Pengaruh penambahan katalis terhadap kinerja mesin otto berbahan bakar premium = The influence of catalyst addition on the performance of otto engine

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

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

Laju penguapan tetesan bio pertamax pada temperatur 50 0 C dan 75 0 C