Oil pump sprocket for 150 cc 4-stroke scooters. Country of origin: China. The part transmits rotation to the oil pump shaft so that lubricant is delivered to the engine components.
The sprocket must be replaced if the teeth are worn or the splines are sheared: the pump stops pumping oil, which quickly leads to engine damage. Also check the chain and the pump itself. Before replacement, check the oil level in the crankcase and the lubrication pressure.
