Suzuki uy 125 does not return oil when receiving oil.

1, Suzuki uy 125 does not return oil after receiving oil. Generally, the throttle pipe or throttle handle is stuck, and the throttle and oil needle of carburetor are stuck. The main reason is that the resistance is too great. In a few small cases, the throttle pipe is not lubricated, the resistance is too great, or the route of the throttle pipe is bent somewhere. This is the biggest resistance. Generally, the throttle line is under the fuel tank and pressed by the fuel tank, which may bend in some places.