Pengaruh penambahan katalis terhadap kinerja mesin otto berbahan bakar Pertamax = The catalyst effect on otto engine performance with Pertamax fuel

Perancangan dan pengembangan cylinder head dan camshaft assembly mesin otto satu silinder empat langkah berkapasitas 65 cc = Design and development cylinder head and camshaft assembly of otto engine single cylinder four stroke 65 cc capacity

Perancangan dan pengembangan connecting rod dan crankshaft mesin otto satu silinder empat langkah berkapasitas 65cc = Design and development connecting rod and crankshaft of four stroke internal combustion engine with 65cc capacity.

Aplikasi penambahan gas hidrogen pada motor bakar 4 langkah disertai pengecilan pilot jet dengan melakukan uji jalan kendaraan berbahan bakar pertamax = Appliacation adding the hydrogen gas to 4 stroke internal combustion engine and reduction of pilot jet size with the road test and pertamax fuel

Aplikasi penambahan gas hidrogen pada motor bakar 4 lngkah disertai pengecilan pilot jet dengan melakukan uji jalan kendaraan berbahan bakar premium = Application adding the hydrogen gas to four strokes internal combustion engine and reduction of pilot jet size with the road test and premium fuel