Effect of pulley primary angle variation and roller 11 grams on 110 cc Scoopy injection engine

Abstract

Transmission automatic or known as (CVT) is a transmission that makes us feel comfortable because we only need to pull the gas without moving the transmission because the transmission is automatic. Automatic motors not only make driving easier but also facilitate the maintenance of the transmission. However, among racing motorbike lovers, this automatic transmission type motor is lacking in power. So, it needs to be modified to the CVT component to improve the performance of the machine. To improve this performance, we analyze pulley and standard roller manufacturers and primary pulleys with 3 kinds of pulley, namely standard angles of 14°, 13°, 12° and roller 11 gram variations to determine the comparison of Performa (horse power and torque). To find out the comparison of the test, we do the test using the Dyno test. From the test results, 13° pulley and 11 gram roller have increased significantly compared to standard 14° and 13 gram roller standard pulleys. This can be seen from the results of an increase in horse power and torque when using pulley 13° and 11 grams roller can be obtained on the highest horse power (Hp) at 3246 rpm, which is the highest 9.0 hp and torque (Nm) at the engine speed 2087 rpm which is 22.16 Nm. While the standard pulley of the factory is 14° and the standard 13 grams roller can be seen the highest horse power (Hp) at 3923 rpm round, which is 7.8 Hp and the highest Torque (Nm) at 2972 rpm engine speed which is 16.99 Nm. then from the results of this test analysis has increased horse power 1.2 hp and torque of 5.17 Nm.