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https://munivmotoblog.com/2016/01/07/case-close-gak-ada-istilah-dohc-abal-abal-adanya-dohc-overbore-vs-dohc-oversquareoverstroke/
Case Close : Gak ada Istilah DOHC Abal - Abal, Adanya DOHC Overbore VS DOHC Oversquare/Overstroke