Oil Pump Cable for Aprilia / Piaggio 50cc 2T Models.
This is the cable which leads from the throttle cable splitter, to the oil pump butterfly and is responsible for increasing the oil supply when throttle is applied to the engine.
An essentially important part of the engine, and like any cable can fail due to corrosion and age. Often this cable can become tight due to corrosion, which leads to a tight or rough feeling throttle.
It is highly recommended to replace the entire throttle cable assembly if one part fails, due to the entire system being the same age and usually subjected to the same conditions that has caused one or more parts to fail.