| dc.description.abstract | Motorcycles are one of the most widely used modes of transportation in developing countries
due to their affordability, fuel efficiency, and convenience. In Bangladesh, motorcycles are
extensively used for both personal and commercial purposes. However, frequent engine
failures reduce vehicle performance, increase maintenance costs, and negatively affect rider
safety. This study investigates the common causes of motorcycle engine failures based on
data collected from local repair workshops. The research focuses on identifying failure
patterns, analyzing mechanical causes, and evaluating the role of maintenance practices. A
total of 50 motorcycles were examined through direct inspection, mechanic interviews, and
service record analysis. The study reveals that piston ring wear, lubrication failure,
overheating, and valve damage are the most common causes of engine failure. Quantitative
analysis was conducted to calculate failure frequency, mean time between failures, and
maintenance cost implications. The findings indicate that improper maintenance and poor
lubrication significantly reduce engine life. The study concludes with practical
recommendations to improve engine durability and reduce operational costs. | en_US |
