The S seal is 1/8" bigger on OD and ID. So is the bronze bush, and it's 5 times dearer than a Mini one.
So you have to bore the cover for both. And then fit & bore the bush, as they are supplied ~.007" undersize.
The side covers to bore out are the ones with a machined ring on the outer corner, where a shroud was fitted. I think Mini K and early Clubby had these, as well as the Mokes. They have no part number on them...
These covers have more meat around the bush than the early ones.
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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.
