This study presents a compelling case for the development of a motorcycle swingarm using aluminum alloy instead of stainless steel. By significantly reducing the weight of the component, various benefits are achieved, including improved fuel economy, reduced emissions, and lowered primary investment costs in the manufacturing process. The utilization of aluminum alloy not only reduces the weight of the swingarm but also simplifies and economizes the manufacturing process. The process, involving wood pattern making, casting, machining, and painting, is reported to be easier and cheaper compared to the existing method. This suggests that transitioning to aluminum alloy could potentially lead to cost savings and increased efficiency in production, particularly for small-scale manufacturing operations. Furthermore, the successful integration of the modified swingarm into a Suzuki Gixxer motorcycle, following Suzuki's assembly standards, demonstrates its compatibility and suitability for practical application. The swingarm passed all quality requirements and tests as per Suzuki Inspection Standards (SIS), indicating its reliability and performance in real-world conditions. Overall, this study highlights the feasibility and benefits of using aluminum alloy in motorcycle swingarm manufacturing. Beyond reducing weight (around 27%) and improving fuel economy (save up to 0.19 ml per km), this transition offers advantages in terms of production costs, quality enhancement, and environmental impact.