Elements of the cylinder head
1 - crackers; 2 - spring plate; 3 - valve spring; 4 - support washer; 3 - inlet valve; 6 - exhaust valve; 7 - oil scraper cap; 8 - guide sleeve of the intake valve; 9 - exhaust valve guide sleeve; 10 - inlet valve seat; 11 - exhaust valve seat; 12 - cylinder head.