Author Topic: Crank identification  (Read 389 times)

Offline 865

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Crank identification
« on: 27.02. 2021 09:43 »
Can anyone identify this crank have a bloke trying to sell it to me as an A10 crank doesn't look like anything I've ever seen
WA

Offline Swarfcut

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Re: Crank identification
« Reply #1 on: 27.02. 2021 09:52 »
   Me neither. Deffo NOT BSA A10.

 Swarfy.

Offline JulianS

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Re: Crank identification
« Reply #2 on: 27.02. 2021 10:17 »
Possibly 2 ends of an alternator Norton crank welded to a new central flywheel.

A different view may show the bolt holes where the Norton was attached to the original flywheel.

Online bsa-bill

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Re: Crank identification
« Reply #3 on: 27.02. 2021 10:19 »
OH no not A10, A10 throw pistons up and down together - that's the obvious point.

having said that does anyone recall someone modifying an A so that it was pistons 180 degrees apart, it just a passing thought in the bit of my brain that used to do memory that I have read something along those lines, tho it would involve much more than just modifying the crank
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline 865

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Re: Crank identification
« Reply #4 on: 27.02. 2021 12:18 »
I knew it wasn't a10 but mystified to what it is
Wonder if the Gumtree guy is trying to scam me
Lol
Might be a Nigerian prince
WA

Online bsa-bill

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Re: Crank identification
« Reply #5 on: 27.02. 2021 13:32 »

 Well looks like it's just not all cobwebs up there, found this, it's a pdf but load straight into my browser

[urlhttp://www.britcycle.com/manuals/Building%20offset%20crankshafts%20for%20British%20Twins.pdf][/url]

so be aware 865 looks like someone is trying to sell you a modified Norton Crank, with a picture of one identical to the one in the article -- mmmmmm



All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline 865

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Re: Crank identification
« Reply #6 on: 27.02. 2021 13:39 »
I got a message from another clown with a pic I saw on an English auction site

I think I'll post on the wanted section here will def be safer
WA

Offline RDfella

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Re: Crank identification
« Reply #7 on: 27.02. 2021 17:11 »
Wonder how they arranged the oil feed? If it's anything like the welding, not sure I want to kmow ....
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Offline trevinoz

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Re: Crank identification
« Reply #8 on: 27.02. 2021 20:50 »
Don't tell me that you need a crankshaft as well.

Online ironhead

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Re: Crank identification
« Reply #9 on: 27.02. 2021 21:51 »
Thats a modified Norton crank set to 90 degrees. sometimes used in A 65's. (could possibly work in an A10 as well ) At 89mm stroke, can make an interesting engine with less vibration.
SA

Online RichardL

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Re: Crank identification
« Reply #10 on: 27.02. 2021 23:33 »

 Well looks like it's just not all cobwebs up there, found this, it's a pdf but load straight into my browser

[urlhttp://www.britcycle.com/manuals/Building%20offset%20crankshafts%20for%20British%20Twins.pdf][/url]

so be aware 865 looks like someone is trying to sell you a modified Norton Crank, with a picture of one identical to the one in the article -- mmmmmm
Geoff mentions an earlier article. I think this must be it:
http://www.britcycle.com/Manuals/Geoff%20Collins%201970%20Triumph.pdf

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.


Online muskrat

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Re: Crank identification
« Reply #11 on: 28.02. 2021 07:51 »
G'day Fellas.
I agree, looks like a Notrun crank.
If your going to the trouble of offsetting a twin crank 72 degrees is the magic number, then there's the cam as well.
Cheers
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Offline trevinoz

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Re: Crank identification
« Reply #12 on: 28.02. 2021 21:26 »
If you are looking for a crank, Pete, I may be able to find one.

Offline 865

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Re: Crank identification
« Reply #13 on: 02.03. 2021 08:45 »
Thanks Trev
Mike stuck his hand up with one for me so will grab that one
Thanks anyway i appreciate it
WA