Get a second hand set from Motoworks..
I would like to understand first what could have happened to existing rocker cover? Can they warp? Doesn’t look to me like it’s worn at the filler seat.
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Get a second hand set from Motoworks..

And that the BMW long term recommendation was replacement of rocker cover/plug seat/oil plug as one. (At some vast price, I might add!).
Dr F that's just the seat and plug: what BMW were saying was that the ROCKER COVER needed replacing at the same time which is what baffled me.
I thought that's what had been done but it still leaked?I think i would be fitting the whole plastic assembley when you get it back home and seeing where it goes from there
Never mind replacing the rocker cover until you check what the new bits will do
The size of the lower O-ring is 18x4 mm.Nothing replaced since new o rings in Nairobi...
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