THE EFFECT OF ACCELERATION OF THE SCOOPY 110 AUTOMATIC MOTORCYCLE WITH VARIABLE ROLLER WEIGHT REDUCTION AND DRIVE PULLEY INCLINE ANGLE

Abstract

The widespread use of automatic motorcycles has increased the application of Continuously Variable Transmission (CVT) systems due to their ability to provide smooth power delivery and riding comfort. However, many users still experience less-than-optimal acceleration performance, particularly during initial acceleration, overtaking, and uphill riding. This condition indicates that the standard CVT configuration may not always provide the best acceleration characteristics. Therefore, optimization of CVT components, especially the drive pulley angle and roller weight, is required to improve vehicle performance.

This study aimed to analyze the effect of drive pulley inclination angle and roller weight on the acceleration performance of a Honda Scoopy 110 automatic motorcycle. An experimental method with a factorial design was employed. The independent variables consisted of three drive pulley inclination angles (13.3°, 13.6°, and 14.5°) and three roller weights (10 g, 12 g, and 15 g). Acceleration testing was conducted using a chassis dynamometer under controlled conditions to ensure objective and consistent measurements. The observed parameter was acceleration (m/s²). The collected data were analyzed using two-way Analysis of Variance (ANOVA) to evaluate the individual effects of each variable and their interaction.

The results showed that both drive pulley inclination angle and roller weight affected motorcycle acceleration. Lighter roller weights tended to improve acceleration by enabling faster CVT ratio changes, while variations in pulley angle influenced belt movement characteristics and torque transmission. The interaction between both variables also contributed to acceleration performance. Several combinations of pulley angle and roller weight produced higher acceleration values than the standard configuration. These findings indicate that proper optimization of CVT components can improve motorcycle acceleration performance and overall vehicle efficiency.