Author Topic: Motor strip  (Read 5520 times)

Online chaterlea25

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Re: Motor strip
« Reply #45 on: 05.03. 2018 17:41 »
Hi Mark,
The bolts are "specials" and should be replaced with known good quality ones (SRM ?)
Yes they should have a whit head (from memory) maybe someone used a later A65 or Triumph bolt???

John
1961 Super Rocket
1963 RGS (ongoing)

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Re: Motor strip
« Reply #46 on: 07.03. 2018 09:30 »
Hi John

Mystery solved. Yes, they are Whitworth bolts, but the socket I tried although marked 1/4W wasn't!

when I first got the bike I didn't have any WW sockets so bought a strip from Fleabay, but then also bought a next whole set of sockets that WW in them.
so I've never used them, and the only reason now was to save me having to take all the set into work.

So I think the Fleabay strip can go in the bin. Who knows what size they actually were?

Online duTch

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Re: Motor strip
« Reply #47 on: 07.03. 2018 10:18 »

 
Quote
So I think the Fleabay strip can go in the bin. Who knows what size they actually were?

 don't bin 'em, they'll be good for something- can't be too hard to work it out...the flywheel bolts are BSC thread (5/16 or 3/8- can't remember)
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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Re: Motor strip
« Reply #48 on: 07.03. 2018 12:46 »
It turns out the cheap ebay ones are metric just stamped up WW sizes  *eek*  the 1/4WW was a 13mm socket! no wonder it didn't fit.

Anyway, sludge trap out now, and all cleaned up. *good3*

Online Greybeard

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Re: Motor strip
« Reply #49 on: 07.03. 2018 16:45 »
It turns out the cheap ebay ones are metric just stamped up WW sizes  *eek*  the 1/4WW was a 13mm socket! no wonder it didn't fit.
Jeez, did they come out of a cracker!?

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Re: Motor strip
« Reply #50 on: 21.03. 2018 11:40 »
After much searching, I have found a place who will do the cam and idle bushes for me. And as is often the way they are right on my work doorstep
a 15min drive. and best of all they are a Vincent specialist  *smile* so with a little luck it won't be too long before I can start putting it back together.

And on that note, I bought some 50mm repair washers, these I'm hoping I can machine a spacer to replace the shims and the worn away boss on the primary side of the crank. The plan is that this will take up the end float and remove the risk of really thin shims breaking up? hopefully  ;)

Online RichardL

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Re: Motor strip
« Reply #51 on: 21.03. 2018 11:54 »
I'll be interested to hear Chaterlea John's thoughts on those washers. I was of the belief that those who made their own thick shims did so by surface grinding high-carbon steel. Please let me know if I'm misjudging the material.

Richard L.

Plan on signing up for the world-wide 2017 DISTINGUISHED GENTLEMAN'S RIDE on September 30, 2018. Watch website at https://www.gentlemansride.com for details.

Offline Topdad

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Re: Motor strip
« Reply #52 on: 21.03. 2018 14:14 »
 I had a similar thought . I'd seen something similar to those  in a builders merchants on Sunday but then thought no wouldn't be them to soft .
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Re: Motor strip
« Reply #53 on: 21.03. 2018 15:05 »
Curious *????* as it shouldn't move or be a load bearing piece I wouldn't have thought it mattered.
doesn't it just space the bearing off the crank web?

Online Greybeard

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Re: Motor strip
« Reply #54 on: 21.03. 2018 15:44 »
Curious *????* as it shouldn't move or be a load bearing piece I wouldn't have thought it mattered.
doesn't it just space the bearing off the crank web?
I'd worry about mild steel getting squashed by lateral forces. There's the action of the engine shock absorber; also the end thrust from the worm drive gears on the oil pump. Might be ok but I'd worry about it.

Online ellis

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Re: Motor strip
« Reply #55 on: 21.03. 2018 18:25 »
Not a good idea to use mild steel washers. You should use carbon steel for shims.      :(

ELLIS

Online chaterlea25

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Re: Motor strip
« Reply #56 on: 21.03. 2018 22:35 »
Hi All
Quote
I'll be interested to hear Chaterlea John's thoughts on those washers.

Quote
Not a good idea to use mild steel washers. You should use carbon steel for shims.      :(

I agree with ellis

Sometimes making up a spacer or shim with softer materials can help with trial fits and clearance checking
Then once satisfied get the hardened part ground to the size required
Saves making a nuisance of yourself when you have to go to an engineering shop to get a part ground again and again

John

1961 Super Rocket
1963 RGS (ongoing)

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Re: Motor strip
« Reply #57 on: 22.03. 2018 09:45 »
cheers guys all advise is greatly received  *good3*

Online RichardL

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Re: Motor strip
« Reply #58 on: 22.03. 2018 11:51 »
Regarding test fitting, you'd still have to have these ground multiple times in fitting. Not that I've done the thick shim approach, but test fitting with original-type shims seems better.

Another problem, I think, is getting these to correct ID and OD without them crumpling. If you try to go oversize for the OD because the boss is gone, I think you may create a situation where you can't get a puller behind the main bearing. Maybe BSA included the boss for this very reason.

Richard L.
Plan on signing up for the world-wide 2017 DISTINGUISHED GENTLEMAN'S RIDE on September 30, 2018. Watch website at https://www.gentlemansride.com for details.

Online chaterlea25

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Re: Motor strip
« Reply #59 on: 22.03. 2018 21:20 »
Hi Richard,
Quote
Regarding test fitting, you'd still have to have these ground multiple times in fitting

What was in my head and did not appear typed on here was,
Mild steel spacers could be turned up on a lathe or even filed carefully to thickness
(Why do I assume everyone with an old bike has a lathe and other machine tools  *????* *????* *????*)

 *conf2*
John




1961 Super Rocket
1963 RGS (ongoing)