Author Topic: What kind of numbers are these!??  (Read 515 times)

Offline coater87

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What kind of numbers are these!??
« on: 21.07. 2017 05:36 »
 These are the numbers on a swing arm motor. Whether A7 or A10 I have no idea.

 Any thoughts ?
Central Wisconsin in the U.S.

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Re: What kind of numbers are these!??
« Reply #1 on: 21.07. 2017 06:32 »
I suspect the short answer is not the original number stamping.
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Re: What kind of numbers are these!??
« Reply #2 on: 21.07. 2017 07:32 »

 Looks dodgy *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
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Online Klaus

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Re: What kind of numbers are these!??
« Reply #3 on: 21.07. 2017 08:25 »
Looks strange, but I guess the long figures are a Date 19658 can mean August 65.
But whats about the crank inside  *dunno*A7 had a shorter strocke than A10
Never seen befor is the prefix Z.
I had a crankcase stamped DA7 , asking the BSAOC, this combination never left the faktory, but the figures looks like original punshes.
Maybe a Monday engine *eek*


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Offline Bsareg

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Re: What kind of numbers are these!??
« Reply #4 on: 21.07. 2017 08:58 »
I remember  reading an article about a gold star stamped with a BC prefix ( a humble c10 or c11 prefix ) straight from BSAS .  Suppose the chap just picked up the stamps in the wrong sequence .
C11,B40,B44 Victor,A10,RGS,M21,Rocket3,REBSA

Online JulianS

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Re: What kind of numbers are these!??
« Reply #5 on: 21.07. 2017 09:26 »
The case looks polished. I think an original number has been ground off and this one stamped on.

ZA7 3 does not exist as an original prefix and the stamper might have meant ZA7S forStar twin.

ZA7 was an early long stroke prefix. The inside of the crankcase should give a clue whether long stroke or not.

ZA7S and ZA7 numbers did not reach 19653.


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Re: What kind of numbers are these!??
« Reply #6 on: 21.07. 2017 11:16 »
Quote
...ZA7 was an early long stroke prefix. The inside of the crankcase should give a clue whether long stroke or not...

 To save some work,  the timing cover shape(and a few other views) would do the same  *????*
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

Offline Tomcat

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Re: What kind of numbers are these!??
« Reply #7 on: 21.07. 2017 11:44 »
Coater87 said swing arm engine.
Should be CA7, CA10 or later for a swing arm engine. Sorry to be the bearer of bad news but I agree with JulianS, cases have been polished and IMHO the stamps don't look factory. It doesn't matter if you have a receipt for it and the registration department in your country don't have these numbers on their computer, they don't know what the numbers should look like.  But, don't go near a concourse competition.  *eek*
'48 A7 '59 SR '74 850 Commando TDM900

Offline coater87

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Re: What kind of numbers are these!??
« Reply #8 on: 21.07. 2017 12:43 »
 I do not own this, it's for sale.

 I asked the guy to send me pictures of the motor numbers. This is what I got from him.

 I explained the numbers were bad, it's not a rocket gold star super ultra rocket motor. Then I explained it may not even be an A10 motor, but an A7.

 I think I *****  him off,  which is too bad because the crankshaft may be a good one. But who knows without tearing into it. *dunno*

Lee
Central Wisconsin in the U.S.

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Re: What kind of numbers are these!??
« Reply #9 on: 21.07. 2017 13:29 »

 
Quote
.....  which is too bad because the crankshaft may be a good one. ...

 Maybe best pretend it's not a good'un for peace of mind *dunno*...... or go hard and live dangerous *work* *fight* *beer* 
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

Offline coater87

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Re: What kind of numbers are these!??
« Reply #10 on: 21.07. 2017 13:45 »

 
Quote
.....  which is too bad because the crankshaft may be a good one. ...

 Maybe best pretend it's not a good'un for peace of mind *dunno*...... or go hard and live dangerous *work* *fight* *beer*

 He is up near 800.00 U.S. for this really rare, one off, Super Ultra Rocket Gold Star motor.

 Taking a chance is one thing, wiping my butt with a wad of money is another. *eek* *smile*

 Someone WILL buy this though, next month it will be on EBAY for 1500.00....

 Lee

 
Central Wisconsin in the U.S.

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Re: What kind of numbers are these!??
« Reply #11 on: 21.07. 2017 14:15 »
I hope the eventual purchaser will be wearing oven gloves 'cos it looks red hot to me.
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Online chaterlea25

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Re: What kind of numbers are these!??
« Reply #12 on: 21.07. 2017 20:03 »
Hi All,
Lee,
On any BSA crankcases A and B series I have looked at there is a date stamp,(in UK format) usually inside the timing case or outside on the case more or less under the magneto
Definitely a re stamped number
Are there any more pics on the ad?
Go on give us a laugh *smile* at $800 he will be looking at it forever ??

John

1961 Super Rocket
1963 RGS (ongoing)