BSA Serial number ID??? Any experts here? - The Jockey Journal Board

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Old 07-18-2011, 02:19 PM   #1
myke
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Default BSA Serial number ID??? Any experts here?

I just purchased a 1956 A7.

The engine is stamped DA7R XXX Anyone have any idea what that is? I looked at the BSA serial number guide and it does have the number.

Here's a picture.


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Old 07-18-2011, 04:23 PM   #2
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Default Re: BSA Serial number ID??? Any experts here?

Looking at the guide over at bb.com, I dont see any listings starting with DA7R
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Old 07-18-2011, 05:54 PM   #3
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Default Re: BSA Serial number ID??? Any experts here?

What's on the frame?? 56 numbers should be CA7-2701 and up

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Old 07-18-2011, 06:16 PM   #4
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Default Re: BSA Serial number ID??? Any experts here?

500cc twin Got some feelers out across the pond for you. Hopefully some one chimes in

Last edited by bobbydeville; 07-18-2011 at 06:27 PM.
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Old 07-18-2011, 07:15 PM   #5
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Default Re: BSA Serial number ID??? Any experts here?

Got some friends over at Biggles Bobbers lookin for ya, they'ed like to see some more pix of the whole engine to help identify it for you. Heres a link to the thread.

http://www.dirtybobbers.co.uk/forum/...p?topic=3435.0 hope the link works, Great bunch of guys over there!
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Old 07-18-2011, 07:45 PM   #6
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Default Re: BSA Serial number ID??? Any experts here?

As far as I know, there never was a D prefix on A7 motors. Nor was there an "R" designator. The "R" was an A10 thing, went on Rockets, Super Rockets, Spitfires and RGS motors.

But there's a lot I probably don't know about A7 numbers...
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Old 07-18-2011, 07:55 PM   #7
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Default Re: BSA Serial number ID??? Any experts here?

Thanks for all the help so far. I will post some pictures of the engine later.

The frame is a FA7A with appears to be a 1959 Scrambler. Is that frame rare or desirable?

Here is a picture of the bike. Notice a later tank too. It does not fit the frame.


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Old 07-19-2011, 05:53 AM   #8
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Default Re: BSA Serial number ID??? Any experts here?

I've got FA7A to be a 1959 Spitfire frame.

Looks like you have a bitsa.

Good looking bitsa.

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Old 07-19-2011, 06:54 AM   #9
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Default Re: BSA Serial number ID??? Any experts here?

DAXXXR , DAxxxSR.. was found on the A-10 motors,, I would look on your transmission for letters. You may have a Gold Star Catalina frame, there was a Gold Star Clubman that is a 500. they would be stamped DB
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Old 07-19-2011, 08:27 AM   #10
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Default Re: BSA Serial number ID??? Any experts here?

Cool looking machine
If it was a catalina goldstar frame it would be stamped CB32C-xxx.Being stamped a7 makes it a 500 or 650 twin frame not a single cylinder frame as it would have a kink in lower r/h frame tube to clear oil pump.
does anyone know what the HHC stamps refers to?
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Old 07-19-2011, 08:34 AM   #11
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Default Re: BSA Serial number ID??? Any experts here?

Quote:
Originally Posted by Daturat100r View Post
does anyone know what the HHC stamps refers to?
357 camshaft and high compression

Though I donn't know of any A7's that came with a 357
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Old 07-19-2011, 11:52 AM   #12
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Default Re: BSA Serial number ID??? Any experts here?

The plot thickens. Could someone have stamped this engine?

Did BSA have replacement cases that were not stamped?
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Old 07-19-2011, 04:40 PM   #13
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Default Re: BSA Serial number ID??? Any experts here?

it looks like the engine was grinded off and restamped to me
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Old 07-19-2011, 04:42 PM   #14
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Default Re: BSA Serial number ID??? Any experts here?

Quote:
Originally Posted by hotsos View Post
it looks like the engine was grinded off and restamped to me

Was gonna say that,,but thought it may be the photo
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Old 07-19-2011, 05:04 PM   #15
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Default Re: BSA Serial number ID??? Any experts here?

Quote:
Originally Posted by hotsos View Post
it looks like the engine was grinded off and restamped to me
It sort of does but it sort of doesn't.

But..... was trying to say it without saying it first time I posted in this thread....there's no such thing as that number, so it must be ground
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Old 07-19-2011, 05:06 PM   #16
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Default Re: BSA Serial number ID??? Any experts here?

Have to say, I can't see why anyone would fudge the engine # less it was hot and they were worried about getting caught
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Old 07-19-2011, 05:17 PM   #17
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Default Re: BSA Serial number ID??? Any experts here?

Quote:
Originally Posted by Scavenger View Post
Have to say, I can't see why anyone would fudge the engine # less it was hot and they were worried about getting caught
Unless they wanted the "7" and the digits to match a frame? Who knows, people are insane.

My guess is it's an A10 motor because I can't see someone adding the HHC...if they didn't know enough to know that they just made up a nonsense serial number, they sure as shit don't know HHC.
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Old 07-19-2011, 05:18 PM   #18
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Default Re: BSA Serial number ID??? Any experts here?

well, if the frame didnt match then maybe the did it to compy with the cops, or they just needed to match "something" to thier title after replacing the engine at some point. who knows, lots of reasons to restamp something besides being hot
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Old 07-19-2011, 05:22 PM   #19
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Default Re: BSA Serial number ID??? Any experts here?

Well I do have the legal title with the same numbers that are stamped into the case.

In person it does not look like it was ground unless they ground all the of case to look the same. I just cleaned that area with carb cleaner so it looks different in color.
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Old 07-19-2011, 05:25 PM   #20
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Default Re: BSA Serial number ID??? Any experts here?

Quote:
Originally Posted by hillbillyhell View Post
Unless they wanted the "7" and the digits to match a frame? Who knows, people are insane.

My guess is it's an A10 motor because I can't see someone adding the HHC...if they didn't know enough to know that they just made up a nonsense serial number, they sure as shit don't know HHC.

Very good point
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