BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: john sever on 24 Mar, 2021, 05:42

Title: A65 Stop plate (gear change)
Post by: john sever on 24 Mar, 2021, 05:42
Hi   Just joined, and hoping for some advice. I need a Stop plate (gear change spring) for a 1965 A65 (part nr 68-3118). Cant seem to find one anywhere and was wondering if the later model stop plate (57-4028) could be used or could be modified. The adjacent return spring with which they engage looks identical for early and later models.
Thanks
John 
Title: Re: A65 Stop plate (gear change)
Post by: Bess on 24 Mar, 2021, 14:52
Hi John,

             Welcome to the forum.

I think you mean part number 68-3083? You cant use the later plate, I guess you could modify depending on skill and machines you have available the keyway looks the most difficult to form.

Best wishes...
Title: Re: A65 Stop plate (gear change)
Post by: john sever on 26 Mar, 2021, 05:24
Thanks for the reply and the photos; they are very helpful.  Looking at them, I think I'd better search around for an original, as you say, the mod wouldnt be that easy.
John
Title: Re: A65 Stop plate (gear change)
Post by: Mike Farmer on 26 Mar, 2021, 11:29
 :) :) :)

I bought the earlier one,(on the right in pic) a few months ago and I think it was either Drags or Kidderminster. BUT I had to drill and tap it myself and put grub screws in to hold it in place. I actually put two in at about 120 degrees apart and drilled through VERY slightly into the shaft to ensure rotation was not possible. I had replaced the shaft so there was no keyway on it.

Mike 8) 8) 8)
Title: Re: A65 Stop plate (gear change)
Post by: DAVE BRADY on 26 Mar, 2021, 11:53
Hi John,

I think that I may have one that I do not need as my bikes have the later plate.  I will have a look later and let you know.  Where about are you?

Dave.
Title: Re: A65 Stop plate (gear change)
Post by: DAVE BRADY on 26 Mar, 2021, 13:46
Hi,

I have found one.  It is identical but without the part number cast on and there is no grub screw.

Dave.
Title: Re: A65 Stop plate (gear change)
Post by: Mike Farmer on 26 Mar, 2021, 14:41
 :) :) :)

I think the grub screws are 2ba (I had to buy 10 but I haven't gotta clue where the other 8 are)

Mike 8) 8) 8)
Title: Re: A65 Stop plate (gear change)
Post by: DAVE BRADY on 26 Mar, 2021, 17:03
Hi,

The one I have does not even have a hole for the grub screw so perhaps a very early one.

Dave.
Title: Re: A65 Stop plate (gear change)
Post by: Mike Farmer on 28 Mar, 2021, 10:09
 :) :) :)

Mine didn't either so you need to be a bit careful with the line up

Mike 8) 8) 8)
Title: Re: A65 Stop plate (gear change)
Post by: DAVE BRADY on 28 Mar, 2021, 10:12
Hi,

The key should give the right position so the grub screw was probably just to keep it that bit more secure on the shaft.

Dave.