Author Topic: A10 cam gear  (Read 308 times)

Offline BritTwit

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A10 cam gear
« on: 23.01. 2018 00:03 »
I need some advise on a parts book mystery.  I removed the cam gear from my '60 A10 Spitfire and my '53 Super Flash.  The gears were stamped 67-338.  I also had another 5 67-338 on the shelf.  The 49-53 as well as the 1960 parts book shows 67-337.  My 1970 A65 parts book shows 67-338.  My price sheets from 1950 to 1965 show no supersession or consolidation of the two.  In checking on the web with a supplier, both photos appear indentical, down to the timing mark location.
I have no A65 parts in my shop, only A10.  Where did all of these 67-338 come from?

Offline KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
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Re: A10 cam gear
« Reply #1 on: 23.01. 2018 01:25 »
I need some advise on a parts book mystery.  I removed the cam gear from my '60 A10 Spitfire and my '53 Super Flash.  The gears were stamped 67-338.  I also had another 5 67-338 on the shelf.  The 49-53 as well as the 1960 parts book shows 67-337.  My 1970 A65 parts book shows 67-338.  My price sheets from 1950 to 1965 show no supersession or consolidation of the two.  In checking on the web with a supplier, both photos appear indentical, down to the timing mark location.
I have no A65 parts in my shop, only A10.  Where did all of these 67-338 come from?

Could it be a casting number on the gear and not the part number? Typically the casting number is one or two digits different to the part number. I don’t recall seeing casting numbers on gears, just on things like foot rests or timing cases, but maybe they are on some gears.

There is also some variation on whether or not parts have casting numbers or not, depending, I think, on the company that bsa asked to make a particular batch.
New Zealand

1956 A10 Golden Flash EA7-168x, CA10 913x, left BSA together for Liverpool, 5th Dec 1955.

1949 B31 rigid “400cc hot rod” (favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, missing parts so mission impossible?

1952 Armstrong Siddeley Whitley for rainy days (with wife).

GL1800 Goldwing not sure why, maybe cos it always starts

Offline BritTwit

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Re: A10 cam gear
« Reply #2 on: 23.01. 2018 03:48 »
Thanks for the input kiwgf. 

True, the casting number is one digit off from the part number, but these numbers are stamped on the face of the gear.  Normally I would assume the 67-0337 was consolidated with the 67-0338.  However, the price list shows separate numbers all the way up to 1967.