brian Pollitt and originally published in the BSAOC magazine, "The Star", in July 1996.

http://goldstarspitfires.weebly.com/uploads/1/1/7/0/11702298/brian_pollitt_article.pdf


 The 4 lugs dont make it an RGS frame.



If you have the Haynes A10 manual you can see an interesting frame, if you study the photos. Page 38 shows 4 lugs, a rod brake pivot (not in use) and a crossover brake shaft. This would be a universal factory replacement frame.



Offline shorty

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Re: a 10 frames
« Reply #2 on: 25.04. 2017 20:11 »
Thanks for your reply, very interesting article.
i think from bsa 0c list on internet the frame looks like it is a 1958 super rocket, i just didnt think that the super rockets had the 4 cast engine mount lugs on frame ?

Online chaterlea25

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Re: a 10 frames
« Reply #3 on: 25.04. 2017 20:26 »
Hi and Welcome Shorty *smile*
There are several other differences between the SR and RGS frames
A search on the forum will lead to several topics
Some export and maybe special order frames had the 4 lugs
It is also not unknown for frames to be modified *work*
Some decent  photos of the swingarm pivot area the battery platform brackets and the number stamping
should help sort out what it is

John
1961 Super Rocket
1963 RGS (ongoing)

Offline shorty

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Re: a 10 frames
« Reply #4 on: 25.04. 2017 21:47 »
Thanks chatterlea, i have looked at various items on the forum and they show the swinging arm pivot with solid shaft for RGS and no side car mount,thanks for info, i will know more with a physical look at frame tomorrow.

Online trevinoz

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Re: a 10 frames
« Reply #5 on: 25.04. 2017 22:16 »
GA7 frames with four cast lugs are not at all uncommon.
There are examples with the solid swinging arm spindle, notably those supplied to South Australia Police in about 1962.

Offline bob flashman

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Re: a 10 frames
« Reply #6 on: 26.04. 2017 23:25 »
Hi i have a question about A10 frames my fame has the no BA7 1870  with a engine no of DA10 9522 the bike is a 650 cc  swinging arm the V5C says the bike is from the year 1956 is this correct the reason for asking is i need a centre stand so need the right year.thanks for any help.



Online JulianS

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Re: a 10 frames
« Reply #7 on: 27.04. 2017 09:02 »
BA7 is a rigid frame prefix.

You probably mean EA7 1870 which is a swinging arm frame number from 1956 season.

DA10 9522 is from the 1960 season.


Offline bob flashman

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Re: a 10 frames
« Reply #8 on: 27.04. 2017 16:21 »
Many thanks JulianS but the frame is a swinging arm frame and its stamped BA7 .The stamping looks to be original with the letters and numbers being the same size.

Online JulianS

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Re: a 10 frames
« Reply #9 on: 27.04. 2017 17:08 »
Swinging arm frames were;

CA7 prefix for 1954 1955

EA7 prefix for 1956 1957

FA7 prefix for 1958 1959 and GA7 prefix for 1960 1963.

Link takes you to BSAOC year listings;

http://www.bsaownersclub.co.uk/yearlisting.html

For 1956 frame expect to see a hollow swinging arm spindle, on the offside a rear brake cable stop pointing straight back for hub lever pointing upwards and no sidecar mounting lug on the nearside pillion footrest frame loop (which featured on the 1958 on frames)

You could post a photo someone here should be able to advise.

Online KiwiGF

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Re: a 10 frames
« Reply #10 on: 27.04. 2017 23:26 »
My bike is a 56 with pretty good provenance, it has what I thought was a side car mounting lug on the left pillion hoop, is this not the norm? Or is not a side car mount?

Pics attached.
New Zealand

Last had an A10 in 1976, in 2011 it was time for my 2nd one.

1956 Flash Frame EA7-168x Eng. CA10 913x, left BSA together for Liverpool, 5th Dec 1955.

B31 “hot rod” (yeah right)

Armstrong Siddeley Whitley for rainy days (with wife).

GL1800 Goldwing not sure why yet

Online RichardL

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Re: a 10 frames
« Reply #11 on: 27.04. 2017 23:32 »
KiwiGF,

To me, what you have there is a frame left over from '55 production, as that is the brake pedal boss for a rod-pull brake. You do not have a side-car lug.

Richard L.
Plan on signing up for the world-wide 2017 DISTINGUISHED GENTLEMAN'S RIDE on September 30, 2018. Watch website at https://www.gentlemansride.com for details.

Online trevinoz

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Re: a 10 frames
« Reply #12 on: 27.04. 2017 23:57 »
Kiwi, that is strange.
Can you fit your finger between the bottom of the battery tray mounting bracket and the cross tube?

Online duTch

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Re: a 10 frames
« Reply #13 on: 28.04. 2017 00:56 »

 (Fairly sure)My Plunger A10 has a BA7 S 191** frame # , which I've decided is from '55/6.

 Just thinking that Swing Arm models before '57/8 may have been built workout sidecar lugs because Plunger frames were more suitable and produced up to '57...just guessin'...?    *dunno*
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online KiwiGF

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Re: a 10 frames
« Reply #14 on: 28.04. 2017 03:24 »
Kiwi, that is strange.
Can you fit your finger between the bottom of the battery tray mounting bracket and the cross tube?

If am measuring this gap correctly nope, it's only about 1/4" enough for a pencil....as per attached pic

New Zealand

Last had an A10 in 1976, in 2011 it was time for my 2nd one.

1956 Flash Frame EA7-168x Eng. CA10 913x, left BSA together for Liverpool, 5th Dec 1955.

B31 “hot rod” (yeah right)

Armstrong Siddeley Whitley for rainy days (with wife).

GL1800 Goldwing not sure why yet