Author Topic: Markings below serial numbers  (Read 2241 times)

Offline Lightningpower

  • A's Best Friend
  • ***
  • Join Date: Jun 2010
  • Posts: 69
  • Karma: 0
Markings below serial numbers
« on: 30.06. 2010 06:25 »
Some of the A7 and A10 motors I've seen have different markings beneath the serial number.  Is there a definitive list anywhere that tells us what they mean?
HHC= high compression?
HC=? (less high compression that the other one???)

I saw an A7 motor with a lousy stamping under the serial number that clearly ends in STER'S  but the first bit isn't even stamped into the case.  What is this?  Are there other markings?

Thanks, Christian
1953 Star Twin - Racing
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet

Offline mark

  • Melbourne, Australia
  • A's Best Friend
  • ***
  • Join Date: Jul 2009
  • Posts: 119
  • Karma: 2
Re: Markings below serial numbers
« Reply #1 on: 30.06. 2010 08:31 »
my understanding is that HHC refers to High Lift Cam (H) and High Compression Pistons (HC) and this was on the earlier rockets until the flashes went to the 356 cam in 195? when the stamping reverted to HC only. My 55 and 57 engines both have HHC. I'll stand corrected however.
Regards
Mark
55 road rocket




71 Norton Commando Roadster 750


Australia

Offline 1660bob

  • A's Best Friend
  • ***
  • Join Date: Sep 2009
  • Posts: 110
  • Karma: 1
Re: Markings below serial numbers
« Reply #2 on: 01.07. 2010 21:15 »
I read it as Mark above, i.e H: 356/357 high lift cam HC: high compression. Both together:HHC.
However my 1961 S/Rocket is stamped HHC so i think it applies after the Road Rockets. What are (genuine) Rocket Gold Stars stamped? surely HHC....C`mon RGS owners let us know, Bob.

Offline trevinoz

  • Newcastle, N.S.W. Australia.
  • Wise & Enlightened
  • *
  • Join Date: Jul 2006
  • Posts: 2903
  • Karma: 67
Re: Markings below serial numbers
« Reply #3 on: 02.07. 2010 04:21 »
Rocket Goldies used the standard Super Rocket engine thus have HHC stamped.
Trev.

Online lawnmowerman

  • Resident Legend
  • *****
  • Join Date: Dec 2009
  • Posts: 614
  • Karma: 8
  • 1959 Super Rocket. Kent, England
Re: Markings below serial numbers
« Reply #4 on: 02.07. 2010 10:09 »
My 59 SR has HC so unless I have the wrong engine it looks like HHC was dropped some time before 59 when the 356 cam was fitted as standard - or could it have been built on a Friday afternoon when the factory had run out of the correct crank cases.  *lol*
If HHC was dropped then I would assume that later RGS models would also be HC if they were based on the SR engine.

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)

Offline Lightningpower

  • A's Best Friend
  • ***
  • Join Date: Jun 2010
  • Posts: 69
  • Karma: 0
Re: Markings below serial numbers
« Reply #5 on: 02.07. 2010 14:24 »
My 1959 Spitfire Scrambler has HHC stamped on it.  BSA was good about building your machine to your specs. What cam did yours come with?
1953 Star Twin - Racing
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet

Online lawnmowerman

  • Resident Legend
  • *****
  • Join Date: Dec 2009
  • Posts: 614
  • Karma: 8
  • 1959 Super Rocket. Kent, England
Re: Markings below serial numbers
« Reply #6 on: 02.07. 2010 15:14 »
Not sure Lightning, engine was rebuilt by PO so not sure what he camshaft he put in. I think that the engine may be a year or two newer than the frame but I have read on other posts that it was quite normal for a dealer to change out the complete engine for warranty claims back in the day. Probably cheaper than rebuilding.

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)

Offline Lightningpower

  • A's Best Friend
  • ***
  • Join Date: Jun 2010
  • Posts: 69
  • Karma: 0
Re: Markings below serial numbers
« Reply #7 on: 24.07. 2010 18:08 »
Can anyone tell me what the stamping below the serial number on a late A7 mean?  As mentioned above, the stamping is illegible for the first letters but ends in "STERS".  Thanks.
1953 Star Twin - Racing
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet

Online muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8270
  • Karma: 106
  • Lake Conjola NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: Markings below serial numbers
« Reply #8 on: 24.07. 2010 19:34 »
Got me stumped, maybe the first 3 letters are BLI, cause BSA stands for Bl@@dy Sore Ass. LOL. It might have been stamped by a PO with his nickname..
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline terryk

  • Valued Contributor
  • ****
  • Join Date: Oct 2006
  • Posts: 458
  • Karma: 3
  • Townsville Queensland Australia
Re: Markings below serial numbers
« Reply #9 on: 25.07. 2010 14:18 »
It might be a previous owners name. I had BLUE stamped near my engine number on a previously owned A10 years ago and its only that I knew the previous owners nick name was Blue that I knew what it meant. The person that now owns it thought that it had been balanced and blue printed until I spoiled his fun and told him what it meant. Kill joy I am.
1950-53 A10 rigid/plungers, 1958-61 A10 super rockets, 1947-50 A7 longstrokes, 1949 Star twin,
1951-54 A7 plungers, 1940s M21, WDM20s,
1948-50s B33s rigid/plunger/swingarm, 1948-50s b31s rigid/plunger/swingarm