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All Journal Educatoria : Jurnal Ilmiah Ilmu Pendidikan Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan
Rahma Doni
Program Studi Pendidikan Teknik Otomotif, Fakultas Teknik, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences Other

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Pengaruh Kondisi Main Jet Karburator terhadap Konsumsi Bahan Bakar pada Mesin Bensin Empat Langkah 125 cc: A Systematic Literature Review Fakhrur Rozy; Rahma Doni; Rikki Paul Pangaribuan; Riyando Samuel Sinaga; Andi Bahar
Educatoria : Jurnal Ilmiah Ilmu Pendidikan Vol. 6 No. 3 (2026): July
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/educatoria.v6i3.1600

Abstract

Constant Velocity (CV) carburetors remain widely used in 125 cc four-stroke gasoline engines; consequently, the condition of the main jet is a critical factor influencing fuel consumption efficiency. While various studies have examined the impact of main jet condition and size on fuel consumption and engine performance, the findings remain fragmented, lacking a comprehensive overview. Therefore, this study aims to synthesize scientific evidence regarding the effect of carburetor main jet condition on fuel consumption in 125 cc four-stroke gasoline engines. A Systematic Literature Review (SLR) method was employed, adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Literature searches were conducted across Google Scholar, Garuda, and Scopus databases using predefined keywords. Fifty articles were initially identified; following a screening process based on inclusion and exclusion criteria, 20 articles were selected for analysis using a narrative synthesis approach. The review results indicate that main jet condition and size influence the air-fuel ratio, combustion efficiency, and fuel consumption. Main jets meeting manufacturer specifications facilitate optimal combustion, thereby enhancing fuel consumption efficiency; conversely, clogging or alterations in main jet size disrupt the air-fuel mixture balance, leading to increased fuel consumption and reduced engine performance. The novelty of this study lies in its comprehensive synthesis of research findings concerning the relationships between main jet condition, clogging mechanisms, combustion characteristics, and fuel consumption in 125 cc four-stroke gasoline engines. These findings are expected to serve as a scientific reference for future research and provide a basis for developing maintenance strategies and optimizing carburetor systems to improve fuel consumption efficiency.
Pengaruh Penyetelan Celah Katup Menggunakan Bahan Bakar Pertamax pada Motor Honda Beat Injeksi 2022 Josua Amindo Tua Manurung; Cavin Ananda Teguh S; Rahma Doni
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 6 No. 4 (2026): October (In Progress)
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v6i4.1502

Abstract

Valve clearance adjustment is an important aspect in motorcycle engine maintenance that affects engine performance, fuel consumption, and exhaust emissions. This study aims to analyze the effect of valve clearance variations on engine performance, specific fuel consumption, and exhaust emissions on the 2022 Honda Beat Injection using Pertamax fuel (RON 92). The study used an experimental method with three variations of valve clearance, namely standard (0.15 mm intake and 0.20 mm exhaust), reduced (0.10 mm intake and 0.15 mm exhaust), and enlarged (0.20 mm intake and 0.25 mm exhaust). The parameters measured include power, torque, Specific Fuel Consumption (SFC), CO, and HC emissions. Power and torque data were obtained using a chassis dynamometer, while fuel consumption and emissions were measured using a fuel consumption meter and a gas analyzer. The results showed that standard conditions produced the best performance with a maximum power of 6.8 kW at 7,500 rpm and a maximum torque of 9.2 Nm at 5,500 rpm, which is still in line with the performance characteristics of the 2022 Honda Beat. The lowest SFC value was obtained under standard conditions at 285 g/kWh. The lowest CO and HC emissions were also obtained under standard conditions, at 1.24% and 186 ppm, respectively. The analysis showed that deviations in valve clearance from manufacturer specifications cause decreased engine performance, increased fuel consumption, and increased exhaust emissions. Therefore, adjusting valve clearance according to manufacturer specifications provides better engine performance and emission quality.
Co-Authors Andi Bahar Cavin Ananda Teguh S Fakhrur Rozy Josua Amindo Tua Manurung Rikki Paul Pangaribuan Riyando Samuel Sinaga