cooperess - I have accidentally deleted the wording in this post of yours during a copy and paste attempt. My apologies. Please post again if you can.

My thanks to all of you who replied, Question is answered
I have the boot mentioned . I can now complete
Thanks again

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Mk1 Cooper S
Mini K Rally car

Bill B you mentioned that your gear stick is out of your car. If its possible, could you please measure the distance between the two parallel sides of the hole that the gear stick goes through. To me this is an important measure as it limits the sideways movement of the gearstick and prevents the ball coming out of the bush
Many thanks

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Mk1 Cooper S
Mini K Rally car

None of the Mini parts books or parts microfiche show the later flat plate (in place of the cupped one) or the inner boot, so the actual part number is still a mystery.

In an earlier post in this thread John Smidt said to use the pot joint boot - GSV1073. Here's an extract from his catalogue showing the dust excluder boot (no. 1) and quoting GSV1073.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

What boot is it? An original or replacement? Just asking for the benefit of others who may have the same issue.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

No worries who ever you are.

Just to be clear.

The Mk1 has the cup shaped top plate and no inner boot.

The Mk2 has a flat top plate and you can fit an inner boot GSV1073

Wasn't there a reinforcing steel plate inside the cup on MK 1S, and Deluxe?
Mine is missing but doesn't seem to matter.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

The boot I am using is GSV1073. It came from Mini King in July 2012. It fits the steel cup type mount but in my opinion it sits too high on the lever and interferes with the body gaiter. By using a plate type it will lower the seal and give a bit more clearance to the gaiter. There is a recess inside the dust seal of 4mm where the plate sits. this allows the seal to sit about 8mm lower and therefore reduce the impact on the gaiter.
The description for the seal is "pot joint boot kit , mini and moke 1975 on"
That raises the question : is this plate identified in any of the later parts book? If so does it have a part number
In my earlier post I mentioned that I had a gut feeling that the hole in this plate was not round and that it acted as a gate. I now believe that sides of the hole were parallel to prevent the lever moving too far to the right or left and allowing the lever ball to release from the nylon bush.

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Mk1 Cooper S
Mini K Rally car

Doc, I am sure you are right there was a plate with parallel sides designed limit the lever travel left to right to stop the ball falling out of the bush. Having said that I am relying on my memory of the late 60,s
By the way there is a re engineered bush which is slightly longer that prevents this happening but I still like the idea of a more permanent fix which the plate provided. You can see the cut out in the plate in one of the pics above.

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Mk1 Cooper S
Mini K Rally car

The plate on my gear lever assembly measures:
Overall diameter of plate = 2.950" (2 15/16inches)
Plate Thickness = 0.125 (1/8inch)
Inner hole:
Parallel sides = 0.940 (15/16inches)
Diameter of round ends = 1.305" (1 9/32inches)

OK, herewith some further information from John Smidt and with reference to his BMC engineering drawings. This is a bit lengthy but I thought worth putting all the information in place rather than having several posts. Having said that comments and questions, as always, are welcome.

The BMC, Leyland and Mini King parts book images show the "cup" (BMC name Retainer - Change Speed Lever, part 22G290) facing down. This is the way it was fitted originally in the UK and possibly early Australian assembled vehicles. The same design is also used on the Morris 1100.

At some stage the Retainer was reversed and a dust exclusion boot (BMC name Gaiter - Inner, Part AYG3084) fitted around the top. Presumably this was done to exclude dust after extensive experience with the remote change mechanism on dusty Australian roads.

Coinciding with the introduction of the Mark 2 Series Mini in 1969 (John believes but is happy to be challenged) a "plate" replaced the cup with the exclusion boot being retained. Contrary to my earlier comment in this thread the boot does appear in Mini parts books but only as a text addition without an adjoining image, hence its presence is not obvious at first glance.

The plate (BMC name Stop, Change Speed Lever, Part AYG3065) is part of the Change Speed Lever Assembly - BMC part AYG3086. The assembly comprises the change speed lever (the top bit - part AYG3087), the stub (the bottom bit with a ball - part AYG3088), the bush (rubber and steel tube that joins the two - part AYG3083) and the Stop. The engineering drawing for the assembly says "Stop to be loosely fitted to stub before assembly into bush".

The drawings in the parts book and in John's catalogue (see previous post) only show the earlier version with the cup (facing down) and not the later Mark 2 version with the Stop as part of the assembly. No parts book shows the Stop because it can't be purchased separately as it is part of a factory manufactured assembly.

The Gaiter - Inner has not been available for some time so the pot joint boot part GSV1073 is routinely supplied as a workable replacement.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

I think the plate you refer to is called Stop, Change Speed Lever - part AYG3105. John has some NOS and used of these.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Ooops, I'm having a bad day. Didn't tell you it was me - winabbey. Sometimes the moderator privilege that enables modifying and deleting posts can bite back.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

I take it the gaiter in question shows in my PUB 1056M on Page FC-10 55* Gaiter Inner Part Number N.L.A.