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XR70 rebuild, what are these?

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Hi, bought a top end kit for the 2003 XR70. Making my 12 and 14 yr old help as a learning experience. We've watched some videos, have it torn apart and ready to re-assemble. The eBay listing said the head was assembled and that would be some extra gaskets included and I have figured them all out but the ones in the picture? What are these 2 brown seals for (valaves?) And if the head is already assembled do I need them? What are these 2 smaller o-rings? The don't appear to go between the cylinder/head etc as I have those thicket o-rings. Thanks for any help.20170623_175058.thumb.jpg.3157e1313333415b819a3430f9f6f7b1.jpg

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The two brown things on the right are valve guise seals, shown as part #1 on THIS microfiche diagram. You would need a valve spring compressor tool to disassemble the spring assembly and replace them. You be able to see if there are guide seals already in place on the head, lift off the tappet cover on the very top of the head and look at the springs.

I can't say what the other two o-rings are for specifically

Edited by dirtbkr188

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