i wouldn't change anything INSIDE the engine if i were you. stick to simple IHE lang, para panalo

pag na-kalikot na yung makina mo medyo iba na magiging takbo nyan. lalo na pag nagkamali yung nag poport and polish nagka hairline crack yung cylinder head mo... patay. you'll never see the end of the problems.

buhay ng mga honda engines yung superior oiling systems at cylinder heads nila. that's why they're so efficient. hindi ko pagalaw yun if i were you.