Akses terbuka Jurnal
The Effect of Stroke Up with Ignition Timing Variations on The Programmable CDIon The Engine Performance of The Gl Pro Neotech Motorcycle in 1997
JMEL : Journal of Mechanical Engineering Learning · Vol. 15 No. 1 (2026) · hlm. 23–30
- ISSN
- 2252-651X
- Terbit
- 2026-07-12
- Penerbit
- Universitas Negeri Semarang
- Bahasa
- eng
Abstrak
Stroke-up modification and ignition timing adjustment are commonly used to improve motorcycle engine performance, yet their combined effect requires controlled empirical verification. This study examined the effect of a stroke-up crankshaft combined with programmable CDI ignition timing variations on compression pressure, torque, and power output of a GL Pro Neotech 160 cc motorcycle. Methods: A quantitative true-experimental method was applied through engine performance testing under controlled workshop conditions. The standard crankshaft was compared with a stroke-up crankshaft, while ignition timing was adjusted to 15°, 16°, and 17° before top dead center using a programmable CDI. Primary data were obtained from compression tests and chassis dynamometer measurements across 5000–10000 rpm, then analyzed descriptively using average values, tables, and performance graphs. Results: The stroke-up modification increased compression pressure from 12.43 bar to 15.67 bar, equivalent to a 26.1% increase. The 15° timing produced strong low-to-medium speed torque, while the 16° stroke-up configuration showed the most stable and superior performance at medium-to-high engine speeds, reaching 16.71 Nm at 6000 rpm and peak power around 7000 rpm. Conclusion: Stroke-up modification combined with 16° ignition timing is the most effective configuration for improving motorcycle engine performance under the tested operating conditions and rpm range.
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29 penulis · 58 tautan kepenulisan bersama · 2 lintas organisasi
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- State University of Semarang
- Sekolah Tinggi Ilmu Kesehatan Mitra Keluarga
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| Rekan penulis | Organisasi | Artikel bersama |
|---|---|---|
| Danang Dwi Saputro | State University of Semarang | 2 |
| Yeri Sutopo | State University of Semarang | 2 |
| Muh. Elvio Putra Kresnadi | Afiliasi tidak diketahui | 1 |
| Hadromi Hadromi | State University of Semarang | 1 |
| Bhramantya Panji S | State University of Semarang | 1 |
| Ahmad Shokib | State University of Semarang | 1 |
| Ridha Al Rizqi | State University of Semarang | 1 |
| Bunyamin | Afiliasi tidak diketahui | 1 |
| Wahyudi | State University of Semarang | 1 |
| Hadromi | State University of Semarang | 1 |
| Sofyan Al Farouqi | State University of Semarang | 1 |
| Dewi Kartikasari | State University of Semarang | 1 |
| Basyirun Basyirun | State University of Semarang | 1 |
| Zidane Mushthofaina Al Akhyar | State University of Semarang | 1 |
| Alfira Dwi Febrianti | State University of Semarang | 1 |
| Abdurrahman Abdurrahman | Afiliasi tidak diketahui | 1 |
| Sri Endah Wahyuningsih | State University of Semarang | 1 |
| Adhi Kusumastuti | State University of Semarang | 1 |
| Dewi Zulaekah | Afiliasi tidak diketahui | 1 |
| Nur Qudus | State University of Semarang | 1 |
| Rohayati Rohayati | Sekolah Tinggi Ilmu Kesehatan Mitra Keluarga | 1 |
| Sunarto Sunarto | State University of Semarang | 1 |
| Samsudin Anis | State University of Semarang | 1 |
| Samsudin Anis | State University of Semarang | 1 |
| Ayu Cholifah | Afiliasi tidak diketahui | 1 |
| Ade Novi Nurul Ihsani | State University of Semarang | 1 |
| Hendriana Oktora | Afiliasi tidak diketahui | 1 |
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