Variator part for 125–150 cc 4-stroke scooters. The variator smoothly changes the gear ratio between the engine and the rear wheel without shifting gears. Manufacturer: KOSO.
Variator parts need replacing if you notice jerking during acceleration, vibration, loss of performance, or noise from under the left cover. They are usually checked together with the belt and rollers. Variator parts wear together, so when replacing them it is worth inspecting the belt, the rollers and both pulley surfaces.
