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To help some of the people working on bike restoration I am attaching information provide in several BSA service bulletins. Your wheel less tire is usually listed in the parts manual. Once you have it check for that number on BSA SB #79 May 1961. The rim offsets are listed. The spoke length and descriptions are listed on the BSA SB #714 revised Oct. 1957 The bike models that are hand listed were not verified completely. The ones I have used worked out for me. Good luck, Lloyd L
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A7 & A10 Engine / Re: Timing cover mods for tacho drive.
« Last post by berger on Today at 00:15 »
did one last year, got a welder geezer to build one up as near to the original one is, dressed it up to same pattern as original then gave both covers to brother who did the holes same as original one , its on the bike now and the original is for another ss engine, original ones are too much money--- get one built up and engineering shop will bang the holes in at the correct angles, think welder man charged £20 E D ITTT sorry you mean 2to 1 drive , I went to the pub--- not with it yet--- yes its been covered somewhere I THINK
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A7 & A10 Engine / Re: Timing cover mods for tacho drive.
« Last post by trevinoz on 23.02. 2019 23:24 »
There's a fair bit involved to convert the cover.
The easy bit is the holes but it has to have a flat machined around the hole.
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A7 & A10 Engine / Re: I'm smoking on the right too!
« Last post by Steverat on 23.02. 2019 22:31 »
steve leave the sump plate loose with a good oil catching thingy under it so the oil just runs out put some splash guards round it too ;), if it still smokes you know what's next, if it doesn't something else is going on but I am pretty sure mine drains about 200 ml after stopping the engine even after seeing the bubbles in the return .edit swarfy my sucky tube end just enters the gauze and the tapered bit sits in the gauze hole so maybe 3mm below the gauze if that

Swarfy's post sent me right back out to the workshop...yesss my sucky tube end is bent! Shall gently try to straighten it tomorrow morning, then I'll do Keith's diagnostic and  report back.
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A7 & A10 Engine / Timing cover mods for tacho drive.
« Last post by PDMiller on 23.02. 2019 22:30 »
Apologies if this has been covered but I'm wondering if a standard timing cover can be machined to take a tacho drive gearbox. I see that some covers are re-enforced on the inside where the hole would be machined out and the screw holes would be tapped but mine isn't.
 I suspect that my latest hunt is to be for a proper timing cover but just wondered if anyone had converted a standard one.

Thanks
Pete
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thanks Musky,
will have a rough idea of position I suppose it could be scaled to get sizes.
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A7 & A10 Engine / Re: I'm smoking on the right too!
« Last post by berger on 23.02. 2019 21:58 »
steve leave the sump plate loose with a good oil catching thingy under it so the oil just runs out put some splash guards round it too ;), if it still smokes you know what's next, if it doesn't something else is going on but I am pretty sure mine drains about 200 ml after stopping the engine even after seeing the bubbles in the return .edit swarfy my sucky tube end just enters the gauze and the tapered bit sits in the gauze hole so maybe 3mm below the gauze if that
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Wanted & For Sale / Re: wanted - one pillion footrest
« Last post by berger on 23.02. 2019 21:48 »
I will look at your photo again and look in my cave I might have one *dunno2* if I see one I will pm you before 7pm
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A7 & A10 Engine / Re: I'm smoking on the right too!
« Last post by Swarfcut on 23.02. 2019 21:26 »
Steve...With that much oil in the sump, there should be no air in the oil being scavenged. It should be a continuous flow.
 The sump ball valve should be well within the raised gauze of the sump plate, and protrude perhaps 12-15mm below the face of the sump plate mounting, almost to the bottom of the sump plate so that it is well below the oil level.....engines stored without the plate suffer bent up scavenge pipes.

 Air in the return all the time means a leak or split in the scavenge pick up pipe.

 Swarfy.
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A7 & A10 Engine / Re: New cam followers
« Last post by Greybeard on 23.02. 2019 21:21 »
It's all a bit foggy in my memory at the moment. I will have to study everything when I get back to it.
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