At the same time when this enter pulley(sheave) moves, feeding output pulley(sheave) also moves and arrives closer for the mounted output pulley which consequently shift the A part of v-shaped belt wrapped over the output pulleys towards the better cross-sectional location in the output conical pulleys and preferred torque ratios https://andresloljh.thezenweb.com/gearbox-cvt-for-dummies-70691590