Working of Variator Drive: Vario-drive provides various drive ratios between the engine and rear wheel according to the engine speed and load. It consists of two set of split pulleys – drive and driven pulley and drive belt between the pulleys. The drive pulley is attach to the crankshaft and driven to rear wheel. The variator (drive pully) consists of a fixed face and a movable face. The movable face is capable of sliding axially on the boss of the fixed face. The ramp plate is fixed by a nut and is pushes in the weight rollers against the drive face. As the speed of the engine increases, centrifugal force on the weight roller is also increased. This pushes the movable drive face inward. The unit then acts with a reduced drive ratio by allowing the drive belt to run on a pulley of greater diameter. The driven pulley and clutch weights are attached over the drive shaft. The force of the driven face spring is increased, the driven pulley turns and the clutch connects automatically. The effective diameter of the drive pulley is increased. The movable face is forced outward by means of the belt until equilibrium is reached between the torque tension of the belt and force of the spring. When this occurs, the drive ratio decreases and less torque is delivered to the final reduction.