Author Topic: Great Mechanical Disasters  (Read 1387 times)

Offline Swarfcut

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Great Mechanical Disasters
« on: 22.08. 2020 09:20 »
 Reading posts of what folks find after a new purchase or a roadside failure makes me realise there must be a huge amount of stuff of interest being pictured and worth sharing.

 Any thoughts on something along the lines of "just a picture"......... featuring the blow ups, failures and previous owner bodges?

 Swarfy

Online Greybeard

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Re: Great Mechanical Disasters
« Reply #1 on: 22.08. 2020 09:51 »
Limited to A7 & A10's?

Online muskrat

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Re: Great Mechanical Disasters
« Reply #2 on: 22.08. 2020 10:05 »
Guilty.
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
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Offline Swarfcut

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Re: Great Mechanical Disasters
« Reply #3 on: 22.08. 2020 10:20 »
GB  A7 and 10 as an obvious watch and learn, let's see what other folks reckon.

 Musky. Innocent until proven..... Exhibit A  Yup... A class act.

 Cheers.

    Here's one I made earlier.

 MI Motorway, Newport Pagnell 1971 Outside lane, running fine.  Felt a little hesitation......

 Swarfy.



Online Greybeard

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Re: Great Mechanical Disasters
« Reply #4 on: 22.08. 2020 10:38 »
That picture of a claggy sludge trap should be mandatory viewing for people who want to put modern oil in one of these engines without a proper clean!

Offline Swarfcut

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Re: Great Mechanical Disasters
« Reply #5 on: 22.08. 2020 11:01 »
     Well said GB.  Used  heat around the plug hole as an aid to getting the plug out with minimal violence. All was revealed!!! Back in the day the sludge trap got just a brief two line mention in the service sheet. Folks reckoned they were sealed for life and left well alone, and the crank grinders kept quiet and knew you would soon be back again.

 Amazing that up to then it had run just fine. So, don't chance it, clear it out.

    Crank survived, rod, barrel were scrap. Piston skirt broken, valves bent. Cylinder head reused with new valves and guides. New oil pumps were still in production and second hand engines regarded as junk, bought one from Bob Joyner's on the Wolverhampton Road in Oldbury. Crank reground at Gordon Smith's in Halesowen, and a quick mix'n match put it back on the road.

  Sadly these businesses are all gone.....

 Swarfy.

Online KiwiGF

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Re: Great Mechanical Disasters
« Reply #6 on: 22.08. 2020 12:17 »
GB  A7 and 10 as an obvious watch and learn, let's see what other folks reckon.

 Musky. Innocent until proven..... Exhibit A  Yup... A class act.

 Cheers.

    Here's one I made earlier.

 MI Motorway, Newport Pagnell 1971 Outside lane, running fine.  Felt a little hesitation......

 Swarfy.

I have two spare pairs of crankcases, and one crank, that I will only part with when I cannot ride the A10 anymore 🙄

I also have a badly welded up timing side case that matches the drive side on the bike but will always be just an ornament  *shh*

But I am banking on someone one day selling new barrels  *pull hair out*
New Zealand

1956 A10 Golden Flash (1st finished project)
1949 B31 rigid “400cc” (2nd finished project)
1968 B44 Victor Special (3rd project,in progress)
2001 GL1800 Goldwing, well, the wife likes it
2007 KTM 950 Adventure, cos it’s 100% nuts

Online Black Sheep

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Re: Great Mechanical Disasters
« Reply #7 on: 25.08. 2020 10:11 »
Some evidence of a few minor incidents over the years. Norton crankcase sliced clean in half. The engine was still running on one.
Snapped A10 crank. The odd broken con rod or two. Or three . As for pistons...
2 twins, 2 singles, lots of sheep

Online mikeb

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Re: Great Mechanical Disasters
« Reply #8 on: 25.08. 2020 10:21 »
what was left of the timing side bush. i'm sure i'm not the only one
New Zealand
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Online JulianS

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Re: Great Mechanical Disasters
« Reply #9 on: 25.08. 2020 11:02 »
Autojumble "spare" magneto.

Online RichardL

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Re: Great Mechanical Disasters
« Reply #10 on: 25.08. 2020 13:48 »
Swarfy,

Great topic! Not looking forward to sharing any future events, but not so optimistic as to think there will be none.

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline morris

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Re: Great Mechanical Disasters
« Reply #11 on: 25.08. 2020 22:19 »
Dismantled an SA gearbox I bought a while ago in good faith on a bike jumble.
Seems to have been run with grease in it. *problem* Found traces of grease all over the place...
These boxes have a reputation for being sturdy so I don’t dare imagine how this one has been treated.
All gears are absolutely knackered, one of the cam levers has been broken and (badly) welded, the gear change lever shaft is twisted... would need a pretty heavy person to stand on the lever for it to twist like that...  *bash* *work* All that because some ham fisted knob taught that filling the box with grease was a good idea to get rid of the oil leaks... *doh*
Main shaft, lay shaft and cam seem to be reusable and the housing and covers aren’t too bad either.
At least I have a box of spare parts now...
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'52 BSA A 10 Plunger
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Offline a10gf

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Re: Great Mechanical Disasters
« Reply #12 on: 25.08. 2020 22:44 »
Excuse me for saying... great topic!

A10 GF '53 My A10 website
"Success only gets you a ticket to a much more difficult task"

Online Greybeard

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Re: Great Mechanical Disasters
« Reply #13 on: 25.08. 2020 22:52 »
Did I write up how I drove from Scotch Corner to London with one piston removed from the engine of my Ford Consul?

Seems I did:
https://www.a7a10.net/forum/index.php?topic=8199.0

Online Minto

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Re: Great Mechanical Disasters
« Reply #14 on: 02.09. 2020 09:15 »
Did I write up how I drove from Scotch Corner to London with one piston removed from the engine of my Ford Consul?

Seems I did:
https://www.a7a10.net/forum/index.php?topic=8199.0

Yes, but a great story worth re reading
52 A10 plunger
Aprilia RSVR