4 small black malossi orings

Good day,

I'm in the process of installing a malossi 4v head and cylinder onto my 125cc quasar motor and cannot conclude where the black orings are to be installed. Does anyone have experience installing the malossi kits?
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Voorheen [evolution]
My cylinder only has recessed areas in 2 spots - not the 4 as shown; perhaps I am to use 2 of them?
perhaps , it can be that you use the other 2 on the bottom of the cilinder .. but that is a wild gues i am not experienced @ 4stroke cilinders
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