70cc kit, black or silver ring on top or 2nd?

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KneEkolAaS

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One is stamped D and the other DY
One has a silver coated edge
The other just black
One is wider in the flat way meaning one has a smaller inner circumference?
I am guessing the flater one on top so oil gets past the middle one but is stopped by the deeper one up top?

This is the 70cc piston and barrel going on with the e-22 oversize valve head to hurl my 85kg around.

Also, about 12 nm to torque the head bolts?

Should anything else be torque fastened?

Any other good cheap complimentary upgrades that should be included with these upgrades? Apart from DID chain?
:food-smiley-005:
 

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